Holden Forests & Gardens - Winter 2022-23

Page 1

WINTER 2022–23, V7/1

Forests & Gardens is the member magazine for Holden Forests & Gardens, which includes the Holden Arboretum in Kirtland and the Cleveland Botanical Garden in Cleveland.

MISSION: Holden Forests & Gardens connects people with the wonder, beauty, and value of trees and plants, to inspire action for healthy communities

VISION: All communities transformed into vibrant places where trees, plants, and people thrive

Creative Director: Jackie Klisuric Editor & Vice President of Public Relations & Marketing: Margaret Thresher

Photography: Anna Funk, Ethan Johnson, Jackie Klisuric, Tom Masaveg, Dale McDonald, Connor Ryan, Margaret Thresher


Tom Anderson, Chairman

Rob Galloway, Secretary

Constance Norweb

Abbey Paul R. Abbey

Victoria U. Broer

Barbara Brown, PhD

Tera N. Coleman

Jonathan Dick

Paul E. DiCorleto, PhD

Michael Dingeldein, MD

Lavita W. Ewing

Kate Faust

Lynn-Ann Gries Sally Gries

Joseph P. Keithley

Stephen J. Knerly, Jr. Joseph J. Mahovlic

Michael C. Marino

Roy D. Minoff

Cynthia Moore-Hardy Ellen W. Jones Nordell

Deidrea Otts

Jane Q. Outcalt

Katie Outcalt

Gary W. Poth

Erin Kennedy Ryan

Robin Schachat

Lynn Shiverick

Ruth M. Stafford

Charles Walton

Joy K. Ward, PhD



MEMBER Q&A: TOP SPOTS Find out some of the favorite places to visit this winter 4

TWINKLE IN THE 216 Celebrate the holiday season at the Cleveland Botanical Garden 6

NO BAD WEATHER Find out how you can get out and explore the beauty around you, especially at the Holden Arboretum 10

CONSERVING OUR PLANTS Sharing global lessons for how we can help our gardens grow 13


The Great Lakes Basin Forest Health Collaborative, based at Holden Arboretum, is leading an effort to save our trees 16


INTRODUCING Q&A Meet Beth Kelly, the director of guest experience . . . . . . 20

©Holden Forests & Gardens

Forests & Gardens (ISSN 2474-6371) is a class and events magazine published quarterly by Holden Forests & Gar dens, 9500 Sperry Road, Kirtland, Ohio 44094-5172. Periodicals postage paid at Mentor, Ohio and additional offices.

Postmaster: Please send address changes to Forests & Gardens Magazine

Holden Forests & Gardens 9500 Sperry Road Kirtland, Ohio 44094-5172

For advertising information, call 216.377.3638

EDUCATION Partnerships create education opportunities for residents 22


Haans Petruschke’s love of Holden Arboretum started when he was a child and lasted a lifetime 24


Discover the best times to plant a host of trees 26

BIRD BIO Meet the song sparrow 28

On the Cover: Holiday lighting shines in the Madagascar biome at Cleveland Botanical Garden.

Stebbins Gulch side falls by Haans Petruschke, 2008.
CLASSES & EXPERIENCES . . . . . . . . . . . . . . . . . . . . . 30

Happy Holidays from Holden Forests & Gardens!

We are delighted to provide interim leadership of the organization while a national search is conducted for a new President & CEO.

With the arrival of winter comes crisp invigorating air that reminds us how important it is to head outside and remain connected to nature during the cold winter months. There are no better places to find unexpected seasonal beauty than at the Holden Arboretum and the Cleveland Botanical Garden. This winter season, plan to snowshoe on fresh powder at the Arboretum or go for a walk in the quiet outdoor gardens and woodlands in the heart of University Circle.

This year, we are excited to present the Cleveland Botanical Garden’s winter show, Twinkle in the 216, as we celebrate the historic character of Cleveland’s neighborhoods as they sparkle, shine, and add warmth and joy to the holiday season. Popular traditions return, including dozens of trees decorated by Affiliate Garden Clubs from Northeast Ohio and gingerbread houses assembled by bakers throughout the community. Once again, there will be plenty of photo opportunities for your annual holiday card, and don’t miss out on our Holiday Saturdays with a kids dance party, Krampusnacht for adults and Breakfast with Santa. The winter show runs through Saturday, Dec. 31st.

While we always invite you to visit our campuses, we also bring our gardens to the communities. Through a new partnership with the City of Cleveland’s Estabrook Recreation Center, Tom Masaveg on our education team taught children how to plant, water, weed and more in their own onsite garden at the recreation center. Indoor light carts were purchased so the kids can continue their gardening through the winter months. The program has been well-received by parents and caregivers — so much so, that Tom and his team were invited back for the fall and spring.

Over the past year and a half, a massive regional endeavor officially launched to breed pest-resistant trees for reforestation. Leaders at Holden Forests & Gardens, the U.S. Forest Service and the nonprofit American Forests founded the Great Lakes Basin (GLB)

Forest Health Collaborative to lead the way. The Collaborative facilitates sharing resources, workloads, research updates and more between the many organizations across the region working on these forest health efforts. Partners are already hard at work studying every aspect of these trees, their pests and how natural resistance can be bred into trees on a large scale.

Holden Forests & Gardens’ science, conservation and education work is made possible through generous support from members and donors like you. If you are able, please consider an additional year-end contribution to help us connect even more people with the wonder, beauty and value of trees and plants for healthier communities. We are grateful for your support.

Happy Holidays,

WINTER 2022–23 3
“Twinkle in the 216 will celebrate the historic character of Cleveland’s neighborhoods as they sparkle and shine, adding warmth and joy to the holiday season.”

Top Spots

Members share places they love in the winter.

Joseph Aber Location: Upper Baldwin

“Trees have long provided us with protection, nourishment and shelter. It is our time to return the favor to ensure we preserve our mutual environment for generations to come.”

Karen Roth


Blueberry Pond

“So much interesting growth surrounding this pond. Benches provide spots for relaxing and taking in the views.”

“Always the place to sit and get my calm and perspective back.”

Debbie Haswell Location: Corning Lake

Alexandra Maver

Location: Corning Lake

“Corning Lake is such a peaceful place, any season. In this photo, we were snowshoeing and noticed the snow formation falling from the trees. Our friend picked one up and looked through it.”

Kathleen Petrarca

Location: Holden


“The drive down Sperry Road to the main entrance of Holden is always beautiful — driving past the towering evergreens.”

Tim Harrison

Location: Woodland Trail

“My dog Cody and I enjoy the beauty, solitude, and seclusion of the Woodland trail, Pierson Creek loop and Old Valley trail, especially in winter.”

