The best time for pruning lilac bushes is right after their flowering has ceased. If you are pruning lilac trees or shrubs entirely to within inches of the ground, it is best to do so in early spring.
New shoots will develop during the regular growing season as long as there are a few healthy shoots left. Lilac bushes bloom only once each year, in spring, but they make new buds after they bloom. The buds become the next year’s flowers. If you trim a lilac bush too late in the year, then you’ll cut. Mary: Your lilac-loping tale of woe illustrates the serious negative long-term effects Fall pruning can have on the health of plants.
Apr 02, If lilac bushes are already too large or becoming unsightly, however, pruning the entire bush or tree to about 6 or 8 inches ( cm.) off the ground may be necessary. Keep in mind that you may have to wait for flowers, as it takes about three years for them to develop once the entire shrub has been cut. 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.
. One possibility- lilacs flower on the growth that occurs after the last flowering- so if you prune in the fall, you’ll be pruning off the branches that would otherwise flower the next spring. Jun 10, To prune lilacs, get to work in the spring: cut fresh flowers for bouquets, nip off the longest stems, and thin out any weak stems at the base.
Avoid pruning late in the summer or fall since doing so can limit future bushfall.buzz: K.