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A summer with extreme weather will yield fewer flowers.

Nov 17, Home; Who we are? Terms of Use; Drop us a line; Pruning Lilac Bushes: When To Trim Lilac Bushes. Nov 21, Pruning lilac bushes will help enhance their health and flower development.

Like other plants, lilacs will come back stronger the following spring if they properly cared for in the fall.

Remember to keep them well watered and they should be a mainstay in your landscape for many years!

While lilacs tend to be hardy, they do need to be pruned on a regular basis to keep them growing healthy and shrubdrop.buzzted Reading Time: 3 mins. Lilacs should be pruned yearly to develop a good framework of stems and promote vigorous growth that enhances flowering.

Yearly pruning consists of cutting diseased, misshapen, and unproductive stems to the ground. I also thin and remove some stems to encourage properly spaced, vigorous growth. Apr 15, Should I keep removing lilac suckers on stumps of recently severely pruned lilac tree/bush? I have a beautiful lilac tree/bush that is almost 20 years old.

About 6 years ago, the blooms started to get more sporadic. I am a rather new gardener and did a poor job of trying to prune the lilac in order to perk it up and it was recommended to cut it. Jun 12, - Lilacs are wonderful additions to nearly any landscape; however, periodic pruning is vital in order to keep lilacs healthy and looking their best.

Read this article to find out when and how to prune a lilac bush.