"High-flyer" (18th floor) Garden

Today, I have planted the seeds of what will become my own home grown food (it doesn't get more organic than this)! Since I don't have any access to a yard to plant my garden in, I will use my balcony that gets enough of sun. Of course, it also means that I will be on a war with local (Mississauga) pigeons...

As it is my first "adventure" in gardening, I am starting small. What I have at the moment are onions, tomatoes, peppers, aubergines, rosemary, basil, dill and mélisse.

I know there are some holes in my gardening knowledge, so feel free to comment with advice.