We have a well established wisteria plant trained up the side of the house. It is rooted in a concrete path right next to the house and over 30 or so years it has attained a height and spread of about 15 feet.
Due to damp problems on the wall, the wisteria has to be taken away from the wall and re-positioned. Would it be feasible to retrain it over an arch, away from the wall, or would it be better to prune it back and retrain it when it grows back? Can wisteria withstand such heavy pruning?