My lilac bushes are about 5 years old, have never been pruned and are now almost 8 ft tall! AND, unfortunately it is already nearly July. . . . is there anything I can do to help them grow better next summer, regarding pruning them?
Certified GKH Gardening Expert
This article will help with that: https://www.gardeningknowhow.com/ornamental/shrubs/lilac/pruning-lilac-bushes-when-to-trim-lilac-bushes.htm