Department of Energy Argonne National Laboratory Office of Science NEWTON's Homepage NEWTON's Homepage
NEWTON, Ask A Scientist!
NEWTON Home Page NEWTON Teachers Visit Our Archives Ask A Question How To Ask A Question Question of the Week Our Expert Scientists Volunteer at NEWTON! Frequently Asked Questions Referencing NEWTON About NEWTON About Ask A Scientist Education At Argonne Lilac Pruning
Name: Gary
Location: N/A
Country: N/A
Date: N/A

My lilac bushes are about 25 years old and are too tall and produce too few flowers. When and how is the best time to cut them back so I can control their height and produce more flowers. They were shaded by trees but are now in a sunnier area since several trees have been taken down. Also should I feed them - I have never done so in the past. Thank you Gary Spurr

Dear Gary,



Anthony R. Brach, Ph.D.

Click here to return to the Biology Archives

NEWTON is an electronic community for Science, Math, and Computer Science K-12 Educators, sponsored and operated by Argonne National Laboratory's Educational Programs, Andrew Skipor, Ph.D., Head of Educational Programs.

For assistance with NEWTON contact a System Operator (, or at Argonne's Educational Programs

Educational Programs
Building 360
9700 S. Cass Ave.
Argonne, Illinois
60439-4845, USA
Update: June 2012
Weclome To Newton

Argonne National Laboratory