The Scoop Online - April 2018

Selling Low Impact Development

Also Inside



The American Elm’s Comeback

New Committees Out & About Day on the Hill

EXCITING PLANTS Varieties from the New Plant Forum

Vol: 41 No: 04 Apr 2018 T H E O F F I C I A L P U B L I C AT I O N O F T H E M I N N E S O TA N U R S E R Y & L A N D S C A P E A S S O C I AT I O N

START THE SEASON OFF RIGHT!

Green Loon® Mulch & Professional Turf Supplies

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Volume 41 No. 04 Apr 2018

➾ S E CT I O N TITLE

CONTENTS 14

61 17 IN THIS ISSUE 8

Events

10 New Committees Now Forming Executive Director Cassie Larson talks about the topic-based groups starting at MNLA.

26

12 Out & About Teams of green industry advocates visited their Senators and Representatives to discuss our

14 Heyday of Conifers Faith Appelquist gives a history lesson on where and conifers are a successful

priorities.

42 New MNLA Members

species.     58 Day on the Hill Is a Huge Success Members met with or delivered packets of

17 American Elm Makes a Dramatic Comeback Dr. Calkins looks at how a favorite shade tree is making its return to viability.    

information to a record 71 legislators.

61 Utility Locates MNLA advises its members to remember these guidelines before digging this spring.

26 Selling Low Impact Development

62 Why Am I in Horticulture?

A report from Canada on how landscape firms are learning to turn a profit

Ivan Izzo talks about how he found his way to

while doing the right thing.   

an industry he loves.

35 New Plant Forum All the varieties presented during this popular session at Northern Green 2018.     

 Landscape & Hardscape Install & Design  Garden Services & Landscape Management  Garden Centers  Growers: Nursery & Greenhouse  Irrigation & Water Management  Arborists & Tree Services  All

The Scoop, April 2018, Issue 4, is issued monthly, 12 times per year.

All original works, articles or formats published in The Scoop are © Minnesota Nursery & Landscape Association, 2018, and may not be used without written permission of MNLA, 1813 Lexington Ave N., Roseville, MN 55113. Subscription price is $99 for one year, which is included with member dues. POSTMASTER: Send address changes to The Scoop, MNLA, 1813 Lexington Ave N., Roseville, MN 55113.

Editorial Contributions. You are invited to share your expertise and perspective. Article ideas and manuscripts should, whenever possible, reflect real and specific experiences. When submitting an article, please contact the publisher at jon@mnla.biz or 651-633-4987.

MNLA reserves the right to edit all Scoop content.

april 18

MNLA .biz

5

MINNESOTA NURSERY & LANDSCAPE ASSOCIATION Successful Businesses Grow Here!

1813 Lexington Ave. N. Roseville, MN 55113 651-633-4987 • Fax: 651-633-4986 Outside the metro area, toll free: 888-886-MNLA, Fax: 888-266-4986 www.MNLA.biz • www.NorthernGreen.org

MISSION: The mission of the Minnesota Nursery & Landscape Association is to help members grow successful businesses.

BOARD OF DIRECTORS

scott frampton, president

Landscape Renovations 651-769-0010 • sframpton@landscaperenovations.com

tim malooly, cid, clia, cic, VICE-PRESIDENT Water in Motion 763-559-7771 • timm@watermotion.com

randy berg, mnla-cp, SECRETARY-TREASURER Berg’s Nursery, Landscape/Garden Center 507-433-2823 • randy@bergsnursery.com

FAITH APPELQUIST

Tree Quality LLC 612-618-5244 • faith@treequality.com

matt mallas

Hedberg Supply 763-512-2849 • mmallas@hedbergaggregates.com

mike mcnamara

Hoffman & McNamara Nursery & Landscaping 651-437-9463 • mike.mcnamara@hoffmanandmcnamara.com

AD LIST All Stone Solutions ........................................................................................... 51 Arborjet ............................................................................................................ 18 Bachman's Wholesale Nursery & Hardscapes .................................................... 3 Borgert Products, Inc. ....................................................................................... 34 Carlin Horticultural Supplies/ProGreen Plus ..................................................... 31 Central Landscape Supply ................................................................................ 28 COWSMO, INC. ............................................................................................... 24 CST Distributors ............................................................................................... 20 Cushman Motor Co. Inc ................................................................................... 20 Dayton Bag & Burlap ........................................................................................ 51 Edney Distributing Co., Inc. ............................................................................. 48 Fury Motors ...................................................................................................... 52 Gertens Wholesale & Professional Turf Supply .................................................. 2 Gopher State One-Call ..................................................................................... 56 Haag Companies, Inc. ...................................................................................... 55 Hedberg Landscape & Masonry Supplies .......................................................... 4 Hiway Federal Credit Union ............................................................................. 25 Jeff Belzer Chevrolet .................................................................................. 32–33 Klaus Nurseries ................................................................................................. 28

john o'reilly

Landscape Alternatives .................................................................................... 31

jeff pilla, mnla-cp

Midwest Groundcovers LLC ............................................................................. 22

Otten Bros. Garden Center and Landscaping 952-473-5425 • j.oreilly@ottenbros.com Bachman’s, Inc. 612-861-7600 • jpilla@bachmans.com

nick sargent

Lano Equipment, Inc. ....................................................................................... 24

Midwest Transmission Center / DBA Clutch & U-joint Proven Force ............... 28 Out Back Nursery ............................................................................................. 59

Sargent’s Landscape Nursery, Inc. 507-289-0022 • njsargent@sargentsgardens.com

Plaisted Companies ............................................................................................ 7

cassie larson, cae

Prairie Restorations, Inc. ................................................................................... 51

MNLA Executive Director 651-633-4987 • cassie@mnla.biz

Resultants for Business, Inc. (RFB) .................................................................... 56 Rock Hard Landscape Supply ........................................................................... 59

STAFF DIRECTORY

executive director:

S & S Tree and Horticultural Specialists ............................................................ 24

membership director & trade show manager:

SMSC Organics Recycling Facility .................................................................... 59

Cassie Larson, CAE • cassie@mnla.biz Mary Dunn, CEM • mary@mnla.biz communications dir.: Jon Horsman, CAE • jon@mnla.biz education/cert. manager: Susan Flynn • susan@mnla.biz Government Affairs Dir: Larry Johnson • larry@mnla.biz

regulatory affairs manager: Jim Calkins • jim@mnla.biz administrative asst.: Gayle Anderson • gayle@mnla.biz accountant: Kris Peterson • kris@mnla.biz foundation program coordinator: Paulette Sorenson • paulette@mnla.biz

advertising sales: 952-934-2891 / 763-295-5420

Faith Jensen, Advertising Rep • faith@pierreproductions.com Betsy Pierre, Advertising Mgr • betsy@pierreproductions.com legislative affairs consultant: Doug Carnival

6

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Sylva Corporation Inc. ...................................................................................... 60 The Tessman Company .................................................................................... 38 Tri-State Bobcat, Inc. ........................................................................................ 57 Truck Utilities, Inc. ............................................................................................. 51 Unilock ............................................................................................................. 16 Versa-Lok Midwest ........................................................................................... 41 Wheeler Landscape Supply .............................................................................. 18 Xcel Energy ................................................................................................ 11, 48 Ziegler CAT ......................................................................................... Back Cover

Volume 41 No. 04 Apr 2018

➾ S E CT I O N TITLE

➾ C ALE N DAR

➾

APR 9–10

MAY5

 ➾

PESTICIDE CERTIFICATION WORKSHOP & EXAM MDA, St. Paul

Minnesota Landscape Arboretum

MNLA.biz

Arboretum.mn.edu

Prepare for the Category A & E Pesticide Applicator Certification Exam by attending this 1½ day study program.

Day 2 includes testing, if desired.

In honor of the Arboretum’s 60th anniversary and as the very first of the Janet Sinner Endowed Horticultural Speaker Series, attend this interesting workshop and learn more about trees and time. You’ll discover how tree rings can help scientists determine historic temperatures, rainfall, fire events, and even health of the ecosystem.

AUG7 TESSMAN COMPANY BUYING SHOW & HORT ACADEMY

MNLA .biz

april 18

AUG14 ➾



MNLA NIGHT AT THE SAINTS GAME CHS Field, St. Paul

Mystic Lake, Prior Lake

MNLA.biz

Tessmanseed.com

You are invited to the 4th Annual MNLA Night at the Saints Game. We have reserved the Star Tribune Skybox for our group. Includes a ticket to the game and dinner.

New show location for 2018! Ready to help with all your greenhouse, nursery, garden center and landscaping needs.

8

THE SECRETS OF TREE RINGS: What Our Trees Can Tell Us About the History of our Environment

2018 MNLA seminars generously supported by:

JULY 14–17

MNLA FOUNDATION WIDMER GOLF TOURNAMENT

➾

CULTIVATE 2018

JULY26 BAILEY SUMMER EXPO

Majestic Oaks Golf Club Ham Lake

Columbus, OH

This annual summer event is open to all Bailey Nurseries customers, and features displays, seminars, demonstrations and tours.

MNLA.biz

Cultivate18.org

Join your fellow Hackers for Horticulture at the 27th Annual Widmer Golf Tournament.

Proceeds benefit the MNLA Foundation Research Fund.

Cultivate is the premier national event for horticulture professionals.



MEMBER APPRECIATION DAY MNLA Office, Roseville

AUG 14–16

➾

AUG14

 ➾

JULY24

IGC SHOW

MNLA.biz

Navy Pier, Chicago

We will be celebrating our awesome members with a full day of fun.

Stop by the MNLA Office for donuts in the morning and ice cream in the afternoon. Then join us for an evening at CHS Field in St. Paul to watch the Saint Paul Saints take on the Sioux Falls Canaries.

IGCshow.com Tradeshow and education sessions focused 100% on the special interests of independent garden centers.

SEPT19 ➾



MNLA FOUNDATION SHOOTOUT Minnesota Horse & Hunt Club, Prior Lake MNLA.biz Don’t miss this annual sport clays charity event that raises money for scholarships! The course runs at a beginner’s level — the focus is on fun. Proceeds benefit the MNLA Foundation Scholarship fund.

KEY:

 Business

 Skills Training

 Leadership Development

 Networking

General ➾

All information on these and other industry events are online at MNLA.biz. april 18

MNLA .biz

9

➾ F R OM THE PRESIDEN T

New Committees Now Forming MNLA is constantly striving to be innovative and offer new programs and services to members.

After nearly 100 years of serving the green industry in Minnesota, the accelerating pace of change in business today requires new and sharper thinking to help our members thrive.

When talking with members about the topics that “keep them up at night,” the same two themes continue to emerge time and time again: workforce and water.

• How do I establish a top-notch culture that attracts good people?

Cassie Larson MNLA Executive Director

• How do I solve hiring, training and retention issues in an era where it’s hard to find qualified employees?

• Living plants require water. How do I ensure access to the water needed for my business or landscape to survive?

