I live in Liverpool in the north of England. It probably gets down to minis 10 degrees. I have bought four clematis plants in plastic pots. I think it is too late to plant them out although they are still in bloom. They are all about 30 inches high. My question is what is the best way to overwinter in these pots ? Also should I prune them after flowering ?. I was told to prune them to 6 inches above the soil although I am rather dubious about that advice. Also to wrap the pots in bubble wrap which I think is a good idea.
Thanks in advance.
As you see from the photos I have a plastic mini greenhouse. Should I store the pots in there overwinter ?.
