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.
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.
on stems that are not more than 5 or 6 years old. As the stems get older, the flowers become fewer, smaller, and more out of reach. But with proper pruning, a lilac can produce flowers reliably for decades. What technique you use depends on the age of your shrub. Rather, prune each major branch back to a side shoot.
Remember, as with pruning any shrubs or trees, the shoot or bud just below where you prune will grow out in the direction it is pointing. If you don’t want a shoot there, perhaps blocking a walk or path, prune elsewhere. How to Prune a Lilac Properly.
A well-shaped lilac needs annual pruning to retain the rounded form that most gardeners desire. Pruning is also important for controlling the overall height of the shrub. Depending on the variety, these hardy growers can reach up and over 20 feet in height. Jun 10, Fragrant, colorful lilacs are easy to grow in most regions. Whether your lilac is a shrub or a small tree, it will need to be regularly pruned in order to maintain a healthy shape and size.
To prune lilacs, get to work in the spring: cut Views: K.