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- From: gellmore@pearl.tufts.edu
- Newsgroups: rec.gardens
- Subject: RE: Lilac pruning
- Message-ID: <1993Jan25.142358.1@pearl.tufts.edu>
- Date: 25 Jan 93 19:23:58 GMT
- Sender: news@news.tufts.edu (USENET News System)
- Organization: Tufts University - Medford, MA
- Lines: 35
-
- Lilacs sprout freely from suckers, so they CAN be mowed to the ground, but that
- is going to look terrible. Neglected Lilacs not only get too tall to see any
- flowers, but they also sprout so many whip-like suckers that there is little
- air and light on the inside of the shrub to support balanced plant growth.
-
- To prune (YES, winter is dormant season, get it done before March!), saw
- EVERY thing down EXCEPT 4 or 5 main trunks. That will get rid of the
- excessive bushiness. Then on the remaining 4-5 main trunks, if growth
- is too high, cut off the top on third. Yep, it'll look like a flat top, but
- flowers will bloom from branches that begin to form this Spring.
-
- Professionals keep those lilac shrubs low enough (lower than 10 feet) to give
- their owners the chance to see the flowers. I keep mine at about feet.
-
- Granted, when you mow off the top of your tree-like lilacs, you are going to
- feel as though a mistake has been made. Trust me. If not, try pruning one, and
- leave the others go. See which you prefer after a year of two.
-
- The stubs will look pale now, but will darken with age. If you want, spray some
- grey paint on the fresh cut, but its for your eyes, not the plant. Open wood
- is better than any efforts to cover it.
-
- Note that lilacs, like many woody plants, bloom heavy on ALTERNATE years.
-
- Finally, what about cutting off wilted flowers to improve growth? Its not
- worth the effort, provided you fertilize the plant a bit in the spring.
- and fall. The idea is to cut off wilted flowers that are on their way
- to making seeds, thereby saving resources that the plant would have put
- into those seeds. Fact is, that seeds are made within 6 weeks of flowering, and
- if you don't get the old flowers off within 3 weeks of flowering, you will have
- lost any marginal advantage that might have been gained. My experience is that
- the garden keeps me WAY too busy at Lilac flowering time, for me to snip off
- spent flowers. But maybe I'm not devoted enough...
-
- Good luck, and cut, cut, cut.
-