Recommendation of the Iowa DNR The best way to prevent the spread of oak wilt is to not prune any oak tree during the growing season. “It’s best to wait until after Oct. 15 to start pruning oak trees,” says Tivon Feeley, with the Iowa DNR’s forest health program. “You can prune your oaks all winter long with the goal…
Read MoreFriday, March 6, 2026