• How do I navigate the constant regulatory changes that affect my business?

In an effort to address these high-level topics head on, the MNLA Board of Directors has commissioned the creation of two new association committees: Career Development Committee and the Committee on Water Resources.

Let’s start with the Committee on Water Resources.

This committee will serve the Board of Directors via leadership and action to assure that water remains practically available for use in the landscape and to protect the interests of member practitioners in the design, installation, maintenance, and management of water in the landscape. The committee will work with both the Government Affairs Committee as well as the Education & Certification Committee on relevant programming and issues. They will also participate in the creation, adoption, evaluation of, and promotion of best practices around outdoor water use. And, promote members and projects that exemplify responsible use of water resources.

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Second is the Career Development Committee which is charged with the creation of a career path model to assist with green industry employee retention and promote employee advancement. An adequate supply of qualified personnel is vital to the industry and employee development is key to retention. The committee will make recommendations to the Board of Directors and provide leadership in promoting these recommended programs. It is important to distinguish that the work of the Career Development Committee is differentiated from the MNLA Foundation’s workforce efforts by its direct focus on individuals currently working in the profession while the MNLA Foundation focuses on recruitment of youth into green industry careers.

The other long-standing committees of the MNLA, including Government Affairs, Communications & Technology, Membership, Education & Certification, Networking, Trade Show, and Board Development, will continue to work on behalf of the members.

But, none of this work is possible without committed member volunteers. I encourage you to consider serving on one of these new or long-standing MNLA committees. Members often say that volunteering allows them to fully engage and get the most out of their association.

The connections you make can serve your business and the entire industry. Interested in volunteering? Please reach out to myself, any MNLA staff member, or a Board member. We’d love to help you get plugged in.

Stay tuned! As these new committees begin tackling these important topics, we are excited about developing products, services, and resources to benefit your business!

As these committees begin their work you will see information in the Scoop, MNLA Enews, and via e-mail that will keep you apprised of their work.

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2/23/18 9:14 AM

➾ DAY O N THE HILL

MEMBERS OF MINNESOTA’S GREEN INDUSTRY gathered at the State Capitol in St.

&

Paul on Wednesday, March 7th for 2018 Green Industry Day on the Hill! The day began with an issue & advocacy orientation at the Cedar Street Armory, during which, attendees learned about MNLA’s top policy priorities this session.

Green Industry Day on the Hill 2018 was a great success thanks to our 50 attendees who were able to touch 71 legislators with issues important to the green industry. Thanks to all who participated.

Mark, Matt, Chrissy, and Dan met with State Representative Lyndon Carlson (D - Crystal), center. Representative Carlson has served in the House since 1972 and has met with countless members.

Kent met with State Representative Raymond Dehn (D - Minneapolis), right. Rep. Dehn is a co-author on a bill to end the “Duty to Defend.”

Constituents stopped by Senator Kari Dziedzic’s (D - Minneapolis) office and saw the award MNLA presented her last year!

Ron, Kent, Christian, Kristen, and Tim visited with State Representative Fue Lee (D - Minneapolis), third from the left.

Rich, John, Gail, and Faith met with Representative Maye Quade (D – Apple Valley). She is third from the left.

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Throughout the day, teams of green industry advocates visited with their Senators and Representatives to highlight our policy priorities, and build relationships. Check out these photos from their meetings!

Christian, Kristen, Ron, Kent, and Tim visited with State Representative Cindy Pugh (R - Chanhassen) a co-author of the uniform state labor standards bill, HF 600. She is fourth from the left.

Russ, Chrissy, Dan, Matt and Mark visited with State Representative Peggy Scott (R - Andover), third from the left. Representative Scott is a co-author of HF 746, a bill to end the “Duty to Defend.�

Cara, Bryan, Jon, David, and Emily met with Senator John Marty (D - Roseville), fourth from the left.

Jake, Todd, Kelly and Dan met with Senator Steve Cwodzinski (D - Eden Prairie), center.

Tina, Randy, Luke, and Patrick met with Senator Warren Limmer (R - Maple Grove , fourth from the left,) during the Green Industry Day on the Hill.

The team of Diana, Garrett, Amanda, and Eric prepare for legislative visits at the Capitol during Green Industry Day on the Hill.

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HEYDAY OF CONIFERS About 400 million years ago, the first vascular plants (plant tissues that conduct water, sap, and nutrients) appeared on Earth. These were plants you would recognize today, such as horsetails, mosses and ferns.

Faith Appelquist | Tree Quality LLC

(Facing Page): A conifer forest in the Rocky Mountains has the eerie feel of bygone world.

Conifers are harbingers for climatic change for millions of years, survivors across deep time.

(Above Left): A high perch for a pair of bald eagles. Douglas fir is one of the world’s tallest conifers capable of growing over 300 feet.

(Above Right): A redwood tree in Big Sur California. Five percent of the world’s conifers are in California.

(Left): Lodgepole pine forest in Yellowstone National Park. Conifers often grow where soil or climate is sub-optimal.

rom these plants, the first trees evolved around 365-millionyears ago. From these swampy forests, conifers appeared.

Conifer domination was long and illustrious, and they happily shared the earth with the dinosaurs. Conifer resins and poisons would have offered defense against plant-eating dinosaurs. In the book Jurassic Park, scientists clone dinosaurs from the blood found in ancient amber (conifer resin)-trapped mosquitoes. This was the heyday of the conifers, from 250–65 million years ago, nurturing the evolution of 20,000 species.

Around 250 million years ago, most of the earth was squashed together in a giant land mass called Pangea. By the time hardwoods had evolved, Pangea had broken into the continents we all know.

This explains why the hardwoods can be similar to each other and yet remain genetically separate around the globe. For example, an Asian ash tree is a close cousin of our North American ash, but because they evolved on separate continents, our ash trees have no evolutionary resistance to the Emerald ash borer beetle brought here from Asia.

By 95-million-years ago, a number of trees we would recognize today were around: laurels, magnolias, planes, maples, oaks, willows and within another 20 million years, the palms. By then the

hardwoods underwent a massive expansion, undoubtedly helped by a warming climate. When the dinosaurs were disappearing (by 65 million years ago) the hardwoods were dominating the world with the conifers exiled mostly into the northern latitudes and the Pacific Rim. Hardwoods co-evolved with various animals and particularly insects to move pollen from flower to flower. Colorful petals, nectar, and fragrance that we associate with flowers developed in response to this need. Conifers are exclusively wind pollinated, not animal pollinated. Conifers declined to 630 species while over 300,000 species of hardwood exist today.

The decline of the conifers and concurrent expansion of hardwoods represents one of the most important distributions of plant life on Earth. Today less than 1% of all plant species are conifers, but they cover 30% of Earth’s forested land. Conifers are the largest (giant sequoia), tallest (coast redwood), and oldest (bristlecone pine) living things. They’re still here, and the dinosaurs are long gone.

FAITH APPELQUIST

is an ISA Board Certified Master Arborist, an

ISA Municipal Specialist MN, and an ASCA Registered Consulting Arborist®. Faith can be reached at faith@ treequality.com.

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âžž R E S E ARCH FOR THE R EAL WO R L D

The American Elm Is Experiencing a Dramatic and Welcome Comeback Although the American elm population (Ulmus americana; Ulmaceae – Elm Family) in North America has been decimated throughout most of its native range and in designed landscapes

by Dutch elm disease (DED), American elm (also known as white elm and sometimes gray, water or swamp elm) remains a beloved and highly-valued species based on public sentiment, its beauty as a shade tree and adaptability and persistence in urban environments, and its importance in native ecosystems.

Dr. James Calkins Research Information Director MNLA Foundation

Native to most of the eastern and central United States and southeastern and southcentral Canada, it is estimated that hundreds of millions of American elm trees have been lost to DED during the 90 years that have passed since the introduction of the disease to North America from Europe in a shipment of elm logs in 1928. Although American elm is found in both upland and lowland plant communities, it is considered a foundational species in floodplain forests where the loss of American elm may soon be compounded by the loss of ash trees (Fraxinus spp.) caused by another introduced pest – emerald ash borer (EAB; Agrilus planipennis). In addition, although they have never been considered important landscape trees, the other two elm species that are native to Minnesota, red elm (Ulmus rubra; also called slippery elm) and rock elm (Ulmus thomasii; also called cork elm) are also susceptible to DED and have been similarly affected by DED in their forest habitats. Siberian elm (Ulmus pumila), an introduced species native to central and northeastern Asia that has become naturalized across much of North America, including in Minnesota, is considerably more resistant to DED, but is not immune and can harbor the disease and the bark beetles responsible for its spread. Siberian elm is also not a very attractive tree, is very susceptible to elm leaf beetle (Pyrrhalta luteola), and has escaped cultivation and become problematic as an invasive species in some areas. Although the damage to North American elms caused by DED has been widespread and devastating, and has not abated, recent research suggests that because elms are wind pollinated

and self-incompatible DED has and will not reduce the genetic diversity of American elm or the other elm species native to North America. In addition, basic research designed to help us understand the DED pathogens better, and the search for improved methods for managing DED, including the selection of resistant elms, continues with considerable success.

Dutch elm disease, caused by the pathogenic, ascomycete microfungi Ophiostoma ulmi (formerly Ceratocystis ulmi) and the more aggressive Ophiostoma novo-ulmi (a more recent introduction and now the more common and bigger threat), was first documented in Minnesota in the City of St. Paul in 1961. It has been estimated that 140 million American elm trees were growing in municipalities across the state at the time and that American elm was, by far, the dominant species in municipal landscapes and ubiquitous as a boulevard tree. Although, and for reasons unknown, and similar to what is now being observed for emerald ash borer in the state, DED did not spread as quickly in Minnesota as it did in other states to the east. Good sanitation and prophylactic treatment programs have proven to be effective in protecting existing trees and may have played a role in slowing the spread of DED in Minnesota. As we all are well aware, however, the disease, did eventually spread across the state, vectored by human activities and the native elm bark beetle (Hylurgopinus rufipes) and the introduced European elm bark beetle (Scolytus multistriatus) which breed under the bark of dead elm trees.

More locally, the disease is also spread very effectively through root grafts between infected and healthy trees. april 18

MNLA .biz

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➾ RE S E ARCH FOR THE R EAL WO R L D

Figure 1. A spectacular American elm tree (Ulmus americana) growing on the Hamline University campus in St. Paul, Minn., that exemplifies the aesthetic characteristics that helped make American elm the species of choice as a boulevard and landscape tree across North America prior to the devastation caused by Dutch elm disease (Photo Credit: Jim Calkins).

The history of DED in North America and in Minnesota is a sad and unfortunate tale and the Minnesota story has been well-documented in an extension publication written by Dr. David French (former University of Minnesota forest and shade tree pathologist) in 1993 (see resources list below).

