Apr 02, Knowing when to trim lilac bushes is important. 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. Lilacs set flower buds for the next year right after blooming is finished, so prune immediately after flowering.
For more about lilac issues and solutions see What’s wrong with my plant? Powdery mildew on lilac leaves. If you trim a lilac bush too late in the year, then you’ll cut off unwanted branches and next year’s blossoms. The ideal time to prune is just after the bush finishes blooming for the year.
Aug 27, Implement renewal pruning 55045 Lindstrom MN 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. I cut off all the flower clusters when they fade on my very young bushes, so they use energy on growing, not seeds. Lilac bushes SHOULD be cut, they are FOR being enjoyed where you want them in vases or being given away.