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Apr 02, Knowing when to trim lilac bushes is important.
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Most lilacs don’t require pruning until they reach about 6 to 8 feet ( m.) tall. The best time for pruning lilac bushes is right after their flowering has ceased. This allows new shoots plenty of time to develop the next season of treehaul.clubted Reading Time: 2 mins.
Jul 08, If you can't stand the look of your old lilac or you just want a quicker approach, you can take the drastic measure of cutting back the entire plant to about 6 to 8 inches above the ground in the early spring. Fertilize the plant with compost or a balanced fertilizer to prompt new treehaul.clubted Reading Time: 7 mins.
May 26, In the spring after it has bloomed, when you cut it back again, trim your lilac tree to one foot shorter than the height you want it to reach during springtime. When you prune a lilac tree, you want to give it as much of a chance to be healthy and strong. Cutting it back like this is helpful to your lilac tree.5/5(1). Oct 26, There are plenty of sources of information, each one contradicting the next one.
And when I searched for information about lilacs, a few sources mentioned cutting the lilac back in spring, others suggested the fall. Some said ‘cut back hard’ while others said ‘don’t cut too much’.Author: Plowing Through Life (Martha).