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Fortunately, rejuvenation pruning can revive an old lilac in about three years' time.

Jun 26, Lilacs bloom on newer growth, so the blooms will be on the new younger branches growing out from older trunks.

Therefore as the bush gets older and older and puts out more and more new branches, since it blooms better on those newer branches, gradually the blooms are all way up high and unreachable to gather for shrubhauling.buzzted Reading Time: 4 mins.

Mar 31, Mar 31, Blackened, wilted shoots on lilac mean trouble. Lilac blight bacteria over-winter on diseased twigs or on healthy wood. Factors that weaken or injure plants – wounds, frost damage, soil pH, poor or improper nutrition and infection by Estimated Reading Time: 5 mins. 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. Lilacs are known for what is called “sucker growth” which is when the plant sprouts from the root system. Some varieties are more prone to sucker growth than others. Unfortunately, they’re hard to control, because the more you damage the roots by digging or cutting the suckers, the more the plant produces – it’s a stress response.

The reticulata lilacs are somewhat mildew-resistant, definitely trees, gorgeous bark like a cherry, and pretty flowers (but not for smelling - too close to their privet relatives!).

Happy lilac-growing and -smelling to all! Robin. vladpup. 16 years ago. G'Day! - Lynn, of COURSE you can have a baby white lilac.