The Botanical Garden celebrates Cleveland’s holiday magic.

Let the countdown to the holiday season begin! Twinkle in the 216 celebrates the historic character of Cleveland’s neighborhoods as they twinkle and shine to add warmth and joy to the cold winter months. The winter show is open now through Saturday, Dec. 31.

The indoor and outdoor gardens pay a festive holiday homage to the beautiful blocks that knit neighborhoods, people, and plants and trees together. Guests seeking a holiday escape a little farther from home can enter the Madagascar and Costa Rica Glasshouses, transformed in the spirit of the season with special horticultural displays, lights and postcard vignettes referencing iconic towns within the spiny desert and cloud forest.

“Holidays are about coming together — as family, as friends, as community. This year’s winter show at the Cleveland Botanical Garden celebrates Cleveland neighborhoods by featuring vignettes of iconic local architecture, as well as holiday favorites such as handmade gingerbread houses, lighted outdoor trails, festive horticultural displays and decorated trees,” says Ryan Sandy, exhibitions manager.

Visitors will be surrounded by beautiful holiday plants and trees from evergreen conifers to poinsettias in shades of white, pink and red. Popular traditions return including dozens of trees decorated by more than 30 Affiliate Garden Clubs from Northeast Ohio and candy-coated gingerbread houses assembled by bakers from across the community. In the Ellipse, visitors will be greeted by postcard vignettes of iconic Cleveland landmarks and a stunning 20-foot-tall “living” tree built from live and dried plant material — a delightful background for holiday photos.

Be sure to get outside this year to experience festive displays from the terrace to the Hershey’s Children’s Garden complete with various activities for the whole family. Daily indoor and outdoor activities led by our educators and volunteers will include hot cocoa story time, marshmallow roasting, community crafts and more.

Tickets are on sale now and can be reserved in advance at holdenfg.org. Walk-up tickets will be available.

The Costa Rica Cloud Forest Biome features plants and trees with twinkle lights and spot lighting to create a festive scene.


Saturday, Dec. 3, 6 - 8:30 p.m.

Band: Erin Nicole Neal and the Chill Factors $5 for Members

$5 plus gate admission for Nonmembers Music, drinks and a special Krampus-inspired craft help celebrate this unique holiday tradition. The cost of the event is $5 in addition to admission. Advance ticket purchase is recommended.


Sunday, Dec. 11 & 18, 9:30 and 11 a.m.

Nonmember Adults $38, Nonmember Child $25 Member Adult $28, Member Child $22

Enjoy a limited seating breakfast inside the magically decorated Botanical Garden. Following breakfast, meet Santa for a picture and to share a wish list. Create a custom cookie plate for Santa.


Thursday, Dec. 22, 6 - 8:30 p.m. Gate admission only.

Enjoy all the holiday fun — together. Tear up the outdoor terrace as you dance along with our DJ. Light up the outdoor paths by making your own luminaires. Pile on the toppings at the hot cocoa bar.

Twinkle in the 216 hours are Tuesdays, Wednesdays and Saturdays 10 a.m. to 5 p.m.; Thursdays and Fridays 10:30 a.m. to 8 p.m.; and Sundays Noon - 5 p.m. The Botanical Garden will be closed on Mondays except for Dec. 19 and Dec. 26, when A Garden Holiday will be open 10 a.m. - 5 p.m. Special evening hours at the Botanical Garden will occur on select Saturdays – Nov. 20, 27 and Dec. 11 – when we will be open until 9 p.m. The Botanical Garden is closed on Nov. 25 (Thanksgiving), Dec. 25 (Christmas Day), and Jan. 1 (New Year’s Day). Additionally, the Botanical Garden will close at 3 p.m. on Dec. 24 and Dec. 31. Please check holdenfg.org for updated information.

Twinkle in the 216 admission is $20 per adult, $14 per child ages 3 to 12 (free for children 2 and under). Admission is free for Holden Forests & Gardens members. Tickets are available for purchase on-site at the visitor’s welcome desk or online at holdenfg.org. The Botanical Garden is located at 11030 E. Blvd. Indoor parking is available for a fee based on availability.

Additional Twinkle in the 216 events include:
Find unique botanical gifts at the Garden Store.
Visit holdenfg.org for store hours.

No Bad Weather


Forests & Gardens offers plenty of ways to get outside and enjoy winter.

It’s a gloomy winter day — again. What’s the best way to cure cabin fever and boost your mood during a cold, dark winter? Get outdoors and move. Winter may be the most underrated season for outdoor activities in Northeast Ohio — it takes a little more preparation, but there are lots of ways to enjoy this season when temps are low.

One of our favorite sayings around here in the winter is from Norway, “Det finnes ikke darlig klaer,” which translates to “There is no bad weather, only bad clothes.” When you’re planning an outdoor adventure in the cold, remember to layer up and accessorize. Dress for warmth with sturdy boots and socks, a cozy hat, mittens or gloves,

and your winter coat. It’s easy to work up a sweat when you’re hiking in the cold, though, so be prepared to shed a layer or two if needed. And no matter what the temps are, stay hydrated and bring a water bottle.

Get Moving…Simply

One of the simplest forms of exercise is hiking, a fancy way of saying “walking in nature.” No matter what time of year, walking is great exercise. It can also be a good way to meditate and focus your mind. We tend to spend a lot of time indoors in the winter, so even a short walk on an overcast day can be a mood-booster and a helpful way to soak up a little vitamin D.

Blaze your own trail with snowshoes. You can bring your own or rent them at the Arboretum Visitor Center while supplies last! CAMPUS VISITATION 10 FORESTS & GARDENS

Step it Up with Snowshoes

If you’re interested in “stepping up” your winter activity a little, snowshoeing may be for you. Whether you’ve never tried it before or are a seasoned snowshoer, the 240 core acres of the Holden Arboretum are a great place to get into it.

What exactly is a snowshoe? Great question. Used by cultures from snowy areas for thousands of years, it is a piece of equipment that can be strapped onto a shoe with a wide frame and webbing. The frame and webbing distribute a person’s weight over a wider area, making it possible to walk on top of the snow. Traditional snowshoes were made from wood and leather, but most modern snowshoes are now made from lightweight aluminum.

What is the best weather for snowshoeing? First and most importantly, snow on the ground. It is technically possible to snowshoe when the snow depth is around 4 inches, though the ideal depth is 6 inches or deeper. And the wetter, the better — thick, dense snow packs down easier and makes for a sturdier surface to walk over. You can always check out the Arboretum’s Plan Your Visit web page to find out the snowshoe conditions or call the main phone line to ask.

