I read an article that said the closer together the plants, the smaller the potatoes. I grow mine in felt pots, big 20 gallons ones and put maybe four seed potatoes in each. All I get is fingerlings from russets and small new potatoes from the Yukon Golds. Like you Neal, I want some big ones to store. Plus the return on the investment in the pots and stuff to fill them with (soil, leaves, straw, etc) is expensive for 30# of potatoes. I have the cooperative extensions pamphlet on growing potatoes here as well as one on growing them in pots. I will dig them out.
