Strangled my wisteria!
Hi. I have a wisteria which I have been supporting to grow up my house with horizontal garden wire. To stop the wisteria falling sideways I tired more wire around the plant and then to the horizontal wire. As a result the main trunk of the wisteria has been strangled, stopped growing, and has indents where the wire has been. As a result realy long branches have come from the Base of the plant and now overtaken the main branch. Should I prune the plant to below where it got strangled? If so when should I do this?
Base roots overtaking main stem: