Newly planted lilacs usually do not need pruning for 2 to 3 years and it will take 1 or 2 years before a lilac blooms. Years later, lilac stems can grow very large and tree-like and they will tend to shade out new growth at the plant base.
Use a lopper or hand saw to remove a third of the thickest stems at the base. 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 spring.
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 branches. 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 shrubdelimbing.buzzted Reading Time: 3 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 seeds. May 29, Buds are set on old wood, so the best time to prune is right after lilacs bloom in early summer.
In addition to deadheading, you will want to remove branches that are dead, distorted or diseased. Lilacs benefit from fairly serious pruning, but never remove more than one-third of the bush.