Jeff,I was reading something this weekend about a guy who grafted his tomatoes and potatoes together. He says he figured it was a "dual-purpose" plant and allowed him to utilize space in his garden more efficiently. But my thought was, wouldn't that cut down on the amount of energy the plant was able to devote to each product and leave you with either smaller potatoes and tomatoes or fewer of them? Or does it not work like that because they are only sharing a root system and not really the foliage? If the latter is true, then I suppose if the soil was rich enough to support the plants it wouldn't matter. But I have a feeling this is better in theory than in practice.