Some nice spuds Joanne! Do you market them, or just feed a large family. I had 125 hills about 8 years ago, I fed half the county! Now I just plant one row, half reds, and half Yukon golds. I have only me to feed, so I give the rest to friends and family. I know you get more if you hill them, I just hill them once, and that's it, I used to keep piling the dirt on, and they keep growing taller and taller. Ever raise them in piled up tires? Just add a tire, and some dirt, and the potato will keep growing taller and taller. I've never done it, but for those who have space problems it might work.