In response to the damage caused by DED, hundreds of millions of dollars and countless hours and valuable resources have been dedicated to the preservation of existing American elm trees. Early detection through routine and sustained scouting, an unwavering commitment to sanitation (rapid removal of infected trees), the elimination of root grafts between infected and healthy trees, vector (elm bark beetle) management, the use of injected fungicides, and resistance, ideally involving multiple forms of resistance, have been and continue to be the keys to success in DED management.

While 90% or more of the elm trees in infested areas have died as a consequence of Dutch elm disease, some trees have survived and it is these survivor trees that may ultimately be the answer to the ongoing DED threat. In fact, a growing number of elm cultivars with varied parentages and levels of resistance to DED have been developed through dedicated breeding and selection efforts involv-

ing a variety of elm species. At the same time, it is important to remember that these cultivars are clones and the DED pathogen is mutating all the time; as a result, resistance within the population of newly-planted DED-resistant trees is limited and trees that appear to be resistant now may be susceptible to future strains of the DED pathogens. While resistance has great potential and is a valuable tool in the preservation of elms, it will only be effective so long as plant breeders can keep ahead of a pathogen that has mutated in the past, and subsequently gained the ability to attack and kill many of the resistant elm selections that had been developed and were available at the time, and is likely to mutate again in the future. For these reasons, caution is advised and the new, disease-resistant elm cultivars should not be over-planted so history does not repeat itself. This is not only true for DED-resistant elms; it is true for all tree species planted in designed landscapes. So long as invasive species are avoided, diversity — species diversity and within-species diversity – is the key to healthy and resilient urban and community forests.

Although a number of elm cultivars, including selections at the species level and interspecific hybrids, that are resistant to DED have been developed over the years, few appear to be completely satisfactory given different perspectives and the number of defining metrics involved. There is also a need to increase the diversity of DED-resistant cultivars available to avoid overreliance on just a few cultivars and expand the genetic underpinnings of DED resistance.

As a result, the search for resistant American elms continues. And while some of the DED-resistant hybrid selections exhibit a variety of desirable characteristics (e.g., adaptable, good form, pest resistance) and may prove to be attractive and reliable landscape trees, they are not American elms and are not replacements for the native species in the wild. In addition, the possibility that these hybrids could hybridize with American elm and other native elms and thereby contaminate native gene pools may also be a concern in native ecosystems from a native elm preservation and conservation perspective. For example, it has been fairly well documented that Siberian elm (Ulmus pumila) can and does hybridize with red elm (Ulmus rubra).

While, and for good reason, DED has been the focus of elm breeding and selection efforts, it is also important to remember that elms and growers of elms face other challenges. In addition to DED, a variety of other disease and insect pests, susceptibility to storm damage, and a number of other aesthetic, production, and landscape characteristics should also be considered when selecting elm cultivars. Elm yellows (also called elm phloem necrosis), which is sometimes mistaken for DED, is perhaps the most important, but has received relatively little attention from a research perspective; it is a serious and lethal disease that is caused by a phytoplasma (a class of bacteria that lack cell walls; specifically, elm yellows phytoplasma – Candidatus Phytoplasma ulmi) and spread by leafhoppers and spittlebugs and possibly through root grafts. Elm leaf beetle (Xanthogaleruca luteola), Japanese beetle (Popillia japonica), and verticillium wilt (Verticillium spp.) are other concerns.

While the life cycle of the DED fungal pathogens are well-understood and DNA sequencing has recently been completed for the genomes of both pathogens (an important achievement), research april 18

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focused on the relationships of specific genes to pathogenicity is just beginning.

Conversely, the genetics of DED tolerance is not yet fully understood and this is an area where further research is needed.

An improved understanding of the nature of DED resistance will be helpful in the development of new DED-resistant elms with new and enhanced modes of resistance. Some of the new elm selections are difficult to propagate from cuttings, which is the ideal, and basic and cultivar-specific research related to the propagation of elms continues.

For those interested in keeping up with the most recent research findings and perspectives related to DED and its management, the Proceedings of the American Elm Restoration Workshop 2016 should be an interesting read (see resources list).

The proceedings report on the findings of research efforts focused on elm pathogens, American elm ecology, and American elm reintroduction in the United States and Canada. Research performed at the University of Minnesota is included and additional information about elm research in Minnesota can be found at https://trees.umn.edu/ research-elm-project.

Dr. Michael Dirr describes American elm as a “fantastic, majestic, almost-perfect native tree” (Dirr’s Encyclopedia of Trees & Shrubs, 2012) and picks ‘Creole Queen’, ‘Jefferson’, ‘New Harmony’, Prairie ExpeditionTM (‘Lewis and Clark’), ‘Princeton’, and ‘Valley Forge’ as some of the best DED-resistant American elm selections. He advises, however, that DED-resistant elms should be planted with caution and not be overplanted because the DED pathogen has mutated in the past and is likely to do so again. Other species-level elm cultivars that are resistant to DED are also recommended for consideration including Emerald Sunshine® (‘JFS-Bieberich’), an Ulmus davidiana x japonica (Japanese elm) selection (sometimes, but incorrectly listed as a cultivar of U. propinqua which is a synonym), as are several cultivars of hybrid origin involving various combinations of Ulmus davidiana var. japonica, U. minor (synonym – U. carpinifolia; smoothleaf elm, European field elm), U. parvifolia (Chinese elm, lacebark elm), U. pumila (Siberian elm), U. wil-

Figure 2. Young, ‘Princeton’ elm trees (Ulmus americana ‘Princeton’) planted near the state capital building in St. Paul, Minn.; although reports vary, ‘Princeton’ elm is believed to be moderately to highly resistant to Dutch elm disease; note the very narrow branching pattern and the distinctly upright habit that results; it is possible that the narrow crotch angles and included bark may make the branches susceptible to breakage and especially during ice storms; although these trees have not been affected while nearby lindens have, the foliage of ‘Princeton’ elm is reported to be susceptible to damage caused by Japanese beetles (Photo Credit: Jim Calkins).

soniana (Wilson’s elm; increasingly considered a synonym of U. davidiana var. japonica), and others. Highlighted cultivars of hybrid origin include ‘Cathedral’ (U. davidiana var. japonica x U. pumila), ‘Frontier’ (U. carpinifolia x U. parvifolia), ‘Jacan’ (U. davidiana var. japonica), ‘New Horizon (U. davidiana var. japonica x U. pumila)’, ‘Prospector’, ‘Regal’, ‘Sapporo Autumn Gold’, and TriumphTM (‘Morton Glossy’; VanguardTM x Accolade®). The hybrid cultivars Accolade® (‘Morton’; U. davidiana var. japonica x wilsoniana), CommendationTM (‘Morton Stalwart’), Danada CharmTM (‘Morton Red Tip’), and VanguardTM (‘Morton Plainsman’; U. davidiana var. japonica x U. pumila) are also mentioned. Obviously a number of these selections are from the Morton Arboretum breeding program initiated by Dr. George Ware.

The University of Minnesota has been evaluating elms for potential use in Minnesota for nearly 20 years and has recently produced

a publication on DED-resistant elms for Minnesota (see resource list). Recommended American elm selections include ‘Princeton’, Prairie ExpeditionTM (‘Lewis and Clark’), ‘New Harmony’, St. CroixTM (‘St. Croix’; a selection from Afton, MN, and a First Editions® release from Bailey Nurseries headquartered in St. Paul, MN), and ‘Valley Forge’. Cultivars of Asian species and of hybrid origin include Accolade® (‘Morton’), ‘Cathedral’, ‘Discovery, CommendationTM (‘Morton Stalwart’), Dadana CharmTM (‘Morton Red Tip’), and TriumphTM (‘Morton Glossy’).

The findings of the National Elm Trial, a 10-year cooperative effort intended to evaluate the performance of elm hybrids and American elm selections (14 to 18 cultivars depending on location) in different regions (15 states and 16 locations) and coordinated by Colorado State University are also of interest and have recently been published in the journal Arboriculture & Urban Forestry (see resources for full citation and link). Reports from many of the individual cooperators are also available online and the University of Minnesota Landscape arboretum was one of the cooperators (https://bspm. agsci.colostate.edu/files/2013/03/MN-elm-trial-Feb-15-2016.pdf ).

The trees were evaluated based on survival, growth rate, branching pattern, form, insect and disease resistance, and general performance. Although the best performers varied by location, the best performers were Accolade® (‘Morton’), CommendationTM (‘Morton Stalwart’), Danada CharmTM (‘Morton Red Tip’), ‘New Harmony’, New Horizon’, ‘Patriot’, ‘Princeton’, and TriumphTM (‘Morton Glossy’). Of these, ‘New Harmony’ and Princeton’ are cultivars of American elm while the others are hybrid selections. The worst performers were ‘JFS-Bieberich’, ‘Frontier’, and ‘Homestead’. In Minnesota, acceptable cultivars included the American elm cultivars ‘Princeton’ and ‘Valley Forge’ and the hybrid cultivars ‘Morton Glossy’ (TriumphTM), ‘Morton Plainsman’ (VanguardTM ), ‘Morton Stalwart (CommendationTM), ‘Morton Red Tip’(Danada CharmTM), ‘Morton’ (Accolade®), ‘Patriot’, and ‘Pioneer’. Additional information about the National Elm Trial and its findings are included in the journal article.

Not all of the DED-resistant elms are widely available from nurseries and some can sometimes be difficult to find. The selections that are most commonly available include Accolade® (‘Morton’), ‘Cathedral’, Prairie ExpeditionTM (‘Lewis and Clark’), ‘Princeton’, ‘St. CroixTM (‘St. Croix’), TriumphTM (‘Morton Glossy’), and ‘Valley Forge’. ‘Discovery’, ‘New Horizon’, and ‘Patriot’ are also fairly easy to find. Hopefully additional cultivars will also become more widely available to broaden the options for planting and increase the diversity of the DED-resistant cultivars planted. When purchasing elms, it is important to know how they have been propagated.

Initially, new DED-resistant elms are sometimes tissue cultured to produce larger numbers of plants quickly. Depending on variety and grower, elms are generally produced from summer softwood cuttings or grafting (chip budding) on compatible elm rootstocks. In some cases, root cuttings and layers can also be used. For grafted elms, it is important that the rootstock also be DED-resistant. Research has improved the ability to propagate elms from cuttings and cuttingpropagated elms are becoming the norm.

