Splitting Bark On Pin Oak Trees - Knowledgebase Question

Leavenworth, KS
Question by schroyer
August 28, 1999
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 from NGA
August 28, 1999


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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