How to make a patio rail garden?
I need to make an instructable on how to craft a box that can be hung on a rail of a patio. I live in a dorm on the third floor and that patio has this protection rail that would be great for said box. The goal here is to grow vegetables that can be harvested and used, or spices, or something that would be fun and help cut down on the costs of something else (Like vegies, i want vegies). I certain one of these already exists, so if some one can point me in the right direction, thatd be great, thanks.