More to explore:
Potato Growing Bags
How To Grow Onions Vertically On Your Window Sill
Simple Steps to Grow a Hundred Pounds of Potatoes in a Barrel
Grow indoor plants upside down with Sky Planters. I would stick to plants that are naturally vining maybe. Spider, Swedish ivy, etc
Grow strawberries in gutters. This is brilliant! Keeps the berries off the ground and away from bunnies and neighborhood children!
How to Grow Mushrooms at Home
Rose bush cutting stuck into a potato and planted will produce another rose bush.
How to grow potatoes
How to grow a lemon tree indoors
potato tire towers... potatoes like to be buried a couple times as they grow.. this looks like one easy way to do just that..
Grow a hundred pounds of potatoes in a barrel
how to build a rail barrel system for less than $100