Trained trees, such as espaliers, cordons, pyramids and fans should be pruned in late August or early September. When pruning it's essential ... vigorous and very large, with the fruit out of ...

Winter is a great time to prune the trees in your garden ... In some situations, I prune off sections of a large limb to reduce the weight of the limb before making these cuts.

So, whether you grow large plum trees in your borders ... Finally, be sure to prune plum trees at the right time every year. 'Pruning established plum trees is best done in summer,' Drew says.