For beginners, snowshoeing is a simple activity with a low barrier to entry, and it’s a great workout. It may take some time to get used to walking with what feels like tennis rackets on your feet — keep your knees high and take marching steps. Snowshoe rentals are available on a first-come, first-served basis from the Corning Visitor Center on snowy days. And if you’re a seasoned snowshoer, you can bring your own equipment and hike around. You do not need to check in at the Visitor Center.

Once you’re on the snow, the Arboretum is your winter wonderland. Equipped with snowshoes, you can hike over any trails or large meadows throughout the property. A good beginner’s trail is the Blueberry Pond


Loop. It’s a moderate distance from the Visitor Center, and the pond can be a great place to spot winter animals or their tracks.

It is worth noting for safety you should make sure you’re looking out for and staying away from bodies of water and garden beds. Both of these spaces can be more difficult to notice when covered in snow, so keep an eye out for signs that identify ponds, lakes, and beds — and make sure you’re staying away from areas with significant low or high points.

An Activity for Anywhere

Whether you’re on foot or in snowshoes a fantastic winter activity for folks of all interests and abilities is birdwatching. While we love to recommend both the Holden Arboretum and Cleveland Botanical Garden as great spots for this activity (also known as “birding”) this is something you can do from a window in your nice, warm home, too. As much as we may miss the leaves on our trees over the winter, bare branches make for much easier conditions to spot winter birds.


Surprisingly, there are a lot of avian winter residents to add to your birding checklist. Well-known birds with bright colors like the northern cardinal, blue jay, American goldfinch, American robin, and downy or red-bellied woodpeckers are great species to spot more easily if you’re a beginning birder. Those with darker or more neutral plumage, including cedar waxwings, dark-eyed juncos, Carolina wren, and many species of sparrows, can be a good challenge. As you’re walking outdoors, try walking around different types of habitats and looking at different levels — treetops, meadows, or bushes for example. Different species prefer different types of habitats, so looking in varied areas can be a good way to add new birds to your list.

However you decide to keep active this winter — hiking, snowshoeing, birding, or something else — there are a lot of ways to enjoy the low temps. We hope to see you at the Holden Arboretum or Cleveland Botanical Garden so, together, we can make the best of this underrated season.

Beth Kelly is the Director of Guest Experience and has been with Holden Forests & Gardens since August of 2020. Her job is to ensure that everyone who visits the Arboretum feels welcome, safe and has a great experience. Her museum career, which began in admissions, has spanned managing and installing exhibitions, coordinating an executive office and planning events. She works closely with the talented guest experience team, and enjoys talking with members and guests. Beth is also a quilter, a novice birder, and she likes to spend time outdoors with her family.


Conserving Our Plants

Exploring best practices to protect and grow our gardens

This past fall I attended the 7th Global Botanic Gardens Congress in Melbourne, Australia. This is a semi-regular meeting of botanic gardens from around the world sponsored by Botanic Gardens Conservation International. More than 500 people attended. The theme of the Congress was “Botanic Gardens as Agents of Change,” and talks and tours centered around how gardens can make a difference in plant conservation, in curbing climate change and in engaging our communities.

There were many take-aways from the Congress — countless inspiring talks and people. I want to take this opportunity to highlight a theme of the Congress that is part of the botanical garden world but is underutilized and underdeveloped: conservation horticulture. Conservation horticulture is an emerging field that may or may not intertwine with typical horticultural work of plant production, garden design and grounds maintenance. What distinguishes conservation horticulture is that underlying all work is the intent to preserve and restore rare plants.

Banksia spinulosa, a species endemic to eastern Australia, thriving in RBGV-Melbourne, and blooming during what is their springtime! Clianthus puniceus, New Zealand Glory Pea, a New Zealand endemic nearly extinct in the wild but thriving at RBGV-Melbourne in two different color forms. The red sand garden at Royal Botanic Gardens Victoria – Cranbourne Gardens.

Botanical gardens maintain plant collections for many reasons — ornamental display, scientific research, education, etc. We often consider the plants on our grounds as highly valuable for conservation purposes. They are living representatives of species under the care of expert horticulturists, after all. But what does it really mean to have collections of conservation value? And are we doing it right?

Many talks at the Congress centered around this theme. I was impressed by how the conservation horticulture teams at many botanical gardens worked in tandem with garden conservation geneticists and botanists to build living collections that support ex-situ (outside the wild) conservation and in-situ (in the wild) restoration. Scientists are answering questions about how many plants are needed in collections to adequately represent wild populations. They are also asking questions about what kind of

genetic diversity current collections hold. How can we efficiently enhance that diversity with trips to the field for seeds and cuttings, and how can we effectively manage our collections so that we do not have redundant plants that take up valuable time and space?

From the horticultural side, there are questions about how to grow plants. Commercial nurseries are experts at propagating plants of commercial value. Ecologists and restoration practitioners are the experts at restoring wild populations but do not typically have horticultural training. Where does the expertise lie for growing those plants that no one has grown before? Or for which no one cares about besides those trying to save them from extinction? If we store seeds in a seed bank, what value is there if we do not know how to germinate the seed or grow the plants upon germination? That expertise and capacity is in the botanical garden space.

Araucaria laubenfelsii (left) and Araucaria muelleri (right), monkey puzzle relatives endemic to New Caledonia and growing in the collections at Royal Botanic Gardens Victoria – Melbourne Gardens.

Grass trees (Xanthorrhoea sp.) rescued from a mine site and planted in RBGV- Cranbourne, where Australian native plants are on full display.

Much inspiration is being drawn from the zoo model, where animal pedigrees are tracked to minimize inbreeding and inform collection development. Botanic Gardens Conservation International is currently repurposing software that zoos use to fit garden collections and hope to make it available in 2023. In a world where resources (space, money) are limited, pedigree tracking would allow gardens to more effectively manage plant collections without intense, expensive genetics work. In practice this is not dissimilar to how dog breeders might find a mate for their beloved golden retriever. Regardless of pedigree tracking, there is a consensus that no garden can conserve everything. Meta-collections — collections


Connor Ryan is the


a master’s


frequently be found at

a vast

Prior to

of single species across many gardens — are key to plant conservation at gardens. If Holden can steward a subset of plants of a rare oak species and 10 other gardens in the world can do the same, then we are on our way to conserving that species.

Conservation horticulture is a space I hope Holden can grow into more. It takes a conscious effort when in the field to sample in a meaningful way, rather than grab every seed you see, and it takes even more effort to grow and maintain those collections once the seeds get to the garden. The Congress was eye-opening in this regard, and I cannot wait to explore this more deeply.


