With some plants, this helps to stimulate continuing blooms.
Jul 08, When to Prune Lilac Bushes. Many of the newer lilac varieties grow quickly and might need pruning starting in their second or third year. In general, by the time a stem reaches more than 2 inches in diameter, it should be pruned. If you are diligent with annual pruning of your lilac, the shrub will grow to about 8 feet tall with flowers throughout the branches.
Apr 02, How to Prune Lilac Bushes. When pruning lilacs, cutting back the tops of overgrown stems is oftentimes not enough. It is generally better to cut the entire stem.
Trimming lilacs is best accomplished using clippers. Remove spent blooms all the way to the stems to prevent seeding and encourage more blooms later on.
The following spring, begin pruning out the spindly growth, and maintain the healthiest shoots while considering the shape of the plant.
Cut back about a third of the branches. Nov 18, The best time -- and only correct time, really -- to prune lilacs is just after blooming. All shrubs fall into one of two categories; some, like many of the hydrangeas, bloom exclusively on new wood and can be pruned to the ground each fall if required. Others, such as lilacs, bloom only on old wood from the previous season. Thus, if you prune at any time other than immediately after flowering, Estimated Reading Time: 2 mins.
While I'd not hesitate to do rejuvenation pruning on a typical common lilac now, one that is grown in a tree form (single trunk rather than multiple stems/canes from the ground) should be treated a bit differently. Too severe a pruning at this time of year might well jeopardize its future, specially in.