Most trees and shrubs that bloom in summer are usually best pruned in.

If your trees and shrubs flower before the end of June, prune them immediately after flowering. Flower buds develop during the previous season’s growth, so the flowers that bloomed this year developed last year and overwintered in the bud.

If you prune before spring flowering, you also remove the flower buds and will eliminate the flowering for that shrubcleanup.bar Size: 1MB. When to prune 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).

The cutting huge redwood trees 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.

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 Videos. Apr 02, Late winter and early spring are ideal times for pruning many shrubs. At this time, shrubs are leafless, so you are better able to see the overall shape of the shrub and easily identify dead, damaged, diseased wood and structural shrubcleanup.barted Reading Time: 3 mins.

Apr 20, DO Prune Flowering Shrubs at the Right Time of Year Spring-flowering shrubs, such as lilac and forsythia, develop buds that will display the following year during the Estimated Reading Time: 5 mins.