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Thick lilac stems can be very tough.

Jun 19, Knowing when to trim older lilac bushes is important. Most lilacs don’t require pruning until they reach about 6 to 8 feet tall. 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 stumpcutter.buzzted Reading Time: 3 mins. May 20, The time to prune mature lilac plants is just after the flowers have faded. They set the next season's flower buds almost immediately, so late pruning will mean sacrificing next year's flowers.

Pruning early also gives the new shoots more energy to develop. How to Prune Lilacs (Maintenance Pruning). If you trim a lilac bush too late in the year, then you’ll cut off unwanted branches and next year’s blossoms.

The ideal time to prune is just after the bush finishes blooming for the year. 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.

Jan 31, New lilac bushes don't require maintenance pruning until they are about 6 feet tall. The time to prune mature lilac plants is just after the flowers have faded. They set the next season's flower buds almost immediately, so late pruning.

May 12, Plants; By Denise Ann Elizabeth. Asked on May 12, When is the right time of year to prune lilac bushes. Answer + 1. Answered 4 answers. Oct 06, While a little care is required to keep plants healthy and strong, getting too happy with the pruning shears early in the life of flowers like the lilac results in stunted or dead plants.

You should resist the temptation to prune or trim your lilac bush until it is at least 6 ft. tall, which typically occurs during the second or third year of growth. Mar 02, Mar 02, Spring is the best time to prune ornamental and flowering shrubs like lilacs and azaleas. Learn more about how and when to prune shrubs. Jun 03, Many bushes that flower in spring, including the lilac, are best trimmed in the weeks immediately after the blooms die off.

For lilacs that bloomed in May, for example, early June is an ideal time to trim. The new wood created after spring is where some of next year's flower buds form.