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How-To

Treat Winter Injury to Your Trees

Fine Gardening - Issue 194
Photo: millettephotomedia.com

Winter injury is among the most common tree problems experienced in colder areas of the country.

1. What it looks like

Winter injury actually includes several different plant problems that may occur over the course of winter. Browning of leaves, delayed leafing out, and even sometimes the sudden death of a tree can all be telltale signs.

2. How to diagnose it

Freezing injury occurs when trees experience temperatures below their current level of hardiness. Cold-hardiness increases as trees acclimate during fall and then decreases as they de-acclimate in spring. If a tree is exhibiting symptoms during these two “shoulders” of plant hardiness, it could be experiencing freezing injury.

3. What causes it

Photo: Missouri Botanical Garden PlantFinder

In the Rocky Mountains and Plains states, rapid temperature drops often occur in fall as trees are acclimating; this results in early freeze damage. In the Midwest and East, late frost damage is more common…

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