I'm in the process of designing and planting a new flower bed and think that I would like to include some vines. My yard actually presents itself as a microclimate where I can grow up to zone 5 pretty successfully depending on snow cover which recently hasn't been a problem. My entire space is 17 x 17.5 feet with a 6 foot fence. The first area where I would like to include a vine [supported by a trellis or obilisk] is in the sw corner an area that gets some sun from about 8-12 but then is in shade - I should mention that my yard gets really hot during the summer because of a straight south location and white stucco and cement. I am going to plant a bugbane brunette in the same area but would like something to provide a backdrop and some extra height at least as tall as the fence. Any suggestions?