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Sheri Maze Apr 11,

Jul 08, When to Prune Lilac Bushes. Many of the newer lilac varieties grow quickly and might need pruning starting in their second or third year.

Look for gopher holes near the lilacs, and trap them with a Victor trap or something similar.

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. 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 shrubnotch.buzzted Reading Time: 3 mins. 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. Jun 10, To prune lilacs, get to work in the spring: cut fresh flowers for bouquets, nip off the longest stems, and thin out any weak stems at the base.

Avoid pruning late in the summer or fall since doing so can limit future shrubnotch.buzz: K. Oct 06, 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. At this point, there will be enough excess stems and blooms for optimal shaping. Jun 26, A lilac shoot takes around three years before it delivers a blossom. So plan to take out 1/3 of the bush every year, choosing the most seasoned stalks.

Chop them down to simply over the degree of the dirt. As you do, permit another shoot to develop, to supplant every old one you evacuate.

After three consecutive years of pruning your overgrown lilac in this way, new shoots should comprise the bulk of the plant.

Shrubs. Pruning young shrubs is not as critical as pruning young trees, but take care to use the same principles to encourage good branch structure. Container-grown shrubs require little pruning.

When planting deciduous shrubs, thin out branches for good spacing and prune out any broken, diseased or crossing or circling roots. Aug 27, Pruning off damaged branches could prevent further damage. Monitor next spring as lilac starts blooming for the adults and set traps using pheromones (see Lilac borer). Sprays can be applied. Contact a certified arborist for treatment. If you believe the damage is likely caused by a pathogen, submit a sample to the UMN Plant Disease Clinic.