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With some plants, this helps to stimulate continuing blooms.

Jul 08, The time to prune mature lilac plants is just after the flowers have faded in the spring. Lilacs set next season's flower buds almost immediately, so late pruning will mean sacrificing the next year's flowers.   Pruning early also gives new shoots more time and energy to develop, ensuring plenty of blooms for the following spring.

Jun 19, The best time for pruning older lilac bushes is right after their flowering has ceased. This allows new shoots time to develop the next season of blooms. Pruning too late can kill young developing buds. Deadheading, should be done as soon as possible after the flowers fade. The old flower cluster should be cut off at its base- just above the two new shoots that angle out from the stem.

This Estimated Reading Time: 3 mins. Prune In Late Spring: You must have observed that the lilac bushes bloom only on old growth. Prune them right after they have finished blooming, and before they have started budding for the next year’s show. They are perennial plants that bloom in the spring. Nov 27, Generally, lilacs do not need to be cut back until the plant reaches eight to ten feet tall.

However, the best time to prune the entire bush down to the ground is at the beginning of spring. Lilacs should be cut back annually. How to Prune Lilacs. 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 top.

It should be easy to see a graft union, where the scion wood of the cultivar joins the root stock several inches above ground level.

Jun 10, This type of pruning goes beyond a lighter annual pruning to severely cut the bush or tree back, allowing for new growth to occur. Do your assessment in early spring, before the lilac has come back to life. This is the best time of year for a deeper bushfelling.buzz: K.