I planted a wisteria vine about two years ago and its been growing fine. I'm not sure which variety it is, but i think i remember the tag showed pink blooms. Haven't seen it bloom yet. Anyways, last month it started to grow its new leaves and some shoots that started to travel up the trellis. Then about a week later this terrible freeze came through. I happened to be out of town so i couldn't cover them. All of the leaves and the new shoots have turned brown from the cold. Should I just let it be? Or, should i prune the whole vine back in hopes that it will start over again? Its been about a week of nice warm weather but i don't see any green appearing? I will be totally lost if my whole vine is damaged. Thanks in advance.