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However, if you prune too late in the summer, you.

Pruning lilacs soon after flowering has finished removes unsightly spent blooms. Shortly after bloom is also the best time to prune the lilac for shaping and rejuvenation, as the lilac begins to. Apr 02, 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. Apr 28, To prune your lilacs, start deadheading in early-to-late spring by cutting the flowers at their base just after they’ve reached their peak.

You should also cut any flowers that are already dying so they don’t sap energy that could be used for new growth%(4). May 20, Don’t wait too long, as next year’s blooms start forming in the summer. You don’t want to cut them off by mistake. Pruning in the winter will remove all the bloom for the following spring. If your lilac is very thin and lanky, renovate it by removing the oldest branches gradually over two or three consecutive seasons, always in the late shrubtrim.buzzted Reading Time: 2 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. 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. Jul 22, Jul 22, Begin pruning lilacs three or four years after planting.

Overgrown lilacs may need to be cut back to just a few inches above. Sep 17, Sep 17, When pruning this way cut out any dead or weak canes, then cut out 2/3rds of the suckers or shoots coming up at the base, leave 1/3 for future blooming stems. You can actually dig the suckers up and pot them to make more lilacs if you wish, they actually mature faster than taking cuttings and rooting them.