During the dormant season winter is one acceptable answer, especially for.

Article Summary.

Jul 03, When to Prune Evergreen Shrubs In general, prune needle-bearing evergreen shrubs in early spring, toward the end of dormancy and before the emergence of new growth.

Pruning the evergreens at this time allows plenty of time for new growth to emerge, as well as plenty of time for these new shoots to harden off before the following winter. Sep 25, Late spring is an excellent time to prune evergreen shrubs in the landscape. Pruning just after the emergence of the spring growth will provide a basis for.

Remove one third of the old wood at the ground level.

Prune evergreen shrubs, such as juniper and yew, in late March or early April before new growth begins. Light pruning may also be done in mid-summer. Avoid pruning evergreen shrubs in the fall. Fall pruned evergreens are more susceptible to winter injury.

Deciduous Trees. February through March is generally regarded as the best time to prune most deciduous trees.