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5. Prune three of the oldest stems at ground level, beginning in the lilac’s third growing season. Removing old growth renews the lilac and provides aeration for the center of the plant.

If the. 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. 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. Dec 10, Cut branches back selectively to shape the dwarf lilac bush as desired, removing no more than one-third of any stem and making a clean cut just above a bud facing in the desired direction.

At ' they are small compared to the common lilacs ('; perfect to sniff from a second floor window), but not tiny enough to be cast alongside Snow White. S. meyeri grows to about 8', S. chinensis to nearly 15'. So if you want a dwarf lilac to remain less than 8' or a common lilac to be less than 20', plan to prune it regularly.

HOW TO PRUNE A LILLAC BUSH IN SPRING! Ever wondering what time of year to trim your Lillac bush? OR do you think your Lillac bush looks overgrown? Then this.