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I have a flowering crabapple in my yard whose bark has several large areas where it cracks and curls away from the wood underneath:

Hover over any image for description / click for full size

I don't know what variety it is (the previous owners planted it), but it's a flowering crabapple with fragrant pink flowers and inedible 2" kidney-shaped fruit. I live in Portland, Oregon, USA which is USDA zone 8a.

My questions:

  1. What is causing this damage and how can I treat it?
  2. Should I be worried about it spreading to my real apple tree which is approximately 20' away?
Niall C.
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1 Answers1

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I volunteered at a heritage garden (shameless plug for a place worth visiting) that had old crab apple and their bark did exfoliate or peel in little scales about two inches high by an inch wide. This is normal for mature crab apple and apple trees. What is in your pictures doesn't look like a mature tree with a trunk over eight inches in diameter and neither is the peeling all over the trunk. Given the diversity of the apple family it's hard to say whether this is normal or not. The real question is: does the tree look healthy and bear fruit?

If it does then watch and wait is my advice. If the tree lacks healthy new growth or fruit then call an arborist for an on-site opinion.

Edit: from the additional pictures I can see that there is healthy bark underneath the peeling area and that the tree does not look stressed. I am in agreement with @Ed Staub that this is normal for apple trees. Dropping bark allows the tree to drop pests and diseases in the top layer.

kevinskio
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