The top photo is the regular potatoes (yukon gold, I think). The bottom picture is of my sweet potatoes. That's black plastic covering the dirt, supposedly helps heat up the soil. I'm so proud of my sweet potatoes. I started the slips from potatoes I raised last year. As you can tell I wasn't able to grow enough slips to fill the bed, so I'm going to buy some extras from a local supplier, but all the ones you see in the photo are from one of last year's sweet potato. I tried to get slips from two sweet potatoes but only only gave me any.