Apr 28, To prune your lilacs, start deadheading in early-to-late spring by cutting the flowers at their base just after they’ve reached their peak.
You should also cut any flowers that are already dying so they don’t sap energy that could be used for new growth%(4). Jan 06, Pruning is not important for the first 5 to 6 years of a young lilacs life. It can be an important step to lilac recovery if winter damage has occurred. Wait until the plant has bloomed before you make any cuts to avoid removing the flowers. Cut out any damaged or diseased stumpcutting.buzzg: Burlington MA. Apr 28, Now the plants are getting too tall to see the flowers well.
What do you recommend for pruning lilacs and rhododendrons? - E.W., Boylston, MA. Removing spent flowers - called “deadheading” - is a good idea for many plants, including lilacs, rhododendrons, and mountain laurel. Mar 02, When is the best time to prune flowering shrubs and hedges, such as dwarf cork bushes, azaleas, rhododendrons, and lilacs? - M.S., Mahopac, NY Early spring, before growth begins, is an ideal time to prune flowering shrubs and ornamental shrubs, especially those grown for their foliage rather than their flowers.
Jan 22, When and how to prune trees and shrubs. Hi, Deborah: Thanks for this excellent question. FWIW, what you describe sounds less like pruning and more like tree work necessary for the sake of stumpcutting.buzz that as it may, most deciduous plants are dormant during winter and perfectly OK to actually prune to get rid of dead wood and encourage new growth in stumpcutting.buzzg: Burlington MA.
Aug 21, If you want to prune your lilac to reshape it or to reduce its height, you could do it now, but it would be better to wait until spring. You see, if you prune in August, the lilac may produce new shoots that won’t have the time to harden off properly (prepare for winter) and they could be damaged by winter cold, obliging you to prune again in the stumpcutting.buzzg: Burlington MA.