Industrial-style urban courtyard:This green wall, located on the deck level of the courtyard, consists of a steel box frame with hand-thrown pots perched inside. Plants include varieties of mistletoe cactus (*Rhipsalis*) and string of pearls (*Senecio*).
Here is an idea for a vertical garden in a classroom (plus a fish tank). This could also work in other places -- homes, places of worship, community centres, etc. Maybe even outdoors? With a mesh covering over the fish tank, the cats couldn't get in.