2014 August gifted gardener

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HORTICULTURE

Gifted Gardener

A U G U S T

INSIDE THIS ISSUE:

WINTER DAMAGE ON ORNAMENTALS

Protect 2 Pollinators from Pesticides Farmers Market

3

Turf Ren- 4 ovation Should Take Place Summer Recipes

6

Asian Tiger Mosquito

8

Rebloom- 9 ing Perennials Whitetail 10 Deer

Activities & Ideas

11

Winter damage has been a constant theme with my diagnostic work and home visits this summer. Several plants took it strongly on the chin this past winter. There were many plants that hadn't been tested with temperatures like we experienced this past winter. It really wasn't an extreme low but the length of the cold spell that resulted in many damaged plants. One that has continued to recur is the ornamental cherry. Many varieties exist and all seem to be affected this season. The first is a result from freeze damage and shows up in the form of perennial cankers. Cankers are most visible by the evidence of gummosis. Gummosis is the sticky ooze that comes out of the trunk and limbs of affected plants. Most folks recognize a problem when they see dieback of limbs. Vertical trunk splitting 1

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has also been a problem this season as well on these same plants. While splitting normally does not hurt a healthy growing tree it does apply its own level of stress to the plant. Unfortunately there are no control measures for these issues except keeping it watered when dry and fertilizing in the fall to promote growth. Boxwoods are another plant that didn't fair well coming out of this winter. I have looked at several plants that have limbs turning straw brown and dying back. There are more than a few things that can cause this type of symptom in boxwood but one culprit has been identified most often; Volutella leaf and stem blight. Boxwood is more susceptible to infection when subjected to stress from improper watering, winter injury or wounds.  Prune out and burn dead branches.  Remove dead leaves from crotches.  Minimize wounding especially during the winter months.  Maintain good air circulation and drainage.  Avoid high humidity (>85%) for long periods. (Continued on page 11)


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