Aug 27, S. reticulata the tree lilac, is also susceptible. Whether specific cultivars are affected more than others is unknown mainly because most people don't know the cultivar.
Affected plants are reportedly mature and have"never been a problem" before this year. Symptoms: Leaves turn yellow, then brown, and then drop. In spring, these larva emerge from their eggs and bore into the wood of both lilac and ash wood. As they bore through the wood, they kill the stems, causing leaves to wilt and drop. Jun 27, Do Lilac bushes lose their leaves in the fall? Hardiness Zone: 7a By Roni from Mineola, NY.
Advertisement. Add your voice! Click below to answer. ThriftyFun is powered by your wisdom! Answer. Marj. June 27, 1 found this helpful. I am in zone 5 and I have many lilacs.
The lilac needs a cold-dormant time of year to rejuvenate for spring. Mar 31, Lilac blight is difficult to control and it is recommended that you buy blight-resistant varieties whenever you plant new lilacs.
It also helps to space and prune your lilac plants so they are not rubbing against each other and air can circulate freely between the plants. Do not fertilize late in the growing shrubtrim.buzzted Reading Time: 5 mins. 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.
Aug 24, I have a 9-year-old lilac bush that has done well up until about 2 weeks ago. The bush bloomed beautifully this spring, but recently, the leaves started drying up an falling off. At first the leaves turned slightly yellow and curled a bit, then many of them developed dark brown splotches.
Then the leaves started falling off as if it were.