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After three consecutive years of pruning your overgrown lilac in this way, new shoots.

Apr 02, If lilac bushes are already too large or becoming unsightly, however, pruning the entire bush or tree to about 6 or 8 inches ( cm.) off the ground may be necessary.

Keep in mind that you may have to wait for flowers, as it takes about three years for. 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 throughout the branches.

Pruning Lilacs Whether it's an ancient shrub or a vigorous young plant, all lilacs can benefit from some well-placed cuts by Jeff Jabco Photo/Illustration: Jennifer Benner One of the few plants that survived my garden renovation was an old, overgrown lilac. I saved it because it blocked the view of my neighbor’s garage and, more important, it had. Jan 09, You can prune the entire plant back 6 to 8 inches from the ground.

This is a very dramatic method and you won’t most likely not see blooms for 2 years but it works. Note: Check to see if your lilac has been grafted.

Check the main trunk of the Lilac and see if there is a bump and difference in the bark. That would be the graft union. Jun 10, To prune your lilacs, start deadheading in early-to-late spring by cutting the flowers at their base just after they’ve reached their peak. You should also cut any flowers that are already dying so they don’t sap energy that could be used for new shrubhauling.buzz: K.

Dwarf lilacs rarely need pruning ‘Palibin’ Meyer lilac (Syringa meyeri ‘Palibin’) and ‘Miss Kim’ Manchurian lilac (Syringa pubescens ssp. patula ‘Miss Kim’) are both relatively small lilacs with a twiggy shrubhauling.buzz pruning other than deadheading is required on these types. As the plants age, you can remove a few of the oldest stems to make room for younger, more vigorous stems. Proper Pruning Techniques for a Lilac Bush. Mostly carefree and freely flowering, lilac (Syringa spp.) is a much-anticipated harbinger of spring.

One of the first shrubs to come to color in.