Clematis for my Pergola?
I have a pergola in my backyard along the top of a fence (about 5' x 30ft and I want to plant a clematis but I never planted one before and not sure what to do. Do I buy more than one plant? What size pot? This area gets afternoon sun.. south/western exposure. The south side has tall cedar hedges along it which provides a bit of shade closer to that edge in the afternoon. I want something that will look good with a white fence. Not pastels, something bold? I like purples, blues, mixed with white. I'm in BC Canada, Zone 8a. I'm not an avid gardener so I need something that is easy to care for, fairly fast grower and not too invasive. Any ideas would be appreciated. Thank you very much.