Timing of pruning forsythia plays an important role in spring flowering. If the bushes are cut down heavily in autumn, they will not flower. It is therefore best to prune forsythia in the spring.
Prune your forsythia after flowering
Prune forsythia immediately after flowering
Forsythia develops most flowers on the previous year's shoots. If these are cut when pruned in autumn, the flowers will fall out the following spring.
The best time to cut forsythia is therefore May or June, when the flowers have turned brown and the first tips of the leaves are showing.
During the rest of the gardening year, the forsythia should only be pruned very carefully for maintenance purposes.
tips and tricks
Winter or very early spring is ideal for rejuvenation pruning, which you should do every two to three years. Only heavily woody shoots are cut back to the ground.