Stone, I thought the same thing, but I remember my Ag teacher in High School telling us that if you plant too far out from the certified seed potatoes that they wouldn't do well. I always rotate crops in my garden, and I have a bunch of horses, so organic matter is not an issue. I always add steamed bone meal to root crops. I haven't replicated that experiment again, as I didn't want another crop failure. These were Red Poniac potatoes. I also know that the people who grow potatos for patato chips use a high bred potato. They are really nice big firm white potatos. People who have tried to grow them using the previous years potatoes say they get a very poor crop.
