I tried 3 sisters 2 summers ago, and failed miserably. The squash was stunted, the corn was stunted, and the pole beans turned everything into an impenetrable jungle. But I've heard that others have great results. I think that when the native Americans used this method, all of the crops were meant for fall harvest, so it was not necessary to get in to the patch before a fall harvest of mature squash, and corn and beans that would be dried for winter use. I'd love to hear folks success stories, particularly what cultivars were used, spacing, timing of planting, and any other details that made it successful.