Knowledgebase

What is white on oak tree wound #942670

Asked August 17, 2026, 12:46 PM EDT

I cut a major branch off my mature oak tree eight years ago and the healed wound developed white patches. Do I need to treat it with something?

Polk County Iowa

Expert Response

Hi Michael,

I shared your question with our Horticulture specialist and here was their response:

No wound sealant or treatment is recommended or needed. Just make sure to only prune branches on oaks during the dormant season.
Thank you!

On Aug 17, 2026, at 13:50, Ask Extension wrote:


The Question Asker Replied August 17, 2026, 3:30 PM EDT

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