Hi everyone! I'm just getting started so excuse the stupid questions. I would LOVE some advice! Do you think a plastic kiddie swimming pool filled with topsoil would work ? (About 4 ft diameter) I'm in zone 8 (Las Vegas)...The pool seems very, very durable. Should I put rocks or sand in the bottom before I fill it with top soil? Do you think I should line it with black plastic first? Do I need holes in it for drainage and should the holes be near the middle or around the edges, if at all? Should I put bricks or concrete blocks under it to allow air to circulate underneath? I live in a small upstairs apartment facing North. I have a 10 x 10 balcony with a little bit of an overhand which provides some shade in the hot, hot evening. Is there anything that can be planted in Zone 8 this time of year? (August) Thanks so much for any and all suggestions!