Rhododendron Collections Manager at Holden Forests & Gardens, which means he has a hand in all things at HF&G. coming to Holden, he earned a bachelor’s degree in Plant Science from Auburn University and degree Plant Breeding, Genetics and Genomics from the University of Georgia. In the growing season, he can most Holden’s David Leach Research Station, where he leads an ornamental plant breeding program and stewards collection of named and unnamed rhododendron hybrids. Connor started at Holden in spring 2019.

Great Lakes, Great Trees

The new Great Lakes Basin Forest Health Collaborative is leading the charge to save ash, beech and hemlock trees. Their base is at the Holden Arboretum.

Wandering the Holden Arboretum, it’s all too easy to take in the trees, stroll the boardwalk and stop to smell the flowers without ever knowing the impact the Holden team is having outside Kirtland. Over in the Ellen Corning Long and T. Dixon Long Center for Plant and Environmental Science, researchers are caring for trees at every stage of life: preparing just-collected seeds to spend a winter in cold storage, watering young seedlings growing in pots in the greenhouse, pruning adult trees in the research orchard and studying trees as they succumb to disease at the end of their lives. Their hope is that these trees — the ones that survive — might hold the key to saving their species.

These American trees are ash, beech and hemlock. They’re native to the region, are important components of local forest ecosystems and are each under serious threat from their own suite of invasive pests. The emerald ash borer has ravaged populations of ash. American beech is falling ill from beech bark disease and beech leaf disease, while hemlock wooly adelgid (a small aphid-like insect) and elongate hemlock scale are killing eastern hemlock trees across the country.

Experts have been hunting for remedies for these pests from the time they were each first spotted — some over a century ago, some within the last decade. But even when something like a pesticide seems to stave off the attackers, the expensive and time-consuming treatments aren’t feasible solutions on any sort of large scale. At some expense, a homeowner can hire a tree care firm to treat the ash tree in their front yard. But that doesn’t help the trees in the forest.

But as these pests swept across the country people began to notice that, even in areas where nearly every tree had been killed, a few stragglers remained. These holdouts are sometimes

called lingering trees. And often, these healthy adult ash, beech and hemlock trees survived their local infestations because their particular genetic makeup gives them an innate resistance to the pests.

If any trees are naturally resistant, that means those trees can be bred for restoration, opening a new option of replanting and repopulating forests where the trees have been killed. But to pull this off would require a massive effort to find lingering trees, test them for resistance, breed them and, one day, plant them en masse.

Luckily, many foresters, conservation professionals, scientists and tree lovers have decided it’s worth the effort.

In January 2021, a massive regional endeavor officially launched to breed pest-resistant trees for reforestation. Leaders at Holden Forests & Gardens, the U.S. Forest Service and the nonprofit American Forests founded the Great Lakes Basin (GLB) Forest Health Collaborative to lead the way. The Collaborative facilitates collaboration — sharing resources, workloads, research updates and more — between the many organizations across the region working on these forest health efforts.

Partners are already hard at work studying every aspect of these trees, their pests and how natural resistance can be bred into trees on a large enough scale. Experts from other arboretums, the U.S. Forest Service, universities, research institutes, parks, forest preserves and more are joining forces. The hope is that breeding resistant trees for restoration will preserve these important species for the long haul. No individual group would be able to pull it off alone, but, as a whole, the Collaborative may just be able to save these trees.


American Beech (Fagus grandifolia)

Amainstay of eastern forests, our native beech is an American classic. Beech forests burst with bright oranges and yellows in fall, while wildlife go nuts for their beechnuts. Their smooth, gray bark is unmistakable beneath their glossy, dark, oval-shaped leaves donning zig-zagging branches.

Beech bark disease arrived in Nova Scotia in the 1890s from its native Europe. It’s caused by a bark-eating scale insect that brings fungal infections in its wake. The disease didn’t pop up in the U.S. until the 1930s, and it didn’t reach Ohio until the 1980s. In impacted areas the disease typically kills about half of beech trees within a decade, with around 90% expected to die eventually.

But that’s not all that threatens the trees. Beech leaf disease is the newest enemy on the scene, first documented in Ohio in 2012. It’s associated with an infestation by nematodes, a small, worm-like animal that lives in and feeds on buds and leaves. When the disease arrives, the spring leaves emerge as dark, discolored and leathery with a characteristic striped pattern called interveinal banding.

David Burke, Holden’s vice president for science and conservation, is a leading expert on threats like beech leaf disease. “This is an emerging disease,” Burke explains. “We’re still trying to figure out the biology of this disease and, of course, how to control it.”

“People often ask me, should I just cut all my beech trees down? And our answer is no — some of the trees could be resistant, and those trees are the basis for breeding selection programs,” says Burke. “Don’t take down any trees proactively, even if the ones around them are dying.”

The GLB Forest Health Collaborative has already begun collecting samples from potentially resistant beech trees, and brought them back to Holden for study. “We have about 80 beech trees in our research plantation,” says Burke. “They were selected for resistance to beech bark disease, and I’d say probably about 40% of them look really good even though the ones around them have beech leaf disease and are looking really ragged.”

These clones will undergo further testing to see if they’re resistant to beech bark and/or beech leaf disease. If they are, they’ll be used to breed trees that could one day be used for replanting efforts.

Got nematodes?

Prune your beech trees! Winter is the best time to prune trees, and if you have a beech, especially one with symptoms of beech leaf disease, pruning can help.

Nematodes love wet leaves and branches — they use the water film to move around. Pruning trees will increase light and air circulation, which can dry things out, slowing the spread of the nematodes and the progression of the disease.


Eastern Hemlock (Tsuga canadensis)

Across Appalachia and into the Great Lakes basin, Eastern hemlocks thrive in forests along streams, providing year-round shade and shelter to black bears, porcupines, deer and diverse communities of small mammals and birds. In places like the Great Smoky Mountains, these “redwoods of the East” can grow more than 150 feet tall and live over 500 years.

The trees have been fighting elongate hemlock scale for over a century, ever since the Japanese insect was first found in New York in 1908. The tiny brown insects lie super flat, barely resembling the animals that they are, and feed by sucking the nutrients out of hemlock needles.

Meanwhile, another insect, the hemlock woolly adelgid, is also attacking the trees. First found in the eastern U.S. in Virginia in 1951, these white, fuzzy, aphid-like critters attach themselves to the base of the needles and — like the scale — suck the nutrients out. These two pests are particularly fearsome when they occur together, giving the trees a one-two punch that can render them dead in less than a decade.