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Figure 3. New, DED-resistant elm cultivars (species and hybrids)

Figure 4. One of many sculptures carved from the stumps of American

are being trialed across the country to assess DED resistance, cold

elm trees lost to Dutch elm disease (DED) on the Minnesota State

hardiness, and other performance characteristics; this young ‘Pioneer’

Fairgrounds; while fun and interesting, and a compelling reminder of

elm is growing on the University of Minnesota, St. Paul campus in St.

the devastation caused by DED, this is a sad end for a valuable shade

Paul, Minn.; ‘Pioneer’ elm is a cultivar of hybrid origin resulting from a

tree (Photo Credit: Jim Calkins).

cross between U. glabra (Scotch elm) and U. minor (synonym — U. carpinifolia; smoothleaf elm); it is a medium-sized tree with a rounded crown, dark green foliage, and good yellow fall color; although this tree and others nearby have survived without injury for at least 10 years, ‘Pioneer’ is typically rated as only being hardy to U.S.D.A. Cold Hardiness Zone 5 (Photo Credit: Jim Calkins).

are that we must avoid the introduction of invasive species — whether they be diseases like the fungal pathogens responsible for DED, insects like the European elm bark beetle that serves as a vector for DED, or invasive plants — and promote species and genetic diversity in designed landscapes. Overreliance on a limited number of species increases the likelihood for significant losses in the presence of a destructive pest. It remains unclear whether these lessons have actually been learned. The ongoing and devastating threat posed by emerald ash borer to ash trees that have been overplanted as replacements for dying elms in designed landscapes, and to native ash trees in native ecosystems, suggests that we did not learn this important lesson, at least in the immediate aftermath of DED.

Hopefully the EAB situation will reinforce these important lessons and prove to be a defining experience that changes habits in the future. There is evidence that this may, indeed, be the case and the nursery and landscape industry can play a central role in promoting species diversity in designed landscapes. With the introduction of DED-resistant American elm cultivars, American elms are once again being planted in designed landscapes and are being planted quite extensively. This is understandable given the iconic nature of the species, the adaptability of the species to tough sites and urban conditions, and the limited presence of American elms in contemporary landscapes. Thanks to dedicated research efforts, it is exciting to see DED-resistant elms being developed and the planting of these elms is a welcome development. The return of heathy populations of DED-resistant American, red, and rock elms in native ecosystems remains a significant challenge, but DED-resistant elms are already being used for this purpose and ongoing research and restoration efforts are being pursued by the U.S.D.A. Forest Service and others.

Let’s hope they will be successful. april 18

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For more detail and additional information about DED-resistant elm research and DEDresistant elms, consult the following selected resources: Pinchot, C.C., K.S. Knight, L.M. Haugen, C.E. Flower, and J.M. Slavicek (editors). 2017.

Proceedings of the American Elm Restoration Workshop 2016. Lewis Center, OH; October 25-27, 2016. United States Department of Agriculture (USDA), Forest Service, Northern Research Station. General Technical Report NRS-P-174. 157 pages. https://doi. org/10.2737/NRS-GTR-P-174 https://www.nrs. fs.fed.us/pubs/54921 Griffin, J.J., W.R. Jacobi, E.G. McPherson, C.S. Sadof, J.R. McKenna, M.L. Gleason, N.W. Gauthier, D.A. Potter, D.R. Smitley, G.C. Adams, A.B. Gould, C.R. Cash, J.A. Walla, M.C. Starrett, G. Chastagner, J.L. Sibley, V.A. Krischik, and A.F. Newby. 2017. Ten-Year Performance of the United States National Elm Trial. Arboriculture & Urban Forestry 43(3):107–120. https://www.fs.fed.us/psw/ publications/mcpherson/psw_2017_mcpherson002_griffin.pdf Gillman, J., C. Giblin, G. Johnson, E. Sagor, M. Reichenbach, and G. Wyatt. 2016. Elm Trees – Dutch Elm Disease Resistant Varieties. University of Minnesota Extension. http:// www.extension.umn.edu/environment/agroforestry/elm-trees.html French, D.W. 1993. History of Dutch Elm Disease in Minnesota. Minnesota Agricultural Experiment Station through the University of Minnesota Digital Conservancy. https:// conservancy.umn.edu/handle/11299/141484; http://hdl.handle.net/11299/141484 St. George, Z. 2016. Can Cloning Save the American Elm? The Week; March 29, 2016. http://theweek.com/articles/613609/cloningsave-american-elm Dirr, M.R. 2011. Dirr’s Encyclopedia of Trees & Shrubs. Timber Press, Inc., Portland, OR. 951 pages.

Morton Arboretum. Elm Cultivars. http://www. mortonarb.org/trees-plants/tree-plant-descriptions/elm-cultivars (Accessed January 7, 2017) Carley, D. 2017 (last update). Saving the American Elm. http://www.elmpost.org/ (Accessed January 7, 2017) Carley, D. 2007. Comparison of the Available American Elm Cultivars. http://www.elmpost. org/compare.htm (Accessed January 7, 2017) To comment on this research update, suggest research topics of interest, or pass along a piece of research-based information that might be of interest to your industry colleagues, please email us at Research@MNLA.biz.

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Scott Barber | Landscape Ontario

ELOPMENT This article was originally published in Landscape Trades, Canada’s premier horticultural trade publication.

Doing the right thing, and turning a profit: As water infrastructure across Canada ages and becomes more expensive, and the amount of impervious surface grows through housing and commercial developments, the importance of Low Impact Development (LID) for stormwater management and watershed conservation rises.

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ver the last decade, green professionals, municipal governments, and conservation authorities have implemented design strategies, including rain gardens, bioswales, permeable pavements, and green roofs to mitigate flooding during peak events and limit the amount of nutrients and metals flowing into watersheds.

However, the general public remains uneducated on the topic.

If there’s going to be a paradigm shift, with consumers looking to the landscape profession for green infrastructure solutions for their homes and businesses, the industry needs to educate — and sell — their clients on the value of LID. “I think we are on the cusp of people really getting what LID and green infrastructure for water conservation and stormwater management is all about,” says Margaret Abernethy, landscape designer with Claremont, Ontario-based Cypress Hill Design and Build.

While there is a small segment of the population who are very environmentally conscious and who understand the value of LID, she says, the majority of consumers have no idea about how the runoff water on their property can impact the watershed in their communities.

WHAT IS LOW IMPACT DEVELOPMENT? Low Impact Development (LID) is a set of construction and landscape design strategies that mitigate the potential negative impacts of excess stormwater by managing runoff as close to its source as possible. In simple terms, it’s all about reducing the amount of impervious surfaces like concrete and asphalt where water can’t soak into the ground. LID practices often recreate natural or predevelopment hydrology (the way water moves) through the processes of infiltration, evapotranspiration, harvesting, filtration and detention of stormwater. LID often incorporates native plants, which are well adapted to the soils and climate conditions of their region and often require less maintenance, water, and fertilizer than many ornamental non-native plants.

LID designs work to remove nutrients, pathogens and metals from runoff, preventing pollutants from flowing into watersheds, lakes and rivers. The goal is to reduce the rate and amount of water running off of a property; with less water moving into watercourses from storm sewers, the risk of flooding (particularly during peak storm events) and stream bank erosion decreases,

Careful with language

and water quality is enhanced. LID also provides economic ben-

With those clients, “You need to be very judicious with the language you use; for example, a lot of people close off as soon as you use the term native plants. Particularly for small residential areas, some clients hear that word and they just shut right down. So you have to be mindful of the descriptors that you’re using when you’re working with someone who doesn’t have a lot of knowledge in the area.”

As a landscape professional who understands the importance of water management, Abernethy says it’s her responsibility to ensure that when a hard, impermeable surface is being installed on a

efits, as less runoff reduces the burden on municipal waste water systems. Treating, pumping and distributing water also uses a large amount of energy, resulting in greenhouse gas emissions and increased carbon footprints.

Examples of LID include: rain gardens, bioswales, downspout redirects, rainwater harvesting with barrels or tanks, porous or pervious pavement, green roofs, as well as soakaways and infiltration trenches.

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enough potable water. How can they possibly justify allowing people to use water to irrigate their gardens when the water has gone through so many different processes in order to clean it and make it suitable for drinking?”

It’s an expensive process for local governments, van Maris explains, and the problem is compounded by the fact we have so many hard, impermeable surfaces in our communities. The stormwater infrastructure is designed to send water directly into rivers and these systems are getting overloaded during heavy rain falls, resulting in costly backups and flooding.

Worse still, is the amount of pollutants and sediments that are moving through the system and ending up in the watershed, van Maris says.

Governments add impervious surface taxes

property, the water that used to infiltrate in that area needs to be infiltrated in some other way or some other area.

“I think we should all be doing LID types of applications regardless of whether a client asks for it or not,” says Abernethy. “As professionals, we should be managing the rainfall; we should be active leaders in that regard. When somebody calls us to put a patio in, it’s up to us to introduce water management principles. Over the next couple of years, I don’t expect that we are going to get a lot of calls from clients looking for that type of design, but we’re hopeful that if conservation authorities, governments, and trade associations continue to get the message out there, that will change and we will eventually see home owners coming to landscape professionals and asking for those types of projects.”

The tides are turning

Anna van Maris of Parklane Nurseries in Beaverton, Ont. has been a leader in promoting LID practices and environmental stewardship through numerous public projects and demonstrations at Canada Blooms.

With a passion for the environment and an educational background in environmental studies, van Maris has focused her family business towards green LID and eco-friendly practices over the last 12 years.

“When I was in school, I was taught to take water and get it off the property as fast as possible,” recalls van Maris. “I’ve since learned that was a mistake; that’s absolutely the wrong mentality to have when designing a landscape.”

She adds, “Municipalities are realizing that we need to reduce water consumption because they’re running out of potable water.

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Municipalities like Waterloo Region in Ontario and the City of Victoria in British Columbia have recently implemented measures to tax property owners based on the square footage of impermeable surfaces on their property, in an effort to encourage LID and recoup some of the costs of managing the water infrastructure.

Impervious surface taxes could spur consumer demand for LID landscaping. However, van Maris argues that green professionals shouldn’t move towards environmental practices simply to make money.

“As landscapers, we are poised to do more than most to improve the planet,” she says. “We are in the industry of being stewards of the land; we are supposed to be taking this seriously.”

There are already plenty of homeowners looking for landscapers who genuinely care about the environment, she adds.

“There are people out there who want to do their part to protect the environment and the water in their communities; we are attracting them. We’ve been finding ways to keep water on our client’s properties since before rain gardens even had a name.”

Like Abernethy, van Maris is careful about how she explains rain gardens and native plantings to her clients.

“At first we were putting rain gardens and native plants in without even telling our clients we were doing it,” she recalls. “We did it because it was the right thing to do. We’d convince them to use Rudbeckia for example, because it’s a beautiful yellow flower, not by preaching that it’s native.”

It’s not about being sneaky or tricking clients, Abernethy and van Maris each stressed. Rather, they find ways to emphasize the benefits of rain gardens and native plantings without proselytizing.

The language you use is critical.

“You don’t want to come across like you’re wagging your finger at them,” says Abernethy. “Just talking about these ideas and being genuine and passionate can go a long way in selling it to a homeowner. You don’t have to lecture people; you can just bring it into the conversation casually. We tend to start in the house with clients, and then we bring them outside because they get much more engaged when they’re outside. And then it’s easier to point out areas where there may be drainage problems and say, ‘you know, there is a really great way to look after this, and one of your needs and wants

FREE LIFE CYCLE ANALYSIS TOOL NOW AVAILABLE While the initial costs of LID are often higher than traditional designs, research shows lower maintenance costs make LID more economical over the life of a project. The Canadian Nursery Landscape Association (CNLA) recently commissioned a report “Life Cycle Cost Analysis of Stormwater Management Methods”

by William Marshall of Equilibrium Engineering to evaluate and compare the long term costs of LID and traditional designs.

