You can start pruning them when they are years old, and have established.

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.

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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. Lilac tree service free mulch bloom only once each year, in spring, but they make new buds after they bloom.

The buds become the next year’s flowers. If you trim a lilac bush too late in the year, then you’ll cut. Aug 21, If you want to prune your lilac to reshape it or to reduce its height, you could do it now, but it would be better to wait until spring. You see, if you prune in August, the lilac may produce new shoots that won’t have the time to harden off properly (prepare for winter) and they could be damaged by winter cold, obliging you to prune again in the bushhaul.barted Reading Time: 2 mins.

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 bushhaul.barted Reading Time: 4 mins.

Jun 14, Take cuttings of lilac bushes from tender new growth in late spring or early summer. Mature growth is less likely to root. Take several cuttings to increase your chance of success.

They are more likely to cause problems than to produce a lot of flowers.

Take cuttings in the morning when the weather is cool and the plant is well-hydrated. Cut 4- to 6-inch lengths ( cm.) of tender, new growth.