Clematis plants in containers
I'm having difficulty buying a reasonably priced container that is big enough to plant a clematis plant in it. I wanted to plant 2 clematis in an L shape i.e. corner in two big troughs but I can't find any that are reasonably priced (£20 or under) and also sized so that I can fit both in the L shape. Is there a recycled item that I haven't thought of that would be good?
What are the consequences of a clematis not having enough room for its roots? Will it stunt the climbing height or will it affect the flowers?