would you please advise me when to prune wisteria and how much to prune. I have had this plant for years and it seems to have about 2 blooms per year now.
This is a very timely inquiry. The Toronto Master Gardeners website has a great deal of information on this subject that you can access by searching “Pruning Wisteria”. As an example, the article below states that mid-summer is a good time to do a pruning and explains how to do it.
In addition to this the Toronto Master Gardeners Guide “How to Get Wisteria to Bloom” will be helpful:
Hoping you have a lovely summer with your wisteria.