Jun 22, 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 flower buds soon after new growth appears.
The best time to trim your forsythia to keep its size or shape is right after it finishes blooming which is in the spring time. Always remember to prune a shrub back for enough so that when it grows after a few months it will be the actual size you want.
For example, if you want the forsythia to be 48 inches tall you will want to make you cuts inches below that so that when it grows during the spring and. Jun 01, If you prune before blooming, you risk snipping off all those little yellow flowers you were hoping for.
Forsythia form the next year's blossoms during the season after they bloom, in other words, during the late spring and early summer. 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%.