Experts estimate that at least half of the hemlock population is infested. In the worst-hit areas, over 80% of the trees have died. One of the first efforts of members of the GLB Forest Health Collaborative has been to facilitate work on figuring out how to best propagate the trees in captivity. Key research partners from the U.S. Forest Service Northern Research Station and the New Jersey Forest Service have been studying how to encourage trees to flower and seed faster.

In the fall of 2021, people across the country started collecting hemlock seeds for research, sharing them with Holden and the National Seed Lab. That winter, Forest Health Coordinator Rachel Kappler and others at Holden prepped the seeds and put them into cold storage for stratification — a process that preserves them while preparing them to germinate as soon as they’re thawed and conditions are right.

And this April, almost 900 hemlock seedlings arrived at Holden from New Jersey. These trees come from a population where hemlock woolly adelgid has been causing problems for 40 years — but these trees seem to be doing fine. They’re up next for testing to see if they’re truly resistant to the pest.


Hemlock tree ID: Hemlocks loosely resemble spruce or fir trees, with short needles spaced along their branch es. But hemlock needles are flat (if they’re easily rolled in your fingers, you may have a spruce) and have a little stem that connects each one to the branch (if the needles attach directly to stems, you may have a fir).

Hemlock needles are also more rounded than straight and often have two white racing stripes on the under side. Remember: “Hems have stems!”

Anna Funk is the Science Communication Specialist for Holden Forests & Gardens. She earned her Ph.D. studying prairie restoration before leaving the research world to help tell scientists’ stories. Today, she wears many hats, freelancing as a writer, editor, journalist and more — anything that lets her share her appreciation of science and its impact with others.


Ash trees have three key features that they all share: Opposite stems and leaves. This means that where a leaf attaches to a branch, there’s another leaf directly opposite of it. Compound leaves with 5-9 leaflets. Like hickories, walnuts, locusts and other common trees, ash have leaves made up of smaller leaflets.

Gray bark that makes a diamond pattern (especially in mature trees).

Ash (Fraxinus spp.)

The emerald ash borer was first spotted in the U.S. in 2002 outside Detroit’s shipping yards. It made it to Ohio by February 2003. And, since then, the Asia native has spread to 36 states and the District of Columbia, as well as five Canadian provinces. Underneath a tree’s bark is a layer of tissue that it uses to transport food and nutrients. This is the emerald ash borer’s favorite food. The small, shiny green beetles burrow inside, tunneling around the cambium until they’ve killed the tree. The National Park Service estimates there are around seven billion ash trees in the country. So far, hundreds of millions have been killed by the borer. In places where it has spread, it’s killed almost 100% of the trees — almost. The few that remain will be critical to find, study and, if they’re truly resistant, breed for restoration.

Behind the Long Science Center at Holden, there’s an orchard. Each tree is a special ash — a clone made by grafting a branch from a potentially resistant tree in the wild onto a separate sapling (or rootstock) that will serve as the tree’s new base. The trees were planted in 2015 — before the Collaborative was even an idea — but they have started producing seed of their own this year, just in time to accelerate the Collaborative’s efforts. The GLB Forest Health Collaborative’s partners are working on installing new ash clone orchards in other locations across the region. In September, the Collaborative sent word to local newspapers across the Great Lakes region that they were on the hunt for lingering ash trees and starting to collect their seeds. Within a few weeks, a half dozen private citizens from Ohio, Illinois and Michigan had heeded the call and agreed to send seeds to Holden for research.

The GLB Forest Health Collaborative is making steady progress for each of their trees. Many Collaborative partners across the country are chipping away at the unanswered questions about these trees and their pests, while others are already at work breeding resistant trees. But there’s so much left to be done. Here’s how to lend a hand:

1. Report lingering trees with the app TreeSnap. Think you’ve spotted a lingering ash, beech or hemlock? Let researchers know by uploading your observations with the easy-to-use app, TreeSnap. Find it in the app store. Learn more at: treesnap.org/

2. Volunteer at the Holden Arboretum. There’s work to be done, and you can help! Researchers can use assistance repotting trees in the greenhouse, maintaining orchards behind the science center, collecting data and more. Learn more at: holdenfg.org/make-an-impact/volunteer-opportunities/

3. Join the GLB Forest Health Collaborative. If you’re in the tree conservation sector in the eastern or central U.S., join the Collaborative! They’re always adding new partners who can help with monitoring trees, monitoring the spread of insects and disease, locating potentially resistant individuals, collecting and storing seeds and scions, germinating or grafting trees and/or planting trees for research. Contact Forest Health Coordinator Rachel Kappler at rkappler@holdenfg.org for more info.

1 2 3

Creating Adventures

Meet Beth Kelly, Holden Forests & Gardens’ director of guest experience.

You and the Guest Experiences Team welcome hundreds of thousands of people to the arboretum each year. What makes the arboretum experience different? Why is it a special place?

There really is something for everyone out here at the Arboretum, and our guest experience team definitely helps make the experience unique and special for guests and members alike! For seasoned hikers and garden enthusiasts we have miles of trails and cultivated gardens. The Emergent Tower and Canopy Walk are great for adventurers, and seasonal Tram Tours are perfect for folks with more limited mobility. For young kids (like my 5 and 1-year-old) Buckeye Bud’s Adventure Woods is a fun, natural play space. And what makes us even more unique is that all these great adventures are set against the backdrop of Holden Forests & Gardens’ living collection of plants and trees.

What are some of your favorite plants and trees and why?

I love nature but do not have a very green thumb, so some of my favorite plants are perennials that grow without needing much help from me. Purple coneflower and black-eyed Susans are bright and cheery, but I also love ferns of all kinds. Conifers, too — our winters in this area can be so bleak and gray that those splashes of evergreen are so welcome come January and February.

What are some of your favorite books and/or films about nature?

One of my areas of focus in college (I went to art school) was natural dyes. The book, Color: A Natural History of the Palette by Victoria Finlay is still a favorite from those days. The author explores the history of traditional natural dyes, so many of which are botanically-derived — indigo, madder root and marigolds to name a few. Michael Pollan’s The Botany of Desire is an oldie but a goodie, too — a fascinating look at how humans and plants affect each other’s fates and futures.

What is one of your first memories experiencing wonder with a plant or a tree?

That’s a pretty far-back memory from when my mom helped me make a book of seeds as a Kindergarten assignment. We cut open fruits and vegetables to pick out their seeds, dry them, and label and glue them into a little book. I remember being amazed at the difference in size and shape of seeds like tomatoes and lemons, and especially how different they were from the fluffy dandelion and helicopter maple seeds I played with in my backyard.

Save the Date January 28-March 12

Outreach for a Healthy Green Community

City of Cleveland’s Recreation Centers offer educational opportunities for residents.

