Fill Your Deck with Plants - Soften your space with beautiful blooms and lush greenery from container gardens. It's easy to tuck a few containers here and there. Here's a hint: You may not be limited to growing annuals. Perennials and shrubs survive outdoors in containers if the container is large enough, which may be 4- to 5-feet wide in northern climates.
Hens-and-Chicks is an excellent succulent for the rock garden or crevice in the sidewalk. More easy groundcovers: http://www.bhg.com/gardening/flowers/perennials/easy-ground-covers/?esrc=nwgn/?socsrc=bhgpin082213hensandchicks=17