I'm a beginner gardener and I'm new to the site, so I appreciate your help! I have alot of trees in my backyard and it is pretty shaded along the back (moss grows, not much grass). I was hoping to plant ground cover as a border around the entire backyard. I need something that will grow mostly in the shade, doesn't require alot of care (no sprinkler system!) and preferably something that flowers. (also something that doesn't get out of control because I don't want it to start taking over my entire backyard) Any suggestions?