Building Raised Beds on a Brick Patio: Use Segmental Block, Not Loose Brick

Stacked loose bricks are unstable at 3–4 ft height. Use interlocking concrete segmental blocks (Pavestone, Anchor, Keystone). They're engineered for vertical walls, come in many colors/textures, and install with gravel base and geogrid reinforcement. Visit a hardscape supplier to see samples. It's the only safe, lasting way.