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. Sep 21, Cut one or two of the lilac's oldest stems back to the base of the plant if the shrub is several years old and becoming bare or scraggly looking at the base. This encourages the growth of new, vigorous stems. If you are simply doing some corrective pruning, do it when dormant and forgo a few flowers for overall plant health as structural pruning is more important than some flowers.
If you are pruning because you think you should prune because that's what everyone does on Saturday morning, then wait until next year after flowering so you don't ruin the show with your dutiful actions. As soon stumpman stump grinder, 1801 Woburn MA 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. Dec 10, Cut one or two of the lilac's oldest stems back to the base of the plant if the shrub is several years old and becoming bare or scraggly looking at the base. Remove lilac blooms from the bush when they start turning brown. Trace the flowering stem back to where horizontal shoots emerge from it. Cut the flower off just above the first set of horizontal branches, using hand pruners. You need to maintain good plant care, and resort to pruning, from time to time.
Lilac bushes are some of the plants which need this for proper, orderly growth. You can start pruning them when they are years old, and have established themselves well. In their case, it is important not only to prune, but also to do so at the right time of the year. Timing is the Decisive Factor in Pruning Lilacs.
If you want to have your blooms next year, it is crucial to prune in those first few weeks after blooming ends. Ideally, this is when you would do maintenance pruning each year.
But I get so lazy busy, I end up with a ten foot bush with ten blooms on top.