“In almost every case these sustainable, low impact designs were cost effective over the life of the project compared to traditional pave and convey away methods, while also providing additional environmental and social benefits,” the report states.

“Average annual maintenance costs were consistently lower than the traditional techniques, which often required significant material removal as part of their rehabilitation, unlike the more durable natural designs.”

CNLA has made the report available “as a tool to assist landscape architects, landscape designers, landscape contractors, growers and retailers to confidently sell their products and services as the environmental alternative by quantifying that product’s cost, contributions and requirements over its lifecycle. As the landscape horticulture industry responds to climate change issues with landscape solutions, knowing what our product is worth, understanding how it contributes, and communicating what it requires to live and work as living systems and natural solutions is essential for every member in every sector.”

The report is available at http://gfl.me/h3EO.

is low maintenance gardening, so we can find a rain garden solution that can work toward both your needs and wants.’

“I can tell pretty quickly whether the person is more concerned about their own needs and wants, than the environment. So when I introduce LID or infiltration capacity, we can emphasize that it will save their foundation, or it will be beneficial for the environment.

There is a challenge there, when it comes to talking about the added costs of dealing with the water, but we describe it as an important part of the structure.”

She adds, “We tell clients, even if we know they aren’t going to go for it, that these are things that we are passionate about as green professionals and that we want to make sure that everything we do is responsible.”

Going forward, it’s clear it will take a combination of financial incentive and environmental altruism on the part of consumers before spending patterns will shift. However, with the right approach, it’s possible to incorporate elements of LID into residential projects and to get clients engaged in water conservation. As Abernethy and van Maris demonstrate, it’s not only the right thing to do, but its great business, too.

SCOTT BARBER

d v c w y c i o h y t

is Assistant Editor for Landscape Trades,

Landscape Ontario's horticultural trade publication.

W april 18

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NEW PLANT FORUM

2018 NORTHERN GREEN: JANUARY 3, 2018 The New Plant Forum is an educational session that was developed for Northern Green to highlight and bring attention to new plant cultivars for landscapes and gardens in the Upper Midwest. * Please Note: Plants protected by a plant patent or trademark may not be propagated without a license from the originator/introducer.

JOSH LYNN // BAILEY NURSERIES, INC. Ligustrum vulgare ‘Swift’ First Editions® Straight Talk™ Privet Origin: Mike Jeronimus, Green Acres Nursery, Golden, Colorado USDA Cold Hardiness Zone: 4–8 Height and Spread: 12' × 2' Availability: Bailey Nurseries and any First Editions network grower Propagation method: hardwoods and softwood cuttings The perfect replacement for columnar buckthorn in northern landscapes! Only 2' wide and tightly upright. Can be used as a vertical accent or grouped for hedging. Tolerates a wide range of soils and urban conditions. Can be pruned into a low hedge. Deer resistant.

Cornus alba ‘ByBoughen’ PP27,956 First Editions® Neon Burst™ Dogwood Origin: Ron Boughen, Valley River, Manitoba Canada USDA Cold Hardiness Zone: 3–7 Height and Spread: 4–5' × 4–5' Availability: Bylands Nurseries, Bailey Nurseries and many First Editions® network growers Propagation method: softwood cuttings Neon Burst™ is a more compact and smaller than other golden colored dogwoods. The foliage is an explosion of neon yellow and green colors. It has impressive heat tolerance and retains rich foliage throughout the growing season. In fall, the leaves turn a variety of soft tones of purple, red, yellow and orange plus the glossy, scarlet-red branches.

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➾ NE S E CT W IPLAN O N TITLE T FORUM

SUZETTE NORDSTROM // MONROVIA GROWERS Hydrangea macrophylla ‘Horthamp’ PPAF Seaside Serenade® Hamptons hydrangea Origin: bred by Kolster BV in the Netherlands USDA Cold Hardiness Zone: 4–9 Height and Spread: 3.5' × 3' Availability: Monrovia Propagation: softwoods Larger than life ball-shaped blooms that are comprised of many serrated florets. A reblooming tetraploid. Leather-like foliage, tough, thick stems, long-lasting blooms. Part shade.

Physocarpus opulifolius ‘Hoogi021' PPAF Little Joker® ninebark Origin: bred in the Netherlands USDA Cold Hardiness Zone: 4–8 Height and Spread: 4' × 3' Availability: Monrovia Propagation: softwoods Compact ninebark with fine and deeply incised, burgundy-purple leaves. Won the Silver medal at the Plantarium show in Holland in 2016. Well branched, compact. Full sun to part shade

Potentilla fruticosa ‘SMPFMY’ PPAF CheeseHead™ potentilla Origin: USDA Cold Hardiness Zone: 3–9 Height and Spread: 2' × 2' Availability: Monrovia Propagation: softwoods Finely textured, dark green foliage with an abundance of big yellow flowers from spring to late summer. Neat compact habit, deer and rabbit resistant. Full sun.

DAN HEIMS // TERRA NOVA NURSERY Begonia COCOA ‘Enchanted Moonlight’ Origin: bred by Chuck Pavlich at Terra Nova Nurseries USDA Cold Hardiness Zone: 8–11 (annual in Minnesota) Height and Spread: 24" × 14" Availability: plugs through Terra Nova Nurseries, finished through many bedding plant growers Propagation: TC Large, white, Hibiscus-like flowers in clusters contrast beautifully with the dark cocoa brown foliage. An elegant look with an upright habit to 2' tall. Use in mixed containers for shade, as a houseplant, or in your shade borders. Blooms continuously. http://www.terranovanurseries.com/growers/begoniacocoaenchantedmoonlight-p-817.html

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Begonia DAYSTAR ‘Hot Coral’ Origin: bred by Chuck Pavlich at Terra Nova Nurseries USDA Cold Hardiness Zone: 9–11 (annual in Minnesota) Height and Spread: 24" × 16" Availability: plugs through Terra Nova Nurseries, finished through many bedding plant growers Propagation: TC This lushly beautiful, trailing begonia has large hot coral flowers on continuous display. The flowers are well set off with the dark and patterned foliage. Good for hanging baskets. http://www.terranovanurseries.com/growers/begoniadaystarhotcoral-p-848.html

Coleus TERRA NOVA® ’Maharaja’ Origin: bred by Chuck Pavlich at Terra Nova Nurseries USDA Cold Hardiness Zone: 10–11 (annual in Minnesota) Height and Spread: 12" × 30" Availability: plugs through Terra Nova Nurseries, finished through many bedding plant growers Propagation: TC This coleus is a vigorous spreader. It has leaves of a deep red burgundy with a slight gold edge. It is a multipurpose plant that is great for hanging baskets, groundcovers and large mixed containers. Self-branching. http://www.terranovanurseries.com/growers/coleusterranovamaharaja-p-830.html

DR. TODD WEST // NORTH DAKOTA STATE UNIV., NDSU WOODY PLANT IMPROVEMENT PROGRAM (WPIP) Cercis canadensis ‘Pink Trim’ Northern Herald® Eastern Redbud Origin: Open Pollinated Seedling USDA Cold Hardiness Zone 4–8 Height and Spread: 20' × 15' Availability: J. Frank Schmidt Propagation method: Bud grafting Eastern redbud is not reliably hardy in USDA cold hardiness zone 4. Northern Herald® has successfully extended the hardiness range into zone 4. Northern Herald® has distinct deep green leathery leaves which are of higher quality as compared to other redbud cultivars.

Northern Herald® is quite floriferous with rose-purple flowers clusters emerging in early spring all along the stems. Flowers at a young age. Northern Herald® is soil tolerant including clay soils and high pH. It is an outstanding small tree for light shade in the landscape.

Acer pseudosieboldianum ‘KorDak’ Northern Spotlight® Korean Maple Origin: open pollinated seedling USDA Cold Hardiness Zone: 3–7 Height and Spread: 15' × 15' Availability: Iseli Nursery Propagation method: bud grafting Northern Spotlight® is the hardiest of all the Korean maple cultivars or hybrids and the perfect substitute for Japanese maples in zones 3 and 4. It has survived in excess of -40˚F winter temperatures with no damage or winter dieback. Summer foliage is medium green and has been resistant to summer leaf scorch and tip burn generally caused by winds, high temperatures, and low humidity. Northern Spotlight® has outstanding orange to orange-red fall colors. Foliage is retained throughout the winter months, dropping as bud break occurs in spring.

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Buying Show & Hort Academy

Tessman Company

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Visit the Tessman Buying Show & Hort Academy to take advantage of our Show Specials and Dating. Your Hometown Team is ready to help you with all of your Greenhouse, Nursery, Garden Center and Landscaping needs!

August 7, 2018

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2400 Mystic Lake Blvd Prior Lake, MN 55372 8 a.m. – 5 p.m.

• Best terms in the industry • New product lines • Educational seminars • Best prices of the season • More than 50 vendors • Travel allowance • Expert speakers • Detailed product information • Breakfast – Lunch Buffet – Adult Beverages • Monday evening Social with vendors

RSVP by Monday, July 30 to Bev Reiten or Gail Krull Phone: (651) 487-3850 Fax: (651) 487-3115 Email Bev: breiten@tessmanseed.com Email Gail: gkrull@tessmanseed.com

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KENDALL KLAUS // KLAUS NURSERIES Populus ‘Select’ Summer Shimmer™ Poplar Origin: discovered at Klaus Nurseries USDA Cold Hardiness Zone: 3 Height and Spread: 60–70' × 20–30' Availability: Klaus Nurseries, Robinson Nursery, Bailey Nurseries Propagation method: budded onto Populus tremuloides An interspecific cross discovered by Kendall believed to have both quaking aspen and cottonwood in its parentage. It is an upright oval tree with lovely foliage, beautiful white bark and the sound of quaking aspen.

JONATHAN PEDERSON // MONROVIA GROWERS Leucanthemum ’14-05' PPAF Creampuff shasta daisy Origin: USDA Cold Hardiness Zone: 4–9 Height and Spread: 18" × 18" Availability: Monrovia Propagation method: vegetative Blooming in late spring and summer with lots of double flowers with a dark yellow eye and light yellow petals. Plant in full sun.

Petunia Ray Pistachio Cream Origin: Danziger USDA Cold Hardiness Zone: annual Height and Spread: Availability: Monrovia Propagation method: vegetative Mounding habit that holds up to summer heat. Unusual flowers of cream, chartreuse and lime are eye-popping. Great for baskets or patio pots.

Helianthus ‘Brown Eyed Beauty’ PPAF Sunbelieveable™ sunflower Origin: Thompson & Morgan USDA Cold Hardiness Zone: annual Height and Spread: 30" x 30" Availability: Monrovia Propagation method: vegetative Compact, mounding habit with flowers all summer long because it does not set seed. Lovely bicolor flowers of gold and red.

