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Maggie Moran.

Apr 02, Most lilacs don’t require pruning until they reach about 6 to 8 feet ( m.) tall. 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 Missing: Needham Heights. Jul 08, When to Prune Lilac Bushes. Many of the newer lilac varieties grow quickly and might need pruning starting in their second or third year. In general, by the time a stem reaches more than 2 inches in diameter, it should be pruned.

If you are diligent with annual pruning of your lilac, the shrub will grow to about 8 feet tall with flowers throughout the shrublop.buzzg: Needham Heights. Jun 19, The best time for pruning older lilac bushes is right after their flowering has ceased.

This allows new shoots time to develop the next season of blooms. Pruning too late can kill young developing buds. Deadheading, should be done as soon as possible after the flowers shrublop.buzzted Reading Time: 3 mins.

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 shrublop.buzzted Reading Time: 6 mins. As soon as the lilac bush's flowers are dead, trim each flower stem back to the leaves, removing all trace of the flowers.

This step stops the lilac from using its energy to make shrublop.buzzg: Needham Heights.

Aug 27, Implement renewal pruning and proper plant care (watering, mulching, fertilizing) to help the plant recover. Keep an eye on the plant in the season for signs of permanent damage and the possibility the plant may need to be replaced.

Possible replacements for lilac can be found in the Plant Elements of Design plant database. If biotic:Missing: Needham Heights.