My neighbor thought he was being helpful in trimming my lilac bush. It is April 10, did he cut the blooms off? I live in Green Bay, Wisconsin.
Certified GKH Gardening Expert
It's certainly a possibility. The best rule of thumb on pruning lilacs is to do it right after the flowers die off in the summer. This article should help you with pruning your lilac in the future: https://www.gardeningknowhow.com/ornamental/shrubs/lilac/pruning-lilac-bushes-when-to-trim-lilac-bushes.htm