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JAYNE ROBERTS // ROBERTS HORTICULTURAL Baptisia ‘American Goldfinch’ PPAF American Goldfinch False Indigo Origin: bred at Walters Gardens USDA Cold Hardiness Zone: 4–9 Height and Spread: 3–3.5' × 4.5–5' Availability: Walters Gardens Propagation method: cuttings Nothing says American like this big, bold, and beautiful native cultivar, which will make a dramatic statement in your garden come late spring. Gorgeous, golden yellow flower spikes rise up above its wide habit. This is one of the most floriferous Baptisia we offer, producing loads of brightly colored spikes for many weeks. After the blooming season, ‘American Goldfinch’ produces attractive round seed pods in the fall. This is the perfect specimen for filling in a large space in your garden or for mass plantings in landscapes

Pulmonaria ‘Twinkle Toes’ PPAF Twinkle Toes Lungwort Origin: bred at Walters Gardens USDA Cold Hardiness Zone: 3–9 Height and Spread: 12–14" × 16–18" Availability: Walters Gardens Propagation method: tissue culture × This beautiful shade perennial will make you dance with its impressive spring flowers and unique foliage. Starting in mid-spring dainty light periwinkle blue flowers cover a low, mounded habit. After the flowers fade, you can enjoy its dark green leaves that are lightly sprinkled with silver. This plant will thrive in part shade to full shade as long as you provide moisture.

Pulmonaria is an underused perennial that grows well in shady gardens. It is especially attractive when planted among hostas, ferns, and brunneras.

Panicum ‘Cape Breeze’ PP24,895 Cape Breeze Switchgrass Origin: introduced by North Creek Nurseries USDA Cold Hardiness Zone: 4–9 Height and Spread: 24–30" × 20–24" Availability: North Creek Nurseries Propagation method: division Fantastic foliage stays green until Halloween! From production to the landscape, this grass truly is a breeze. Selected for upright habit, compact size and early flowering. Its’ perfect, tidy stature combines the toughness of seaside Panicum with the neatness of garden worthy cultivars. Great texture and movement in the landscape!

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CASEY RUFENER // MCKAY NURSERY CO. Gymnocladus dioicus ‘McKBranched’ PPAF Decaf™ Kentucky Coffeetree Origin: McKay Nursery chance seedling USDA Hardiness Zone: 3 Height and Spread: 50' × 40' Availability: McKay Nursery and various liner producers Propagation method: chip budding Decaf™ Kentucky Coffeetree is a Kentucky Coffeetree that exhibits much greater branching than the species. This native cultivar consistently produces buds and branches from new growth leading to a well branched tree at a young age. New growth is finer texture in branches, twigs, and leaflets than the species while emerging leaflets show a caramel coloration into early summer.

Decaf™ produces only male flowers and has not shown the tendency to fruit.

STEVE KELLEY // KELLEY AND KELLEY NURSERY Anemone Fantasy™’Pocahontas’ PP25,325 Pocahontas Anemone Origin: bred by Yoshihiro Kanazawa from Japan and introduced in the United States through Plants Nouveau USDA Cold Hardiness Zone: 5–8, has been hardy in the Kelley garden Height and Spread: 12–18" × 18–24" Availability: Creek Hill, Monrovia, North Creek Propagation method: tissue culture and division Covered in bright pink double flowers from July–September. The seed heads look like small fluffy cotton balls giving interest in the fall. Delightful in the garden or a mixed container. Grows best in full sun and moist but well drained soils

Anemone Fantasy™’Cinderella’ PP25367 Cinderella Anemone Origin: bred by Yoshihiro Kanazawa from Japan and introduced in the United States through Plants Nouveau USDA Hardiness Zone: 5–8 Height and Spread: 12–18" × 18–24" Availability: Creek Hill, Monrovia, North Creek Propagation method: tissue culture and division Covered in baby pink single flowers from July–September. Delightful in the garden or a mixed container. Grows best in full sun and moist but well drained soils.

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DEBBIE LONNEE // BAILEY NURSERIES, INC. Prunus ‘P002S’ PP25,767 Sucker Punch® Chokecherry Origin: Fort Collins Nursery, Colorado USDA Cold Hardiness Zone: 3-8 Height and Spread: 20–30' × 18–20' Availability: Bailey Nurseries, Inc., many Colorado Plant Select nurseries Propagation method: softwood cuttings (own-root) Unlike most chokecherries, Sucker Punch® is a selection that doesn’t sucker, making it desirable for use in many landscape settings where a tidy ornamental tree is needed. Its leaves emerge green in spring and then turn a deep, reddish-purple. Multi-season interest begins with lovely clusters of white blossoms in spring, yielding edible blue-black fruits that attract songbirds in late summer. Introduced through the Colorado Plant Select program.

Syringa ‘Bailbridget’ PPAF First Editions® Virtual Violet™ Lilac Origin: bred by Don Selinger at Bailey Nurseries USDA Cold Hardiness Zone: 3–7 Height and Spread: 6–8 × 5–7' Availability: Bailey Nurseries Inc and many First Editions network growers Propagation method: softwood cuttings With shiny violet new leaves, deep purple stems, raspberry-purple buds and fragrant violet flowers, Virtual Violet™ is aptly named. Leaf petioles remain violet well early into the summer.

The habit is upright instead of rounded and compact. The dense habit makes it a great choice for a hedge in smaller spaces as well as a welcome addition to foundation plantings. Remarkably mildew free. This is a controlled cross between Charles Joly and two outstanding National Arboretum varieties.

Clematis ‘Evipo069' PPAF Tekla™ Garland® Clematis Origin: bred by Raymond Evison at Guernsey Clematis Nursery USDA Cold Hardiness Zone: 4–9 Height and Spread: 4–5' × 2–3' (spread can be variable depending on support) Availability: Bailey Nurseries, Willoway Nursery, Propagation method: softwood cuttings This compact clematis is bushy in habit, but will grow up to 5 feet in height. Reddish-pink flowers have a slightly lighter band in the center. Best used in small gardens and containers.

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MIKE HEGER // AMBERGATE CONSULTING Andropogon gerardii ‘Blackhawks’ PP27,949 Blackhawks big bluestem Origin: bred by Brent Horvath at Intrinsic Perennials, Illinois USDA Cold Hardiness Zone: 3–9 Height and Spread: 4–5' × 1–2' Availability: Intrinsic Perennials, Emerald Coast, Green Value, Gertens Propagation method: divisions ‘Blackhawks’ is a recently introduced cultivar of our native Big Bluestem that originated as a seedling of ‘Red October’. It is distinguished by its strong upright habit and dark green foliage that starts taking on purplish tones in mid-summer. ‘Blackhawks’ blooms in late summer with burgundy-red flowers. By mid to late fall, cool nights lead to the entire plant, including seed heads, turning near black-purple. Grass selections exhibiting these tones are often somewhat lacking in vigor due to reduced chlorophyll but, to date, ‘Blackhawks’ appears to be a much stronger grower. Selected and introduced by Brent Horvath of Intrinsic Perennial Gardens.

Echinacea ‘TNECHKIO’ PPAF, Echinacea TNECHKR’ PPAF Kismet™ series of coneflowers, Kismet Intense Orange™ and Kismet™ Raspberry Origin: Terra Nova Nurseries USDA Cold Hardiness Zone: 4–10 Height and Spread: 1½' × 2' Availability: Terra Nova Nurseries Propagation method: Tissue Culture This series (which there are now four members of) appears to be a real step forward in Echinacea breeding. The crux of these breeding efforts is interspecific hybridizing to achieve higher crown count leading to a greater number of flowers, longer bloom season and enhanced winter survival. To date, I have observed and grown the two shown here and have been highly impressed. ‘TNECHKIO’ Kismet™ Intense Orange — USPPAF forms an upright mound and is smothered with intense orange, 4½" blooms for an extended period. As the blooms age, they fade in intensity but still remain attractive and are pleasing in combination with newly emerging flowers. ‘TNECHKR’ Kismet™ Raspberry — USPPAF has a similar habit, flower size and bloom period but its flowers are a most pleasing raspberry color. With an early start, both of these should produce some flowers the first year. Both varieties had 100% survival after the 2016–17 winter in Steve Poppe’s trials at the U of M West Central Research and Outreach Center in Morris, MN.

BRENDA WICKENHAUSER // BAILEY NURSERIES, INC. Hydrangea paniculata ‘Renba’ PPAF First Editions® Berry White™ Hydrangea Origin: bred by Jean Renault in Gorron, France USDA Cold Hardiness Zone: 3–8 Height and Spread: 6–7' × 4–5' Availability: summer 2018 from Bailey Nurseries and other First Editions network growers Propagation method: softwood cuttings Berry White has strong, upright stems and large cone-shaped flower panicles that stay upright and do not flop. Blooming in mid to late summer, the flowers emerge white but then start to take on tones of pink and then darker pink, almost red, especially when summer night time temperatures are cooler.

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Rosa rugosa ‘BOC rogosnif’ PP22,570 First Editions® Lotty’s Love™ Rose Origin: bred by Chuck Bock USDA Cold Hardiness Zone: 3-10 Height and Spread: 3–3.5' × 3.5–4' Availability: summer 2018 from Bailey Nurseries Propagation method: softwood cuttings Lotty’s Love is a hybrid rugosa with a strong cinnamon fragrance emanating from its large semi double 4–5" flowers that bloom through the season. The color of this rose has been described as mauve or beetroot purple, suffused with magenta as each flower matures. The eye is streaked with white and it boasts golden yellow stamens that contrast nicely with the petals. Like the species, the foliage is a dark green and glossy, it’s resistant to the common fungal diseases and it has a nice upright and bushy habit.

Clematis ‘Evipo024' PP15,156 Picardy™ Tudor Patio® Clematis Origin: bred by Raymond Evison from Guerney Clematis Co USDA Cold Hardiness Zone: 4–9 Height and Spread: 4' tall by variable spread Availability: Bailey Nurseries Propagation method: softwoods This compact and free-flowering clematis has magenta blooms with brighter red bars. It is ideal for the deck, patio, outdoor dining area and outstanding when grown in a hanging basket.

It produces its first flowers on short stems. As these are flowering, it is already producing trailing stems which provide more flowers. Once it has finished its first flowering, it may be pruned back to 6" and it will regrow and flower again if kept well-watered and fed.

ALISHA ASLESON // BFG Supertunia® Lovie Dovie™ Origin: Proven Winners annuals USDA Cold Hardiness: annual Height and Spread: 6–12" × 18–24" Availability: PW growers Propagation method: softwoods Blooming non-stop through the summer with white and pink bicolor ‘star’ patterned flowers, this petunia can tolerate part sun to full sun, and is very low maintenance. The plant can tolerate a medium amount of water and thrives in fertile soil. First to move outside in the spring.

