![]() ![]() The exact time to prune will depend upon the age of the tree. ‘If you prune outside this period you risk exposing the plant to infection by silverleaf and bacterial canker, both of which can be serious.’ ‘Like all stone fruits, plum trees should only be pruned in their growing season, namely from April to August,’ says Monty Don. In fall and early winter, the tree’s dry and oxygen-rich wood make it an ideal host for fungi. In spring and early summer, the trees resources are devoted to growth, so it is less resilient to disease. Summertime, when plum trees are strong and rich in resources is the best time for pruning as the trees are able to recover quickly.
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