These regular size nuclear seed potatoes have only been grown in native soil once. These seed potatoes still hold the amazing vigor of the pre-nuclear seed potatoes but at half the cost. They have gone through the same testing and visual inspections the pre-nuclears have gone through to meet certification standards. The nuclear seed potatoes are being sold in VERY LIMITED QUANTITIES. First come, first served. We are only releasing a small amount of our overproduction for sale.