Hypoestes phyllostachya Hippo™ Red Polka Dot Plant Origin: Proven Winners annuals USDA Cold Hardiness Zone: annual Height and Spread: 16–22" × 8–14" Availability: PW growers Propagation method: softwoods I had this plant this summer and LOVED it. I love to use my plants throughout multiple seasons and this plant was great. I used it in my summer plantings and it works great for shade. I love Courtesy of Proven Winners — www.provenwinners.com.

being able to plant pops of color in shaded areas. For my fall planters, I paired it with my mums and kale. It looked great and lasted until the first hard frost. The coloring on the foliage adds great interest and I love how the upright habit to add height in my pots.

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DAN HEIMS // TERRA NOVA NURSERIES Agastache ‘Morello’ Morello hummingbird mint Origin: bred by Janet Egger at Terra Nova Nurseries USDA Cold Hardiness Zone: 5-10 Height and Spread: 27" × 22" Availability: plugs through Terra Nova Nurseries Propagation: TC Amazingly huge, dense inflorescences of deep burgundy rose that bloom from spring through fall. Showy, dark foliage in cool temperatures extend the beauty. Strongly upright habit that forms multiple crowns quickly. Good mildew tolerance. Loved by bees and hummingbirds. http://www.terranovanurseries.com/growers/agastachemorello-p-858.html

Heuchera FOREVER™ ‘Red’ Forever Red coral bells Origin: bred by Janet Egger at Terra Nova Nurseries bred by Dan Heims USDA Cold Hardiness Zone: 4–9 Height and Spread: 7" × 14" Availability: plugs through Terra Nova Nurseries Propagation: TC This lovely, fast growing Heuchera has the reddest leaves ever, a great crown, and it is a vigorous grower. The leaves are cut and somewhat ruffled and reddest in the spring and fall when the temperatures are cooler. The 14" spikes with white flowers in mid-summer compliment and contrast with the foliage. http://www.terranovanurseries.com/growers/ heucheraforeverred-p-889.html

Heuchera NORTHERN EXPOSURE™ ‘Silver’ Northern Exposure Silver coral bells Origin: bred by Janet Egger at Terra Nova Nurseries USDA Cold Hardiness Zone: 3–9 Height and Spread: 13" x 16" Availability: plugs through Terra Nova Nurseries Propagation: TC A great landscape plant from Heuchera richardsonii breeding (making it more cold tolerant).

It forms a dense, rounded mound with burgundy-silver to silver leaves. Excellent rust resistance. http://www.terranovanurseries.com/growers/heucheranorthernexposuresilver-p-890.html

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➾ N E W P L A N T F O RU M

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Hydrangea arborescens ‘NCHA8' PPAF Invincibelle Limetta™ Hydrangea Origin: bred by Dr Tom Ranney at NCSU Adding Variable Frequency Drives (VFDs) to water well pumping systems can increase efficiency and lower operating costs.

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USDA Cold Hardiness Zone: 3–9 Height and Spread: 2.5'–3' × 2.5–3' Availability: Spring Meadow Nursery and most PWCC growers Propagation method: softwoods This revolutionary new variety offers a dwarf habit with lush green flowers and very strong stems. Blooms start out a rich jade

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green, soften to green-white, then age to green again. This strong rebloomer keeps fresh flowers coming through frost, too. This versatile, reliable native plant will appeal to landscape designers and homeowners alike.

Courtesy of Proven Winners — www.provenwinners.com.

Hydrangea arborescens ‘NCHA7' PPAF Invincibelle Mini Mauvette™ Hydrangea Origin: bred by Dr Tom Ranney at NCSU

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USDA Cold Hardiness Zone: 3–9 Height and Spread: 2.5–3' × 2.5–3' Availability: Spring Meadow Nursery and most PWCC growers Propagation method: softwoods This hydrangea brings a never-before-seen color to the species, with large mophead flowers in a deep mauve-violet. Blooms are held on very strong stems and appear early

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summer through fall. A dwarf habit gives this native plant amazing versatility in the landscape and the garden.

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Hydrangea arborescens ‘NCHA5' PPAF Invincibelle Wee White™ Hydrangea Origin: bred by Dr Tom Ranney at NCSU USDA Cold Hardiness Zone: 3–9 Height and Spread: 1–2.5' × 1–2.5' Availability: Spring Meadow Nursery and most PWCC growers Propagation method: softwoods This smooth hydrangea has the potential to revolutionize landscaping. Its sturdy compact frame reaches just 1–2.5' tall and is covered in pure white mophead flowers from summer to fall.

Courtesy of Proven Winners — www.provenwinners.com.

The blooms start white and age to shades of green and pink - and they keep coming, with fresh buds being produced through autumn.

Spiraea japonica ‘NCSX1' PPAF Double Play® Candy Corn™ Spirea Origin: bred by Dr Tom Ranney at NCSU USDA Cold Hardiness Zone: 4–9 Height and Spread: 1.5–2.5' × 1.5–2.5' Availability: Spring Meadow Nursery and most PWCC growers Propagation method: softwoods You have to see it to believe it! Candy-apple red foliage starts the show in spring. As the season progresses, the foliage transforms to pineapple yellow. Dark purple blooms appear in Courtesy of Proven Winners — www.provenwinners.com.

late spring, making this the most eye-poppingly colorful Double Play spirea yet.

MATT CLARK // ASSISTANT PROFESSOR, GRAPE BREEDING AND ENOLOGY, UNIVERSITY OF MINNESOTA Vitex ‘Itasca’ PPAF Itasca grape Origin: bred at the University of Minnesota USDA Cold Hardiness Zone: 4 Availability: Double A Vineyards, Northeastern Vine Supply, and Winter Haven Propagation method: vegetative Released in 2017, Itasca is an exciting new white wine variety that can make an excellent dry white wine with flavors of pear, melon and notes of honey. Much lower acidity than other U of MN grape cultivars. Brix ~24–28; pH 3.17; and acidity ~10 g/l. Ripens around September 20–24.

Excellent vine all around, is both cold hardy and disease resistant. Performed well in 2014 which was a very poor year for grapes in Minnesota.

ARLA CARMICHIEL // THREE RIVERS PARK DISTRICT Carex appalachica Appalachian sedge Origin: native to eastern North America USDA Hardiness Zone: 3–8 Height and Spread: 8" × 10" Availability: Hoffman Nursery, North Creek Propagation method: seed and division This small clumping sedge makes a lovely ground cover in dry shade. The fine texture and bright green foliage makes this sedge a nice addition to containers and in the shady border along a path.

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STEVE POPPE // UNIVERSITY OF MORRIS-TRIAL GARDENS Begonia Megawatt™ Rose Bronze Leaf Origin: PanAmerican Seed Co USDA Cold Hardiness Zone: annual Height and Spread: 20–28" × 16–24" Availability: through many bedding plant growers, seed from PanAm Propagation method: seed Begonia Megawatt™ Rose Bronze Leaf offers striking, non-stop flowers which keep plants covered in huge color throughout the summer with no deadheading. Has sturdy flower stems that hold flowers above the lush foliage. Perfect plant for landscapes, hanging baskets and big containers.

Coleus Main Street Michigan Avenue Origin: Dummen Orange USDA Cold Hardiness Zone: annual Height and Spread: 24–30" × 18–24" Availability: through Dummen Orange and other bedding plant growers Propagation method: softwood cuttings Coleus Main Street Michigan Avenue is a high impact vigorous coleus that held its variegated foliage color throughout the growing season. Michigan Avenue was easy to grow, very uniform in growth and performs equally well in sun or shade. It’s also a perfect complement to other plants in the landscape.

Zinnia Magellan™ Orange Origin: Syngenta USDA Cold Hardiness Zone: annual Height and Spread: 12–18" × 10–12" Availability: seed houses and bedding plant growers Propagation method: seed Zinnia Magellan™ Orange is a very easy to grow zinnia that grows about 12–18" tall with large abundant fully double orange blooms all summer long. Magellan Orange is a vigorous variety with good disease tolerance and is well suited to challenging weather conditions. Occasional deadheading the old flowers will keep new buds coming, and you’ll get even more color. For a complete list of all trial results, please refer to www.wcroc.cfans.umn.edu/flower-research-results

JESSE ANDERSON // GARDENWORLD Astilbe chinensis ‘Vision Inferno’ PP26,012 Vision Inferno Astilbe Origin: Future Plants USDA Cold Hardiness Zone: 3-8 Height and Spread: 15–24" × 15–20" Availability: Growing Colors (GardenWorld, Inc) Propagation: division Vision Inferno is a new addition from Future Plants to the already popular Vision series. It has broad upright growth habit with dense pink/white plumes. Strong pot presence, cut flower and garden performance make this a wonderful variety for our northern climate.

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➾ NE S E CT W IPLAN O N TITLE T FORUM

Heuchera ‘Plum Power’ PPAF Plum Power Coral Bells Origin: bred by Luc Klinkhamer, The Netherlands USDA Cold Hardiness Zone: 4–9 Height and Spread: 12–14" × 20" Availability: Concept Plants, Growing Colors (GardenWorld, Inc) Propagation: cuttings or tissue culture Heuchera Plum Power is a villosa hybrid. Plum Power is a real work horse — hot, cold, sun or shade, this Heuchera doesn’t mind. Foliage will change from burgundy red in spring to purple-pink with a touch of silver in summer. Very disease-tolerant and can be planted in any type of soil.

Phlox paniculata ‘Smokey’ PPPAF Smokey Garden Phlox Origin: bred by Verschoor, The Netherlands USDA Cold Hardiness Zone: 3–8 Height and Spread: 20–28" Availability: Growing Colors (GardenWorld, Inc) Propagation: softwood cuttings Smokey is a mid-summer blooming phlox with mauve bi-colored flowers. The violet-pink centers make Smokey unique. This selection has excellent disease resistance and will provide weeks of color in the garden.

TROY LEE // GREENLEAF NURSERY CO. Rosa ‘Meimacota’ PPAF The Grand Champion™ Rose Origin: bred by Meilland International USDA Cold Hardiness Zone: 5 Height and Spread: 4' × 4' Availability: Greenleaf Nursery and Garden Debut growers Propagation method: softwoods This rose seriously knows how to put on a show! Huge, dense blooms adorn dark, clean foliage from late spring through summer. It’s three inch double red blossoms will one-up any other shrub rose in the landscape. This variety creates trophy-worthy borders and performs flawlessly in garden beds as well. It’s clear to see The Grand Champion™ deserves a spot on your team.

Viburnum carlesii ‘J.N. Select 5' Sugar ‘n Spice™ Viburnum Origin: bred by Michael Yanny at Johnson’s Nursery in Wisconsin USDA Cold Hardiness Zone: 4 Height and Spread: 8' × 8' Availability: Greenleaf Nursery and other woody plant nurseries Propagation method: softwoods A heavy flowering cultivar with the same sweet-spiced floral fragrance for which the species is known. Petite white flower clusters are plentiful throughout spring. Grows to eight feet tall and eight feet wide. Excellent as a landscape specimen!

