I'd much rather have a big yard to putter in but when push comes to show, my little balcony here in Toronto gets the job down quite nicely. Here is the before and after.
I now have allof my herbs growing nicely; thyme, oregano, cilantro, mint, basil, rosemary and parsley. Three cherry tomato plants nestled in with marigolds, an assortment of lettuces which are my favorite because I snip them everyday for a little saladand my mothers day jade.
If you really focus on all the green you can almost pretend you don't see your neighbor throwing garbage off her balcony.