This spring we planted two planters on the driveway with pansies, thyme, and potatoes.
Soon, the potatoes were thriving and overcrowding the pansies (which were wilting under the hot sun anyway). As the weather was getting hot, and the flower pots were drying out quickly, we decided to harvest the potatoes and use the pots for something else.
From both pots we harvested approximately two pounds of new potatoes. Not bad container gardening :)