I have had a lot of fun making these two gardens. A friend of mine made the boxes out of weathered 2x4s cut down and put cleats on the bottoms. I used a black plant tray to line them to prevent leaking. A thin layer of charcoal to keep the soil 'sweet', cactus mix then decomposed granite for the cactus garden. Potting soil and moss for the Fairly garden.
Judy
Cactus and Fairy mini-gardens