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Tom, Hi I have some LiLACS and they dont have many flowers in the Spring. Someone told me thry should be cut back. When shoulf they be cut back, which month,  How much should they be cut back. ANY other thoughts on getting them to bloom I live in New York. Thank you for yoir help - Ken

Hi Ken,
Thanx for your question.  Prune back lilacs right after they bloom.  Prune them back severely when they are unruly and out of control.  I would just trim them back every year, after they bloom.  If you trim later, say in the fall or will remove any chance of new blooms for the coming season.  I hope this helps.


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Tom Alonzo


I have been a gardener for 20 years with perennials both growing from seed and from nurseries. I went through the Master Gardener Program from Kansas State University Cooperative Extension Service and I answered questions on the Hotline a few years ago for the Wyandotte County Kansas Extension Service. I have also lived in the Florida, California, Hawaii, Arizona, Texas, Kansas and Missouri and am experienced with a variety of climates, soils and weather conditions.


I have been growing perennials for over 20 years now. I am self-taught mostly except for a master gardener class. I have experimented with all kinds of perennials including many that are not common to my area. I have read hundreds of books and grown hundreds of varieties of plants and hope to make it a business some day. I have become versed in botanical names and growing conditions and what I don't know off of the top of my head I can usually easily find in my vast array of research material and botanical and horticultural contacts. I especially enjoy experimenting with growing plants out of zone.

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