RE: Chinese Wisteria

Title: RE: Chinese Wisteria
Hi Paul, 
    Since I have never grown Wisteria, I am curious about your statement below.  What happens after you hack at the roots a few feet away from the stem?  Does this promote flowering?  Is it root pruning? What?  Curious minds want to know!
Marilyn Dube'
Natural Designs Nursery
Portland, OR 


I'm sure (root pruning) this is what Paul had in mind.  It is one of the techniques used on wisterias, which are often recalcitrant to bloom.  Other methods include a spiral type of girdling (scoring in a spiral pattern up the trunk so as not to completely sever the cambium layer),  high dose phosphorus in March, and virgorous pruning of side shoots back to 3-4 buds.

I know of no controlled studies on this and my conclusion (having 2 Wisteria florabunda myself) is that they will bloom when they are good and ready!

--
Don Martinson
Milwaukee, Wisconsin
Mailto:llmen@execpc.com

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