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Remove spent blooms all the way to the stems to prevent seeding.

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. 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.

Use sharp pruning shears to avoid leaving ragged ends that might invite disease.

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. The Best Time to Trim a Lilac Bush. Lilac bushes are capable of producing huge quantities of blooms in colors ranging from pure white to deep purple. Many varieties' flowers have a strong.

True, pruning early-flowering deciduous shrubs at this time will reduce or eliminate blossoming in spring that year, but the trade-off is in gaining healthier shrubs that will bloom more vigorously for the long run. Rejuvenation pruning is commonly done on overgrown lilac shrubs. They are one of the shrubs that respond well to this kind of pruning. 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. 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. Jun 23, Shrubs that bloom later than spring usually form flowers on their current year’s new growth; these are best pruned before new growth begins in spring, or in late fall/winter when they are dormant.

Some of these are roses, Buddleia, Clethra, honeysuckle, hibiscus, Hydrangea paniculata & arborescens and spiraea. Prune your lilac bushes in the springtime, immediately after flowering.

Salvage any lingering blossoms by cutting them and placing them in vases of water. Cut back about one-third of the growth on mature trees to keep your shrubs uniform and attractive. Select thick. Apr 02, How to Prune Lilac Bushes. When pruning lilacs, cutting back the tops of overgrown stems is oftentimes not enough. It is generally better to cut the entire stem.

A lilac bush does best when it is trimmed every year.

Trimming lilacs is best accomplished using clippers. In addition to pruning flowers just past their peak, prune those that are already dying.