I don't have room in my yard for a vegetable garden at this time this year. I have a very large deck that gets good sun. I was thinking of growing tomatoes, peppers, beans, And cucumbers in pots with trellises. What size pots would be best and how many plants could I fit in each pot. I'd like to have one pot for each kind of vegetable and 2-3 plants in each pot. Is this possible?