France 
It is end of March in Collobrieres in the South of France. We have an old and very beautiful Wisteria about to flower, but it needs some cutting back. Must we wait now until after flowering in July?
29 Mar, 2010
You could trim off any long growths that have no flower buds on them, but it shouldn't grow anymore until after flowering. Sometimes you just have to prune a plant when you can find the time!
29 Mar, 2010