Quote:
Originally Posted by David Hare-Scott[_2_]
I would reduce them. You can cut them quite severely if you do it in later
winter to early spring before the sap rises. Just how far you can cut them
depends a bit on conformation but down to 8-10ft would not be out of the
question.
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It is generally recommended to prune plum trees, and other stone fruit, in high summer because of the risk of them getting silver leaf infection if pruned at any other time of year.