We've finally contoured the area behind our garage and it's ready for planting. The area is about 25 x 15 feet, sloping, north-facing and about 25 percent covered by a balcony (20 feet up), so it's pretty dry. There is one downspout that I can use to redirect gutter water into the area, if I can figure out how. What to plant? I think most shade-loving plants also love water, so there may not be too many options. Oh, and I want things that are edible, too!
Welsh poppies, bigroot geraniums, lily of the valley, and bluebells come to mind. And hostas. Lettuces on the front edge might work in spring.