Most deciduous trees are best pruned when dormant, in late autumn or winter ... even towards the end of their dormant season, so prune these in mid-summer after new growth has matured.

Dormant pruning, trimming trees and shrubs during ... or summer after the flowers fade. This timing ensures that the buds remain intact, preserving blossoms for the next season,” says Geldseth.

The best way to rejuvenate these plants is to cut them back during the dormant season ... After a summer's vigorous growth, it is a good idea to give your shrubs a light prune in the autumn ...