When should I prune my Oak tree?  Because of Oak Wilt, timing is everything. Oak Wilt is a serious disease that could affect any Oak tree around Green Bay and Appleton. Oak wilt is caused by a fungus that stops an Oak’s ability of moving water throughout the tree. As the water movement throughout the tree slows, the leaves will fall off. The tree can be killed in as little as 30 days leaving a void in your landscaping, although some might take up to one year to die. Oak wilt can be spread underground through roots of nearby oak trees that are touching or on the surface through a beetle that is attracted to the wounds on Oak trees.  All Oak trees, whether naturalized or planted in landscapes, can be affected.

Prevention. Only prune Oak trees in winter. If an Oak is damaged during the summer or needs an emergency pruning (i.e. storm damage) then tree wound paint should be used immediately.  It could only take minutes for Oak Wilt to be spread through the open wound.

Signs and Symptoms.  Here are some symptoms to look for. Leaves turn brown during the growing months, starting from the leaf tip and edges working inward. There may be a very distinct line between the brown and green part of the leaf.  Green, dead, and half dead leaves are dropped from the tree prematurely.

If you want an Oak tree in your landscape pruned, make sure to only prune it in Winter.   If you have any questions about pruning trees and shrubs in your landscape, contact us. For other advice, tips, and information about the latest trends in landscaping check out the rest of our articles.