Rejuvenation Pruning for Leggy Lilacs and Saving a Crowded Tree

Hard Pruning Overgrown Lilacs

Three 15-foot leggy lilacs in a new home's yard need drastic renewal. Conflicting advice on timing (spring vs. fall) and height.

Best Practice

• Timing: Early spring or late fall.
• Cut Height: Leave 6–10 inches (15–25 cm) above ground—NOT to the ground.
• Result: Stimulates vigorous sucker growth from base.

The Crowded Corner Tree

A 17-foot skinny tree with one branch, shaded out by lilacs. Likely not salvageable. Remove it and replace with a shade-tolerant understory tree or shrub after lilacs are rejuvenated.