Potatoes Kennebec Retail Seed Potatoes are large, smooth, white-skinned potatoes with shallow eyes, making them easy to wash and peel. They are resistant to mosaic, late blight, and net necrosis, and produce high yields of creamy, white-fleshed tubers—perfect for French fries. Plant 15-20cm apart for best results. Kennebec potatoes have excellent storage qualities but should be kept in the dark to prevent green skin. A medium-late variety with reliable performance and great storage potential.