Trimming of Oak trees - Ask Extension
Hello, we are planning to have our old oak trees trimmed and dead wood removed soon but I would like to be sure that it is safe to do so at this time....
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Trimming of Oak trees #948179
Asked November 06, 2026, 11:48 AM EST
Hello, we are planning to have our old oak trees trimmed and dead wood removed soon but I would like to be sure that it is safe to do so at this time. I am in Stillwater, MN and we had a frost this morning, 11/6 and I believe this is our first. It is safe to trim now?
Washington County Minnesota
Expert Response
Patricia,
If the branch is already dead, then you can remove it now. For branches that are still alive, I would wait until late winter (around February) to do so.
Historically, oak wilt risk in our area is highest in April and lasts until July. Real-time risk based on weather models can be found here.
Best,
Shane
