Jun 22, Pruning forsythia is essential to control this growth. Trimming a forsythia while it’s young will help control their shape and size.
When to Prune Forsythia. The best time for trimming forsythia is in the spring after the blooms fade. Pruning forsythia in late summer or fall will reduce the number of flowers in the spring since these shrubs bloom on old wood and set their.
Mar 09, With that being said, how do you prune a forsythia bush? In a mature forsythia shrub, cut at least one-fourth to one-third of the oldest, thickest branches close to the ground. For the very oldest and most overgrown forsythia, pruning should be brutal, cropping the entire shrub to about 4 inches (10 cm.) from the ground.
Rejuvenation is simply severely cutting back the plant so that it can grow all new growth. To do rejuvenation pruning on a burning bush, take either a sharp, clean pair of pruning shears or hedge clippers and cut the entire burning bush plant down all the way to about 1 to 3 inches ( to cm.) from the ground.
May 22, 1. Prune forsythia plants right after they finish blooming in the spring. Wait for your yellow flowers to fade and for the leaves to grow. At this point, the plant starts to develop next year's buds, and the plant carries the buds through the fall and winter season. This is the best time to prune your forsythia%.