Lilac Bushes With No Blooms at All
Last year I had beautiful blooms on my lilac bushes, but this year nothing at all. The plant itself seems fine, but no buds.
Certified GKH Gardening Expert
A lack of phosphorus in the soil is one of the most common reasons. This article will provide additional causes: https://www.gardeningknowhow.com/ornamental/shrubs/lilac/lilac-bush-not-blooming.htm