Why Will My Three Lilac Bushes Not Bloom?
I have three lilac bushes. Two are in the sun for more than eight hours; one is not. But none will bloom. Their foliage is awesome, and they are very healthy looking.
Certified GKH Gardening Expert
There are several reasons for why this may be happening. This article should help: https://www.gardeningknowhow.com/ornamental/shrubs/lilac/lilac-bush-not-blooming.htm