We could have something similar to this. Instead of being soil filled, though, they could by of a hydroponic setup with water spilling over from one tier the the next below.

A stunning vertical garden idea - something like this for a backyard veggie garden would be amazing!

drawer planter box, buy drawers at restore, replace hardware with stencil

Old Dresser Drawer Planter - have the drawers, and the space picked out, just need to add dirt and plants!