A stone wall can be the ideal place to grow rockery or alpine plants and the combination of the two makes for a doubly attractive feature. Flowers can be planted in a narrow bed on the top of the wall or inserted in cracks on its face. I came across this list of perfect plants for rock wall landscapes on the Bless My Weeds website.
Moss Phlox?comes in gorgeous pinks, purples, and white. It spreads and cascades beautifully, making it a great accent for rock wall landscaping.
Ivy?has an enchanting, timeless charm. These high climbers can scale walls 20 feet or higher!
Moss?gives a natural, earthy look and is an easy way to ?green-ify? a rock wall landscape.
Japanese Forest Grass can?grow out from rock crags in frivolous tufts and add a sense of softness to rock wall landscaping.