A.W.
Depends on how big the pots are. I've used plastic 5gal buckets to grow tomato plants in before and it worked great! Smaller pots can be used for herbs, lettuce, radish, green onions. A long rectangle type planter could be used to grow some green beans and then have something for them to clmb up on one side (sit by fence etc). Larger type pots could also grow some summer squash or pepper plants. Med pot should work for eggplant............I would definetly do some nice lettuce mixes though. Get 6 small/med size pots and plant one each week with a nice lettuce mix, then you can pick them in weekly rotations! and radishes are super easy too.