The back of our garage is just a blank wall. It's the only part of the yard that gets no direct sunlight. The wall faces North and the neighbor's house shades it of morning sunshine and the shape of our house shades it from the rest. I've been able to find a variety of plants ideas for the bed...but the wall is so bare, I want a flowering vine to grow up it. Suggestions? Is there a type of clematis that will flower even without any direct sunlight?