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:

http://www.instructables.com/id/VERTICAL-VEGETABLES-quotGrow-upquot-in-a-smal/

Someone-try it and tell me how it goes!