Our Education Team delivers classes and learning opportunities on site at the Botanical Garden and the Arboretum. There is also a robust program for schools at all levels. What many may not be aware of is the important outreach programming done in the larger Northeast Ohio community. Holden’s vision is that “all communities transformed into vibrant places where trees, plants, and people thrive.” A wonderful example of how we are putting this vision into action is the exciting project begun in the summer of 2022 with the City of Cleveland.

Holden Forests & Gardens submitted a proposal to provide programming to Cleveland’s Neighborhood Resource & Recreation Center Programs and Activities Department. Did you know that the City of Cleveland has 21 recreation centers in neighborhoods all over the city? These centers provide free programming for all ages. After the pandemic the city requested proposals from partners to provide programming that had a special emphasis on helping residents develop

resilience and focus on mental health. This is a significant opportunity to work with our neighbors, develop partnerships and introduce participants to the benefits of trees and green spaces in their own neighborhoods.

The first partnership in the summer of 2022 was with Estabrook Recreation Center. Estabrook is located at 4125 Fulton Avenue near the Cleveland Metroparks Zoo. Partnerships work best, last longer and have better outcomes if they are based on the needs of the client — not on the preconceived notions of the institution wanting to serve. This requires conversation, planning and flexibility.

Tom Masaveg, the public programs coordinator in the Education Department, took the lead. Masaveg met with the director of the Center to see what their needs and desires were. It was determined that programming for school age youth was their greatest need and, after several site visits, everyone involved felt that the front garden at the Center would be a great project to work on with the kids.


“Once the season officially started, we started by pulling all the weeds, identifying them, tasting the edible ones and even dressing up in the wearable ones,” says Masaveg.

“With the weeds out of the way, we moved on to soil,” Masaveg adds. “We made mudpies and collected some of the living critters in the soil to observe them and discuss their roles before releasing them again. Next, we mulched and graveled to create a safe distinct pathway, suppress weeds and prepare for planting. We moved some Hosta’s out of the path and into the beds. We learned the parts of a seed and planted several sunflower seeds. We made worm puppets and seed parachutes as crafts.”

Then the group was ready to start planting. They spent multiple sessions getting plants in the ground and watering. The kids wanted to attract butterflies, so they planted herbs to welcome them to the garden. Masaveg and the youth also planted Stevia because the leaves taste sweet, purple basil for parents to cook with, lemon thyme for the lemony smell and bronze fennel to attract black swallowtails. The kids were thrilled to find four caterpillars after the planting.

“The latest activity was to create some seating in our garden, which the kids decorated with decals. Much more to come,” says Masaveg.

Over the past few summer months there has been more gardening, more weeding, more planting, a dead tree removal, preparation for a new tree and lots more engagement. Indoor light carts have been purchased to help continue programming during inclement weather. These programs are voluntary and held twice a week in the afternoon after school — and kids return again and again. Parents even stop by and ask questions. The greatest indicator of success is the center’s request for HF&G to continue programming this fall, which is currently underway, and into the spring of 2023.

The original proposal to the City provided enough funds for five seasonal programs. The City initially funded two. They have since come back and asked HF&G to provide all five and added a sixth based on our success at Estabrook.

Building partnerships takes continued work and repetition. The desired outcome is to help the kids to make an impact in developing a healthy green community in their neighborhoods. So far that is exactly what they are doing and what HF&G will continue to help them do.


Tom Masaveg grew up in inner-city Cleveland and now serves the city and region as a Public Programs Coordinator. His approach to education and curated experiences began when with an immersive residency in Ohio forests that spanned over a decade. His work in Montessori education and community art eventually aligned with a career at Holden Forests & Gardens offering outreach opportunities for youth and families. Tom’s intention to strengthen connections between people and their living environment is driven by the belief that we can all benefit from the natural world around us.

WINTER 2022–23 23

Curious Mind Leaves a Lasting Legacy

Haans Petruschke’s love of Holden Arboretum started when he was a child and lasted a lifetime.

Haans Petruschke had a curious mind that helped propel him as an engineer in his professional life and in his 50 years of service as a volunteer at the Holden Arboretum. Driven by his sharp intellect, Haans helped Holden Arboretum with everything from VIP tours of Little Mountain to longitudinal surveys on bird breeding. The lifetime commitment to conservation and learning was cemented with Haans donating his entire estate to Holden Forests & Gardens upon his untimely death earlier in 2022.

Upon their arrival to Kirtland, the Petruschke family began hikes when Haans was a young boy, and the family has carried on the legacy of being inspired by the outdoors. Haans’s niece, DeAnn Sandel, recalls a bit about the family’s traditions at Holden Arboretum.

“I can remember starting our hike in my grandparents’ back yard that was a part of Chapin Forest,” says Sandel. “We would identify plants and trees and focus on what was native or invasive. It was so immersive that we could be out there for hours and only go a couple of miles. Even now, my sister and I laugh that it wasn’t the Girl Scouts that taught us this stuff — it was Haans and our family.”

Haans started to volunteer with Holden Arboretum as a 12-year-old following in his mother’s footsteps in giving back to the organization. While he started with tagging along on hikes with a first aid kit, Haans most recently worked in collaboration


Ways to Give

Stock Gifts

Have your stocks appreciated in value since your purchase? Consider using that asset for your charitable giving to HF&G. Not only will you get an income tax deduction for the full market value of donated securities (if owned for more than one year) but you can avoid the capital gains tax on the appreciated value.

Qualified Charitable Distributions (QCD)

Support HF&G with a Qualified Charitable Distribution from your IRA. If you are over 70 ½, you can satisfy your required minimum distribution while transforming our region into a vibrant place where plants and trees thrive. QCD distributions directed to charity are not considered taxable income.

Donor-Advised Fund (DAF)

This philanthropic giving vehicle provides an immediate tax benefit to you and allows you to grant funds to charities of your choice. Request a grant distribution to HF&G through your DAF sponsor today!

Looking for other ways to give?

Contact Chris Keeney at 216-707-2834 or ckeeney@holdenfg.org to find the best way for you to give.

with HF&G’s Mike Watson, conservation biologist, on a bird breeding survey and a project focused on the dark-eyed junco. Both projects center around tracking the migration patterns of birds in our natural areas. Watson thought Haans was uniquely qualified for these projects.

“Haans had a combination of skills that made him very valuable to this research,” says Watson. “His orienteering skills made him comfortable in our natural areas. As an engineer and with his background with statistics, he had a unique way of approaching things.”

The years spent on the Holden trails helped Haans to notice broader ecological trends and monitor the trail conditions across the natural areas. In Watson’s time working with Haans, one trait stands out.

