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There is no cure for a plant with this fungal infection.

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. If you are pruning lilac trees or shrubs entirely to within inches of the ground, it is best to do so in early spring.

Sep 21, Prune for height and spread in the late spring or early summer immediately following bloom. Prune following the natural shape of the shrub and only remove what is necessary to prevent when your Meyer Lilac from encroaching on other plants or a structure. Jul 08, Start by taking out the thickest stems first. Although you'll be losing some flowers for the current year, pruning overgrown lilacs is easiest early in the spring before the branches leaf out.

Diseases like 'black knot' spread very easily and if something like that is prevalent in a neighborhood I suggest staying away from cherry and other susceptible trees.

After three consecutive years of pruning your overgrown lilac. If you are simply doing some corrective pruning, do it when dormant and forgo a few flowers for overall plant health as structural pruning is more important than some flowers.

If you are pruning because you think you should prune because that's what everyone does on Saturday morning, then wait until next year after flowering so you don't ruin the show with your dutiful actions.

As soon as the lilac bush's flowers are dead, trim each flower stem back to the leaves, when to trim french lilac bushes, 1923 Danvers MA all trace of the flowers.

University of Vermont Extension.

This step stops the lilac from using its energy to make seeds. Jun 19, 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 buds. Deadheading, should be done as soon as possible after the flowers fade.

Dec 10, Whenever possible, avoid pruning the lilac in summer, fall or winter, because the lilac blooms on growth produced during the previous growing season. Delaying pruning for. 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.