I'm trying to grow vegetables on our balcony (we live in a tiny flat, third floor). Today my dad and me went out and bought all the supplies: a big black plastic container (dimensions in cm. are l70/w50/h40, approximately), a brown bag (60/60/40) meant to grow vegetables in which is further divided into four suares, earth to fill the containers, extra plant food, a watering can, very sturdy wire fencing, and seeds.
We went up to the balcony, placed and filled the containers. Then we started on a big protective 'cap' thing made of the wire fencing, over the black container. I finished it after my dad left. I planted pumpkin seeds in the black container before closing off the protective cap completely. It has the dual function of serving as a climbing frame for the pumpkin plant later on because there is very little room on the balcony, and to protect the seeds and young fruit from birds, especially seagulls which are a plague in our town. They can rip open almost anything, so we had to buy something we can trust they can't get through somehow. Then I planted carrot seed, fennel seed, celery seed and kohlrabi seed in the bag-container and protected those with the remains of the wire fencing. It didn't have to be as big a cap because there's no need for a climbing frame there.
The pumpkins won't all grow (or can't, rather) into full plants, because there's really only room for one of them in that container. I planted a lot of them anyway, to see which ones do best and because I don't think they'll all even come up. I'll have to (re)move the rest of them when they get bigger.
Below are two pictures of my new 'vegetable patch' taken from different angles.