Growing vegetables in containers is possible but there are some that grow easily and produce heavily in containers. Due to this we've added 20 Best and Most Productive Vegetables to grow in pots. From Balcony Garden Web
A small balcony has been converted into an oasis by adding lots of plants in wooden containers, ceramic pots, railing planters, etc. There is still enough place for the family to sit outside and spend time alone or with each other.
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Morning glory porch screen -- You can't eat morning glories but you can use this idea to grow green bean plants that run, such as pole beans or half runners. It will make it easier to pick them plus provide some shade and privacy on your porch.