“The thing that always struck me was how curious he was,” Watson recalls. “He could be on the lookout for birds, and he is going to also try to identify and understand every other thing he saw along the way. He was broadly curious with a lot of diverse interests. It wasn’t limited to wildlife or birds.”

The wide range of interests centered around a thirst for knowledge was likely developed at his Kirtland home. Sandel recalls that all generations were encouraged to try many activities and explore interests until they found their niche. While others found their passion with dance, art or music, Haans was always drawn to both art and science.

“Our grandparents [Haans’s parents] instilled in all of us to not be lazy about the way you think,” Remembers Sandel. “We were taught to use our imagination and figure it out.”

That passion for figuring it out kept Haans connected to the Holden Arboretum for decades. He was driven to use his volunteering to help identify the everchanging patterns of our environment. Unfortunately, Haans passed away in May 2022. His ties to Holden Forests & Gardens are everlasting, as he made an estate gift to help cement his legacy as an ardent supporter of the organization.

“Haans once told me that he had difficulty verbally expressing love,” Sandel recalls. “I went back to him and told him that he didn’t need to express it verbally. Your actions have always said it. I don’t think he would have poured so much into Holden unless he truly loved it.”

Haans’s ultimate expression of love will help lead Watson and others at HF&G to see his projects to fruition. We all know that the curious mind of Haans will want the answers.


Chris Keeney joined Holden Forests & Gardens in February as the Major Gifts Officer and is based at the Cleveland Botanical Garden. Prior to HF&G, Chris was the Director of Development at EDWINS Leadership & Restaurant Institute, and he has also worked at the United Way of Greater Cleveland and the Cleveland Metropolitan School District. Chris looks forward to building the culture of philanthropy at HF&G and meeting donors and members.

“I don’t think he would have poured so much into Holden unless he truly loved it.”
—DeAnn Sandel

When to Plant a Tree

Certain types of trees are generally recommended to be planted in spring and not in fall, especially after early October. If a tree was dug in late summer, or planted from a container that is not root bound, then fall planting is often not much of a risk. Balled and burlapped (B&B) trees typically recommended for early spring planting here include Magnolia , tulip-tree (Liriodendron) sweet gum (Liquidambar ), most oaks (Quercus), tupelo (Nyssa), bald-cypress (Taxodium), Ginkgo, giant arborvitae (Thuja plicata), and Chinese hemlock (Tsuga chinensis). Bill Hendricks, president of Klyn Nurseries in Perry, Ohio discussed this with me recently. Bill says you can plant B&B oaks in fall, but they must be dug from the nursery in late August or early September.

Spring planting should be accomplished in late March through April before new shoots have emerged from bud. When shoots are actively growing, less resources are available for root growth. If a significant percentage of roots are lost in transplanting in May or early June, actively growing new shoots wilt and the tree may die. When the shoots are not actively elongating is the best time to plant since more resources are devoted to root growth, which for many trees starts to pick up again in July. August through early October is a prime time for root growth if soil is not too dry, so this is a fine time to plant many trees including conifers such as spruce (Picea) and pine (Pinus) given that you keep up with watering until adequate rains fall.

Evergreens in general are best planted in late summer. David G. Leach would plant his Rhododendron in August and September giving them time to establish before winter, not to mention the next summer. When soil temperatures drop in fall, root growth slows and then ceases by the end of December most years in Northeast Ohio. Trees such as white spruce (Picea glauca) can be successfully planted in late December. My father used to have a balled and burlapped white spruce indoors only for two days or so before my brothers and I helped him plant them the day after Christmas (they all lived). Straw was spread over the pre-dug planting site to keep the soil from freezing.

Trees that are generally challenging to dig after early September include Katsura tree (Cercidiphyllum), redbud (Cercis), yellowwood (Cladrastis), dogwood (Cornus), beech (Fagus), golden larch (Pseudolarix), Japanese pagoda tree (Styphnolobium a.k.a. Sophora), and Zelkova which require soil temperatures of about 56 degrees F. or higher to grow new roots.

Nyssa sylvatica ‘Autumn Cascade’ in the Main Display Garden at the Holden Arboretum. Quercus montana in the Holden Arboretum’s Myrtle S. Holden Wildflower Garden. Quercus bicolor fastigiate in the Helen S. Layer Rhododendron Garden at the Holden Arboretum.


The roots of Magnolia, Liriodendron, and Ginkgo are relatively coarse and do not regenerate quickly enough when planted in fall to establish or ward off root rot that can occur on cut roots during our wet winters. Trees that are marginally hardy here such as bald-cypress, sweetgum, giant arborvitae or Chinese hemlock can suffer significant dieback or may even die if stressed going into winter by transplanting. Tupelo like many oaks is tap rooted and is not recommended for fall digging. However, we have had success at Holden Arboretum planting tupelo and other hardy trees mentioned above from containers in October and November given that they are not overly root-bound.

For containerized trees it is important to cut circling roots near the top of the pot back to where they are pointed out away from the trunk, so they do not grow around the expanding trunk and choke it in the future. Stem girdling roots cause significant mortality in landscape trees. The necessity of cutting these roots makes timing of planting more relevant so new roots can establish themselves readily. Therefore, late summer to early fall is generally the best time to plant trees in Northeast Ohio. Even if the tree loses leaves in hot dry weather, most of the food has been made in spring, so losing leaves in late summer does not hurt the tree much. Early spring planting is also desirable since the tree will regulate new shoot growth according to how many roots it has lost and while top growth may be slow at first, resources are being allocated for new roots to get established so the tree can thrive.

Trees with a reputation of low transplant success such as American hornbeam (Carpinus caroliniana), sourwood (Oxydendrum arboreum), Carolina hemlock (Tsuga caroliniana) and Franklinia are best moved in late summer or early spring. At Holden, trees are generally not fertilized once they are planted as fertilizers can inhibit mycorrhizal fungi, which transfer nutrients to trees at no cost.

Bare-root trees are not commercially available, but you may want to DIY. I had success on a rainy April day bare-rooting an umbrella magnolia (Magnolia tripetala) from Ellen McFarland, putting it in the back of Corliss Knapp Engle’s Saab with the roots hanging out the back on the way to her Brookline, Massachusetts garden. In late October we successfully bare-rooted a sixteen-foot tall ‘Arnold Promise’ witchhazel (Hamamelis x intermedia) in the Engle garden that some experts said would be a failure.

Healthy trees are resilient. Plant appropriate trees at the right time with important people in your life. You will never regret it.

