Dec 14, Wintertime is a good time for tree pruning, when temperatures are cold, according to Wisconsin Department of Natural Resources tree health experts.
An oak tree dying from oak wilt (middle) and an oak killed by the disease (right). Photo: WDNR Prune trees in winterEstimated Reading Time: 3 mins. Aug 13, Late fall/winter pruning is especially important for oak trees to help prevent spread of the fungus that causes oak wilt (see University of Wisconsin Garden Facts XHT). Late spring and summer are usually not good times of year to prune because disease pathogens are present and wound closure is slower.
Sep 26, So, April-June is the worst time to trim oak trees, as the trees are in full growth mode. Pruning wounds are an easy access point for harmful bacteria and other nasty pathogens. Pruning wounds are an easy access point for harmful bacteria and other nasty shrubhauling.buzzted Reading Time: 8 mins.
Apr 03, To protect oak trees and help prevent oak wilt, the Wisconsin Department of Natural Resources advises people to avoid pruning oaks on their property from April through July. Spring and early summer pruning makes oak trees vulnerable to oak wilt, a fatal fungal disease that rapidly kills trees in the red oak group and weakens those in the white oak group.