I started growing clemantis two years ago. I have 2 that I have never pruned and they are looking leggy with blossoms only higher up... I now realize I need to prune them to prevent this but is it too late. One is a polish spirit and I think the other is Jackmanji Should I prune now to about 6" or wait till the fall? I live in Southern NH.
Any advise would be greatly appreciated.