More to explore:
This outdoor staircase design with retaining wall also does double duty by incorporating an herb garden into the slope.
Retaining Wall & Raised Bed.
Backyard DIY herb garden stairs; great way to adapt gardening to slopes. Hgtv.com
Terraced planters - The retaining wall is filled with lush plantings for an intimate, private backyard.
retaining wall planters garden ideas!!!!