Hopefully this is what my garden wall will turn out to look like one day. We're off to a good start!
Retaining wall idea, would love grass to go up to edge like this!
Google Image Result for http://www.homedesignersoftware.com/usercenter/design-articles/images/retaining%2Bwall/B.jpg
Creeping thyme is a very short flowering ground cover. It looks especially good spilling over a stone wall, as in this picture. Learn more at http://landscaping.about.com/od/herbplants/p/creeping_thyme.htm
Stone wall - should try this on the back of the garage - raise the bed and use the stone wall.
dry stacked rock walls | Dry stone wall, New England style, and colorful garden.
Stone wall construction: Step-by-step directions with photos for building a stone wall in a weekend! | Living the Country Life | http://www.livingthecountrylife.com/gardening/stone-wall-construction/
IDEAS: Planted Pockets Give Life to Stone Walls. Fill cracks and crevices with drought-tolerant plants for a been-there-forever look
How to build a dry stone wall that will last for centuries.
Why don't my stonewalls look like this? gorgeous!