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➾ NE S E CT W IPLAN O N TITLE T FORUM

Diervilla lonicera ‘Grepofl’ Polar Flare™ Bush Honeysuckle Origin: selected by Greenleaf Nursery USDA Cold Hardiness Zone: 3 Height and Spread: 3–5' × 3–5' Availability: Greenleaf Nursery Propagation method: softwoods Lemon-yellow trumpet shaped flowers bloom along the branches in early summer. Foliage emerges a dark burgundy in spring and turns to a dark green. A multi-stemmed and rounded shrub, it grows 3–5' tall and 3–5' wide. Ideal for mass plantings.

ALEC CHARAIS // BAILEY NURSERIES, INC. Viburnum lentago ‘UMN870517' Homefree™ Nannyberry Origin: bred by Stan Hokanson and Steve McNamara at the University of Minnesota USDA Cold Hardiness Zone: 3–8 Height and Spread: 12–15' × 8–10' Availability: Bailey Nurseries, Inc Propagation method: softwood cuttings Selected by the University of Minnesota for its high disease resistance to powdery mildew.

In shrub form, Homefree™ is versatile and hardy. This native cultivar performs well in a variety of landscape settings including wet, dry, sun or shady locations. Spring flowers are a crisp white, and the blue-black fruits that follow attract birds and are edible. Fall colors include yellows,oranges, reds and purples. Use as a screen, hedge or for naturalizing. Can be pruned into a single stem small tree.

Physocarpus opulifolius ‘UMNHarpell’ PPAF First Editions® Fireside™ Ninebark Origin: bred at the Landscape Plant Development Center USDA Cold Hardiness Zone: 3–7 Height and Spread: 5–7' × 4–6' Availability: August 2018 launch Bailey Nurseries and other First Editions network growers Propagation method: softwoods Selected for the stunning foliage. Reddish new growth matures to deep red-purple foliage that holds its color reliably all summer without brownish tones. Resistant to powdery mildew. Not as fast growing as some other ninebarks and more moderate in size, great for foundation plantings or low, informal hedges. Bred at LPDC, managed now by University of Minnesota Landscape Arboretum and licensed to Bailey Nurseries for its First Edition program.

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➾ N E W P L A N T F O RU M

Hydrangea macrophylla ‘Bailmacfive’ PPAF Endless Summer® Summer Crush™ hydrangea Origin: bred at Bailey Innovations, Athens, Georgia USDA Cold Hardiness Zone: 4–9 Height and Spread: 18–36" × 18–36" Availability: spring 2019 launch, Bailey Nurseries and other Endless Summer network growers Propagation method: softwoods It’s not just about blue or pink anymore!

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➾ G OV E RN MEN T AFFAI R S

2018 Day on the Hill Is a HUGE Success!

Former House Speaker, Tip O’Neill used to remind his caucus, the voting public and anyone else he came across that “All Politics is Local.” Nowhere was that time-honored maxim more applicable than this year’s MNLA Day on the Hill!

Our day started “down the hill” — a bit differently from previous Days on the Hill, convening at the St. Paul Cedar Street Armory for breakfast, orientation and discussion of our top policy priorities at the 2018 legisLarry Johnson lature. These issues included our salt applicator liability Government Affairs Director bill (HF3577 /SF 3199 ), our proposed changes to the Minnesota Plumbing Code (HF 3214/ SF 2602), Uniform State Labor Standards, ending the “Duty to Defend,” and funding to fight Emerald Ash Borers in the state.

The group attendees — numbering fifty from around the state — marched up the hill from the armory to the legislative offices to meet with their State Representatives in the State Office Building and their State Senators in the brand-new Minnesota Senate Office Building. In total, our members met with or delivered packets of information to SEVENTY-ONE legislators — a new record for our association!

Throughout the day, members had a chance to educate their legislators on issues of importance, talk about

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other concerns from their business perspective, and begin or continue building connections with the leaders who make decisions that affect our industry every day.

Check out photos from the day on pages 12–13 of this issue of the The Scoop.

The 2018 Day on the Hill will go down as one of our biggest advocacy impacts on record thanks to the association members who took time out of their week to help us give a human local face to the issues the MNLA Government Affairs team has worked to advocate on for months. Our continued success on these issues depends completely on the participation and dedication of our members. We look forward to continuing ahead in advocating and working together to help impact our green industry in 2018 and beyond.

LARRY JOHNSON can

be reached at: larry@mnla.biz.

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➾ DON'T FORGET

UTILITY LOCATES IM PO RTAN T ADVI SO RY TO M E M BE RS

MNLA ADVISES ITS MEMBERS TO REMEMBER THE FOLLOWING: Anytime you are going to dig anywhere in a landscape, CALL BEFORE YOU DIG. In the metro area, call the Gopher State One Call at 651-454-0002 or, outside the metro, call toll-free 800-252-1166 at least 48 hours in advance of anticipated excavation. In the busy spring season, be aware that experience has shown that it can take even longer for markings to occur. You have 96 hours (4 days) to begin digging after the markings are placed. (Both the 48-hour rule and 96-hour rule exclude Saturdays, Sundays and holidays.)

After markings have been made, excavators are required to maintain a minimum horizontal (side to side) clearance of two feet (24 inches) between an unexposed facility and the cutting edge or point of any power operated excavating or earth-moving equipment. For example, if the markings indicate a 6" pipe is buried, the hand dig zone is 54" wide (6" + 24" on each side of the mark). If excavation is required within the hand dig zone, the excavation must be performed very carefully, with vacuum excavation or hand tools, and without damage to the facility or undermining lateral support. Remember that facility depths may vary due to installation practices, changes in the grade, erosion and other variables.

In the course of digging, if you expose a utility line, it is your responsibility to inspect and support the facilities before backfilling. If you damage the utility line, it is your responsibility to immediately notify the utility owner directly.

For a Professional Excavators Manual, call 651-454-8388 (do not call this number for locates) or see the website www.gopherstateonecall.org.

MNLA ALSO REMINDS MEMBERS OF THE FOLLOWING INFORMATION: Gopher State One Call now has a free mobile app, which offers quick access to many of Gopher State One Call’s resources from a smartphone or tablet, whether you’re at the office or working at a job site. The app is available for both Apple and Android devices. To download the free GSOC app, visit the Apple App Store or Google Play and search for “GSOC” or “Gopher State One Call.”

Minnesota Statutes section 326B.35 clearly identifies that communication utility work is covered by the National Electrical Safety Code (NESC). “Communication utility work” includes burial of telephone and cable TV lines. (Source: Minnesota Department of Labor & Industry Construction Codes and Licensing Division) National Electrical Safety Code table 352-1 requires communication cables to be installed at a 24" burial depth. A lesser depth is allowed if the cable is provided with supplemental protection.

If you cut a communications line during routine lawn work such as aeration, or if you have followed ALL of the utility marking procedures required, yet inadvertently cut a communications line that has not been properly buried, it may be a reasonable business practice to bill the offending utility for any inconvenience caused to you or your customer.

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➾ F S OU E CTNDATION I O N TITLECORN ER

WHY AM I IN HORTICULTURE? FELLOW HORTICULTURE PROFESSIONALS, HAVE YOU EVER ASKED YOURSELF THE QUESTION: WHY AM I IN HORTICULTURE? I’ve been in the industry contributing actively for 20

opportunity for success, satisfaction and financial reward for individuals that are willing to apply themselves to horticulture.

BFG Supply Co.

the rewards of being involved in Ag & Horticulture.

I have to be honest, horticulture was not my first

For many years, we relied on seasonal migrant work and will continue to do so. But as you know, every year it is more difficult to bring them over due to tighter

choice and I didn’t know any better until the last year of

immigration rules. I had my fair share of it as I was

my Agronomy undergrad. At that time, I got involved in

responsible for international programs with my previous

a research project growing tomato plants in a green-

employer. We need to promote potential careers, and

house. I tested the additional benefits of treating tomato

we need to start early. We need to invest in educational

plants with certain fungicides with the goal of keeping

programs that demonstrate what can be achieved in

taller varieties compact allowing them to be cultivated

horticulture. Each one of us can do more for the industry

indoors and obtain maximum yield. That was my first

and help to promote careers: we can share our stories,

exposure to horticulture, and I have been

we can volunteer time, we can coach young

involved since, now 23 years.

professionals, we can be mentors to the next

It has been a great journey and I truly be-

generation. Remember, we need to compete

lieve we need to know where we come from,

with many other industries and most of them

we need to value our experiences, and we

have climate controlled offices.

need to promote the industry and the career

One way to participate is by contributing

opportunities that it provides. But enough of

¼ of 1% of your purchases from participating

talking about a temporary summer job, let’s

industry suppliers, but in addition to the contri-

get serious and promote it as a true career where you can contribute on the business or the academic side. Horticulture is a vast field with opportunities to

bution you can go above and beyond and get involved with a little of your time.

The MNLA Foundation does a lot when it comes to

improve quality of life for many, the ones that work in the

career development and scholarships but together we

field and ultimately to our customers with products and

can do a lot more. Every day we can be horticulture

services making for better lives.

ambassadors in our neighborhoods, communities, busi-

In my travels, I see the labor scarcity of many different segments of our industry. Automation and mechanization

nesses, and social circles.

Contact the MNLA office if you would like to get

advancements were done over the years making us

involved. Instead of tomatoes, let’s cultivate new hort

productive and to make up for the lack of workers. What

professionals!

I don’t see is the same level of investment on careers and

april 18 18 april

an individual can have within our industry. There is

my entire life. Coming from a family of farmers from Ivan Izzo

MNLA .biz MNLA .biz

training and education and a clear vision of the path that

years in the U.S. and have been involved in agriculture southern Brazil I learned early in life the hard work and

62 62

needs more people involved at all levels with proper

It’s April and I know for sure all of you are running at 100

development of the new generation of workers,

miles an hour.

supervisors, managers, and potential CEO’s. Our industry

THANKS FOR YOUR TIME AND HAVE A GREAT SEASON!

MNLA FOUNDATION Improving the Environment by Investing in Research and Education

1813 LEXINGTON AVE. N | ROSEVILLE, MN 55113 | 651-633-4987 | FAX 651-633-4986 | MNLA@MNLA.BIZ | WWW.MNLAFOUNDATION.COM

PARTNERS FUND You are encouraged to participate in the Research & Education Partners Fund at one of the participating suppliers recognized below. Your voluntary donation of ¼ of 1% (0.25%) on purchases of plants and other nursery, greenhouse and landscape products at these suppliers is used by the MNLA Foundation to grow a brighter future for the industry.

On an invoice totaling $1,000 at one of these suppliers, your contribution will be only $2.50. Your individual contribution is small, but collectively these small contributions will add up to make a real difference!

WHOLESALE NURSERY & HARDSCAPES

YOUR TRUSTED PARTNER

Research for the Real World

Career Development & Promotion

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L A N D S C A P E + M A S O N RY

Scholarships

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