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Jun 17, Do not prune oaks in the late spring or summer because this creates fresh wounds that are attractive to insects that may be carrying the fungus. Prune only during November through mid-April. The disease in trees with less than 30% of the crown affected can be put into temporary remission by injecting a bushdig.barted Reading Time: 3 mins.

Pruning oak trees in winter greatly reduces the risk of an oak wilt infection as the beetles and fungal mats are not present at that time of year. If an oak tree must be pruned in spring or summer (such as after a storm), apply latex house paint to the pruning cuts to avoid attracting sap-feeding beetles to the wounds. Oak trees are best trimmed in the winter between November and March. Oak trees are dormant in winter and are less likely to be negatively affected by pruning when in winter dormancy.

That being said, branches which are dead, damaged, or diseased should be Estimated Reading Time: 8 mins. Anytime between November 1 and March 31 is the best time to trim your oak trees. They are less vulnerable during this time to infestations or diseases that could rot them. Rot in particular can ravage even the largest of trees, leaving them feeble, damaged, and at risk of potentially falling.

The reason it is best to prune your oak tree in the winter months is because of a disease that gets spread to live tissue in the summer months. Oak Wilt is a disease fungus that is spread by insects which are most active from April to the end of bushdig.barted Reading Time: 7 mins.