What's the difference between sunscald and frost cracks? Davey arborist Michael Sundberg shares tips on how to protect your trees from sunscald and frost cracks.What is Sunscald?
When sunlight shines on tree bark during a warm winter day. But when the temperature drastically drops at night, those cells are injured. The result is a discolored, sometimes sunken area of bark.
What Causes Frost Cracks?
Fluctuating winter temps can also cause frost cracks. A repeated switch from warm to freezing temperatures causes the inner layers of bark to expand then shrink over and over. Eventually, that tension causes a crack.
How to protect trees from sunscald and frost cracks?
Arborist Sundberg suggests wrapping your younger trees during the winter months, November-April. It acts like an insulator and helps protect the bark during the drastic temperature changes.
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