No, like flowering bulbs, cutting the flowers makes for better flowers next year, because you prevent plant energy spent on growing seeds. I cut off all the flower clusters when they fade on my very young bushes, so they use energy on growing, not seeds.
Apr 02, 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, Lilac bushes will typically flower without any effort from you. However, if left to grow and spread on their own, common lilacs will eventually only flower on the tops of the uppermost branches. Thus, you should be pruning lilacs annually to maintain their form and create a balance of new flowering shoots and older stems. . Jun 14, Take cuttings of lilac bushes from tender new growth in late spring or early summer.
Mature growth is less likely to root.
Take several cuttings to increase your chance of success. Take cuttings in the morning when the weather is cool and the plant is well-hydrated. Cut 4- to 6-inch lengths ( cm.) of tender, new growth. Apr 02, Quite the contrary! You've picked a fine time to cut the lilacs. If you cut them while they're blooming, you'll not only get to enjoy them indoors, you will also be preventing the blossoms from wasting their energies on producing sterile seeds, so that next year they'll have better blossoms.