The Q&A Archives: Trimming Lilacs

Question: When is the best time to trim your lilac bushes, and how far back do you trim them? Also do you really need a male and female bush for it to grow and produce flowers? Judy Bailey Ashland, OH

Answer: The best time to trim lilacs is after flowering in early summer. You can cut them back severely, because they regrow from the roots and lower branches. However, severe pruning will reduce flowering for a few years. You don't need two lilacs to flower. The flowers are perfect with male and females parts contained in each flower. one lilac will flower fine on its own.

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