I have a bunch of aluminum foil dishes that are maybe 3" deep:
I'm going to fill with soil and put on the roof of my apartment building. How should I prepare the container? Specifically, how do I take care of drainage?
I was going to just prick it with pin holes a bunch of times, and then rest it on a few sticks or something to keep it technically off the ground so it will drain. Do I need to put anything in at the bottom of the dish? I've heard mixed things about gravel (and I'm not sure I have the vertical room here anyway. Do I line the bottom with newspaper? I was going to fill the bottom half with normal potting soil, and then the top half with seed starting soil, and then plug it with arugula or some other vegetable.
Any recommendations on how to prepare the container, and how/what to fill it with would be greatly appreciated!