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. You prune an ever bloomer the same as you would a regular lilac.
They begin developing spring blooms around mid August, so that would be the best time to do it. By doing a little every year you won't loose end of season blooms. Jul 08, If you can't stand the look of your old lilac or you just want a quicker approach, you can take the drastic measure of cutting back the entire plant to about 6 to 8 inches above the ground in the early spring.
Fertilize the plant with compost or a balanced fertilizer to prompt new growth. Jun 26, 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 Estimated Reading Time: 4 mins. It is not necessary to prune Bloomerang lilac in order for it to rebloom.
However, giving it a light trim after blooming does remove the developing seed heads (they look like green bananas, and some people don't care for the way they look on the plant), providing a. Shrub lilacs and bush lilacs are short and compact. Tree lilacs can grow up to 25 feet ( m.) high and have a tree-like appearance, but their many stems tend to get them classified as bushes. They are not technically trees, but they get big enough that you can treat them as if they are. Prune In Late Spring: You must have observed that the lilac bushes bloom only on old growth.
Prune them right after they have finished blooming, and before. Lilacs form new flower buds in the weeks after blooming, so pruning out old wood when deadheading prevents you from cutting out future flowers.