We have two, well-established six-foot tall lilac bushes. They are beginning to bud. When is the best time to trim them?

Answer

Trim the plants after they are done blooming. They begin to form buds for the following year towards the end of the summer. If you wait too long to trim them back, you may not have any blooms the next year because you'll have trimmed off the buds.

Updated on April 30, 2018

Original Article:

How to Grow Lilac Bushes
By Charlotte Gerber
working