Apr 02, When to Trim Lilac Bushes. Knowing when to trim lilac bushes is important. 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 blooms. Pruning lilacs too late can kill young developing buds.
Jul 08, 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.
The time to prune mature lilac plants is just after the flowers have faded in the spring. Jun 26, Timing is the Decisive Factor in Pruning Lilacs.
If you want to have your blooms next year, it is crucial to prune in those first few weeks after blooming ends.
Ideally, this is when you would do maintenance pruning each year. But I get so lazy busy, I end up with a ten foot bush with ten blooms on bushpruning.buzzted Reading Time: 4 mins.
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