For my herb garden. This one doesn't show you how to do it but looks like a good project to start! It's also great for a tiny patio or yard. Looks like the pots might be too small though. so, build frame bigger according to pot size preferred.
Plastic Bottle Vertical Garden: And on the super green end of the spectrum, you can use turn plastic bottles into an awesome sustainable vertical garden. (via Rosenbaum) How have you repurposed plastic bottles?