Garden Trivia Answer
December to February is the best time to prune oak trees. Pruning oak trees in winter greatly reduces the risk of oak wilt, a deadly fungal disease. The disease spreads when sap-feeding beetles carry spores from infected trees to fresh wounds on healthy ones, to which the insects are particularly attracted. In winter, these insects are not active, and the fungus that causes oak wilt is not producing spores, making it the safest time to prune. Learn more in this article: Pruning Oak Trees to Avoid Oak Wilt.
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