Trimming oak trees in the summer months can be done, but it should be approached with caution and adhering to specific guidelines to minimize stress and potential harm to the trees. Oak trees, in particular, are susceptible to a fungal disease called Oak Wilt, which can be transmitted through open wounds during pruning.

To reduce the risk of Oak Wilt infection, consider the following recommendations…

1. Timing – The ideal time to prune oak trees is during their dormant season, which typically occurs in late fall, winter, or very early spring. Pruning during the dormant season minimizes stress on the tree and lowers the risk of Oak Wilt transmission.
2. Avoid Pruning in the Spring and Early Summer – Oak Wilt is most active during the growing season, which includes late spring and early summer. To protect your oak trees from potential infection, avoid pruning them during this period, especially from April to June when Oak Wilt is most likely to spread.
3. Prune Only When Necessary – Limit summer pruning of oak trees to vital maintenance, such as the removal of dead, diseased, or hazardous branches. If pruning is necessary during the summer months, do it as early in the season as possible to reduce the risk of infection.
4. Use Pruning Paint – When making cuts on oak trees, especially during the growing season, use a pruning paint or sealer to cover the wound as soon as possible. This helps create a barrier that can deter the transmission of Oak Wilt.
5. Sterilize Tools – Ensure that your pruning tools are clean and sterilized before and after each cut to prevent the spread of disease between cuts.
6. Dispose of Pruned Material Properly – Promptly remove and dispose of any pruned oak branches, leaves, and debris from the area. Avoid leaving them in contact with healthy oak trees or near susceptible oak trees.
7. Consult with a Professional – If you have concerns about pruning your oak trees, particularly during the growing season, or if the trees are large or require extensive work, consider consulting with a certified arborist or tree care professional. They can assess the situation, provide expert guidance, and take necessary precautions to protect your trees.

Pruning oak trees, especially during the summer, should be approached with caution to minimize the risk of Oak Wilt and stress on the trees. Following these guidelines and consulting with a professional can help ensure the health and longevity of your oak trees.