Knowledgebase
What is white on oak tree wound #942670
Asked August 17, 2026, 12:46 PM EDT
Polk County Iowa
Expert Response
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.
On Aug 17, 2026, at 13:50, Ask Extension wrote: