Cutting Back Forsythia Bushes. Keep in mind that forsythia are large shrubs so even with rejuvenation pruning you re likely to quickly end up back where you started. Wait for your yellow flowers to fade and for the leaves to grow.
The time to cut forsythia plants. Pruning forsythia is essential to control this growth. Cutting back forsythia bushes is actually easier to do than renovation pruning.
By cutting some of the main stems of your forsythia bush back to near ground level you will get a continued supply of new stems which will ensure that your forsythia shrubs flower from top to near bottom.
Cut branches back to their point of origin to thin out the canopy. The new shoots are thin and very straight and grow very quickly. If you can t get enough of them this article will help you with propagating forsythia plants. Forsythia bursts into bloom in late winter well ahead of most other early season shrubs.