The best time for pruning most plants is in the early spring while the plants are still dormant. Spring flowering shrubs may be pruned at that time, but flowers for that season will be lost.
For that reason, spring flowering shrubs are usually pruned as soon as flowering has been completed. In general, the best time to prune trees and shrubs is during the dormant season.
Major pruning, in which more than 15 percent of the top of a plant is removed, is best left until early spring (February or March). Prune these shrubs in late winter or early spring before growth begins. Do not prune deciduous shrubs in late summer. Pruning shrubs in August or early September may encourage a late flush of growth.
This new growth may not harden sufficiently before the arrival of cold weather and be susceptible to winter injury. Pruning on deciduous material should be done in the winter when the plant is dormant. This reduces the amount of stress the plant will incur. Pruning on evergreens is best done in spring and fall. However, on either type of plant, deadwood can be removed at anytime safely, so long as proper techniques are used. Aug 10, Probably the best time from the standpoint of the health of a plant is to prune in late winter or early spring just before new growth resumes for the year.
However, there are exceptions depending on when a plant flowers or other characteristics (such as sap “bleeding” on maples) that may require pruning at other times of the bushfelling.buzzted Reading Time: 5 mins. Fall/early winter pruning can reduce winter hardiness Snap candles (new growth) in half when needles are ½ to 2/3 their normal length Originally published as Virginia Tech Publicationauthored by Bonnie Lee Appleton, Extension Nursery Specialist and Susan C.
French, Research Specialist.