Lilac bushes
what do you do to lilacs mine don't bloom very much at all is it the soil? If so what can i do about it? they are bushy but every year just a few blooms. I love lilacs even though they don't last very long.
Submitted by bestestgrandmaever

Hi, Well lilacs need full sun to bloom well (at least 6 to 8 hours a day) and very old specimens can begin to bloom less often. If your lilacs are over up in years, you might want to rejuvenate them by cutting them back in the early spring before they break dormancy to encourage new growth. Understand that this will prevent you from getting flowers that year (lilacs bloom on old wood), but it will stimulate a lot of new growth. In the meantime, you could give them a good meal, by sprinkling some general-purpose, slow-release fertilizer around the base of the shrubs now.

Answered by doug.jimerson
Community Answers (2)

Hey, Mister Garden Answer Man, There's a great deal more you could have told the Lilac Lover regarding the poor flowering habit of her bush. It would have been nice if you could have been more specific to really help. Lilac bushes need to be trimmed three years in a row and LEFT ALONE on the FOURTH year. The time to trim is just as the flowers are opening UNTIL NO LATER than the FOURTH of JULY as then they are setting next years flowers. PRUNE NO MORE than ONE THIRD of the entire size for best results. ALSO, keep the center of the bush EMPTY...remove all SUCKERS,{ unless you plan to allow ONE to grow to shape the bush in the might become a new branch }.One can prune HARD and cut half away, but it will take two years for the bush to recover and bloom well. Cut more than 50% and you risk killing it. Also, NEVER allow your Lilac to grow very tall. It's best to keep them at no taller than 10 to 12 feet. When they get tall, they stop flowering most of the time. And, yes, the more sun they have, the better they'll bloom.
Submitted by domdeeum2