I have a new wisteria vine which grows in a ten gallon pot. I live in a Zone 4-5 region in southern Ontario, Canada. How much can I cut it back before the winter without affecting next year's blooms? It is 5 feet long. It is out of control and I want to prune it back now that it's October. If I trim it back aggressively, will it survive the winter? Will it have no blooms next year due to cutting it back? It only had about 5 tiny blooms this year (about 2 inches long). Should I store it in the garage over winter in its pot or leave it outside?
Cutting Back Wisteria
Certified GKH Gardening Expert
Here is a link with pruning information.