Maggie Moran.

Apr 02, The best time for pruning lilac bushes is right after their flowering has ceased. This allows new shoots plenty of time to develop the next season of blooms. Pruning lilacs too late can kill young developing buds. If you are pruning lilac trees or shrubs entirely to within inches of the ground, it is best to do so in early spring. Lilac bushes bloom only once each year, in spring, but they make new buds after they bloom.

The buds become the next year’s flowers. If you trim a lilac bush too late in the year, then you’ll cut. Jul 08, The time to prune mature lilac plants is just after the flowers have faded in the spring.

Lilacs set next season's flower buds almost immediately, so late pruning will mean sacrificing the next year's flowers.   Pruning early also gives new shoots more time and energy to develop, ensuring plenty of blooms for the following spring. Jun 03, Many bushes that flower in spring, including the lilac, are best trimmed in the weeks immediately after the blooms die off. For lilacs that bloomed in May, for example, early June is an ideal time to trim. The new wood created after spring is where some of next year's flower buds form.

May 20, New lilac bushes don't require maintenance pruning until they are about 6 - 8' tall. The time to prune mature best time of year to trim lilac bush plants is just after the flowers have faded. They set the next season's flower buds almost immediately, so late pruning will mean sacrificing next year's flowers.

Pruning early also gives the new shoots more energy to develop. Oct 06, You should resist the temptation to prune or trim your lilac bush until it is at least 6 ft.

tall, which typically occurs during the second or third year of growth. At this point, there will be enough excess stems and blooms for optimal treedelimbing.barted Reading Time: 6 mins.