I did not know about WALL GARDENS.
There is actually a big, artistic move to go VERTICAL with gardening. You can see stuff about it here.
The European version: http://www.verticalgardenpatrickblanc.com/mainen.php
The American version: http://www.gardenbeet.com/vertical-garden.html
An explanatory video:
But I wouldn’t have known anything about that if I hadn’t run across this: the ghetto-version of the “movement” which is somewhat intriguing, I must say.
I personally don’t plan to try this, but people with patio homes, apartments or hot, south-facing sides of their homes say they benefit. It is kind of cute and organized-looking, which does hold some appeal for me. Check out HOW-TO at: