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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, Many of the newer lilac varieties grow quickly and might need pruning starting in their second or third year.

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. As soon as the lilac bush's flowers are dead, trim each flower stem back to the leaves, removing all trace of the flowers. This step stops the lilac from using its energy to make seeds.

Lilac bushes are some of the plants which need this for proper, orderly growth. You can start pruning them when they are years old, and have established themselves well. In their case, it is important not only to prune, but also to do so at the right time of the year. Here are certain tips that may guide you on how to prune lilac treeclear.barted Reading Time: 4 mins. 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.

If you are diligent with annual pruning of your lilac, the shrub will grow to about 8 feet tall with flowers throughout the branches.

Ideally, this is when you would do maintenance pruning each year. But I get so lazy busy, I end Estimated Reading Time: 4 mins.