The Q&A Archives: Splitting Bark On Pin Oak Trees

Question: Our nine year old pin oak trees are developing cracks in the trunk. Otherwise they look great. The cracks are vertical and about 1/4 inch deep. No sign of borers but was wondering if hot dry weather could be causing this.

Answer: What you are seeing is most likely the result of aging bark starting to develop its natural appearance. As a tree matures and its trunk enlarges, the once smooth bark begins to split and develop the look characteristic of the species.

I would not consider this to be any cause for alarm. Thanks and please stop in again soon!

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