May 20, When to Prune Lilacs. New lilac bushes don't require maintenance pruning until they are about 6 - 8' tall. The time to prune mature lilac plants is just after the flowers have faded. They set the next season's flower buds almost immediately, so late pruning will mean sacrificing next year's flowers. Jun 19, Knowing when to trim older lilac bushes is important. Most lilacs don’t require pruning until they reach about 6 to 8 feet tall.
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 stumpgrind.buzzted Reading Time: 3 mins. Jul 08, The time to prune mature lilac plants is just after the flowers have faded in the spring.
Lilacs set next season's flower buds almost immediately, so late pruning will mean sacrificing the next year's flowers. Pruning early also gives new shoots more time and energy to develop, ensuring plenty of blooms for the following spring. 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. Oct 06, You should resist the temptation to prune or trim your lilac bush until it is at least 6 ft. tall, which typically occurs during the second or third year of growth.
At this point, there will be enough excess stems and blooms for optimal shaping. Jan 31, Knowing when to trim lilac bushes is important.
Most lilacs don’t require pruning until they reach about six to eight feet tall. The best time for pruning lilac bushes is right after their flowering has ceased. Apr 12, Lilac only bloom in the spring and then remain leafy and green until fall.
I was told it is best to trim the blooms as they begin to die.
You can trim them back a bit throughout the summer, but for a full trim it is best to wait until fall. It will grow back nice and full in the spring. Happy bush trimming! Spring, however, before the leaves pop out, is best.
Fall (September through late October) is second best. Lilacs love manure, be it bagged or au natural; compost also is good, as is fertilizer. Now and then, sprinkle a little lime or wood ashes around your plants because they appreciate near-neutral soil.