Ethan Johnson is the Plant Records Curator. He learned to keep records while working for the Arnold Arboretum (1985-89) and Holden Arboretum (1981-82, 1989-present) while volunteering for the International Dendrological Research Institute, Ohio Nursery and Landscape Association Plant Selection Committee and the American Conifer Society. He was the point person when the American Association of Museums accredited Holden Arboretum as the sixth public garden in the U.S. as a museum, has labeled and inventoried Holden Arboretum’s plant collection and has been keeping plant records at Cleveland Botanical Garden since 2015. Liriodendron tulipifera in the Woodland Garden at Cleveland Botanical Garden. Ginkgo biloba at the Kohl Gate at Cleveland Botanical Garden.

Song Sparrow

Melospiza melodia

Song sparrows are one of the most common sparrows found throughout North America. They are observed in various open habitats, including shrubby fields, streamsides, brushy edges, hedgerows, and lush shrubby gardens. Males are often seen around eye level, perched on exposed branches singing at the top of their lungs.

Song sparrows feed on the ground, eating seeds, invertebrates, and some fruit. They rarely forage in flocks and prefer to find food alone. They feed heavily on various grass seeds during the fall and winter. In the spring and summer, they eat insects and other invertebrates, including ants, beetles, caterpillars, grasshoppers, spiders and wasps. Song sparrows visit platform feeders with the seeds such as white millet, sunflower, cracked corn, peanut hearts and nyjer.

Song sparrows are primarily monogamous. During the mating season, courting birds fly

together, fluttering their wings, cocking their tails up and dangling their legs to establish pairs. Once pairs are selected, both males and females search for the nest site together.

Nests are usually near swampy water in grasses and shrubs. Early in the season, nests are generally on the ground, while later nests can be as high as 15 feet in a shrub or tree. Females build the nest in four to 10 mornings with loose grasses, bark, rootlets and animal hairs. Nests are four to eight inches in diameter and two to four inches deep.

Females often lay two or more clutches of three to five pale blue or greenish-blue, purple-brown speckled eggs per breeding season. They incubate the eggs for 12 to 14 days. Both parents tend to the young. Males may feed young while females are building another nest nearby. Young leave the nest 10 days after hatching, can fly at seventeen days, and are independent in 18 to 20 days.


SIZE: 5–7 inches

WINGSPAN: 7–9 inches

DESCRIPTION: Brown and black streaks; white chest with brown streaks and central breast spot; warm red-brown and slaty gray head.

RANGE: Throughout most of North America; breeds in Canada and northern states; year-round resident of Ohio.

VOICE CALL: Sharp chip note

SONG: Loud, sharp song that finishes with a buzz or a trill

Song sparrows are widespread across most of North America. According to the North American Breeding Bird Survey, populations have declined by about 27% between 1966 and 2019. Wetland degradation and destruction are the biggest threat to song sparrows. According to the United Nations topic on climate change, wetlands are disappearing three times faster than forests. Wetland destruction would harm not only song sparrows but also 40% of the world’s species. Protecting wetlands is vital to safeguarding the health of our planet.

BEST LOCATION TO VIEW: Arboretum: Corning Lake Garden: Shade Garden or Woodland Garden Rebecca Thompson is the Education Manager at Holden Forests & Gardens and has dedicated her career (1999 – present) to school-aged children and life-long learners. Her enthusiasm for the natural world has kindled a sense of exploration, discovery and a deeper appreciation for the environment. Her passion for bird watching drove her to become a self-taught local bird expert. She has served as President on local boards, including Blackbrook Audubon Society and Cleveland Regional Council of Science Teachers.
This holiday our gardens are aglow with some of our favorite neighborhoods. NOV 19 - DEC 31 | HOLDENFG.ORG

Classes & Experiences


Virtual Botanical Painting & Drawing with Susan Gray Be

Tuesdays, Jan. 10 - Feb. 14, 2 - 4:30 p.m.

Virtual Adult

$60 members, $100 nonmembers

Winter Blues: Dyeing with Indigo January 14, 10 a.m. - Noon

Cleveland Botanical Garden Adults, children 12 and over with adult $25 members, $40 nonmembers

Magnificence on the Mountain Hike Jan. 14, 11:30 a.m. - 3 p.m.

Holden Arboretum


$10 members, $20 nonmembers

Winter Tree ID Hike

Jan. 18, Noon - 1:30 p.m.

Holden Arboretum


$20 members, $35 nonmembers

Basics of Basketry

Jan. 29, 10 a.m. - 1 p.m.

Holden Arboretum Adult

$45 members, $60 nonmembers


Behind-the-Scenes Orchid

Photography with Debbie DiCarlo

Feb. 5, 8:30 a.m. - 2:30 p.m.

Cleveland Botanical Garden Adult

$80 members, $120 nonmembers

Star-crossed Lovers: Wine & Chocolate Night Feb. 11, 7:30 - 9 p.m.

Holden Arboretum Adult

$45 members, $60 nonmembers

Ask an Orchid Doctor Feb. 11 and 25, 10:30 - 11:30 a.m.

Virtual Adult Free

Stebbins Gulch: A Hike Through Geological History

Feb. 18, 11:30 a.m. - 3:30 p.m.

Holden Arboretum Adult

$10 members, $20 nonmembers


Little Explorers: Maple Magic

March 11 and 10 - 11:30 a.m. or 1 - 2:30 p.m.

Holden Arboretum | Working Woods

Children 3-5 years old with adult

$25 members, $40 nonmembers, $10/additional child (ticket price includes adult and one child attendee)

History of Japanese Gardening

March 16, 7 - 9 p.m.

Virtual Adult

$10 members, $25 nonmembers

Magnificence on the Mountain Hike March 18, 11:30 a.m. – 3 p.m.

Holden Arboretum Adult $10 members, $20 nonmembers


9500 Sperry Road

Kirtland, Ohio 44094


Forests & Gardens is the member magazine for Holden Forests & Gardens, which includes the Holden Arboretum in Kirtland and the Cleveland Botanical Garden in Cleveland.

MISSION: Holden Forests & Gardens connects peo ple with the wonder, beauty, and value of trees and plants, to inspire action for healthy communities

VISION: All communities transformed into vibrant places where trees, plants, and people thrive

©Holden Forests & Gardens

“Holden Forests & Gardens” and the related logo is a trademark owned by The Holden Arboretum.


HOLDENFG.ORG 440.946.4400




For updates, visit holdenfg.org


HOLDENFG.ORG 216.721.1600





* check holdenfg.org for holiday show hours

For updates, visit holdenfg.org

@clegarden @holden_arb Newsletter @cbgarden @holdenarboretum holdenfg.org @cbgarden @holdenarb
Issuu converts static files into: digital portfolios, online yearbooks, online catalogs, digital photo albums and more. Sign up and create your flipbook.