I too have grown potatoes in a raised bed. Sure is easier that trying to in clay. I’ve grown sweet potatoes in a pile of grass clippings and leaves that had about eight months to settle. The picture below is the third year of this particular bed. Wood chips, grass, leaves and pine needles. This is where every eye that sprouts goes regardless of the time of year. I did a lot of reading before doing this. There was an overwhelming amount of info saying don’t plant potatoes that sprout from the store. Virus’s, rot, doom and gloom if you do. I just thought I’d try it and it keeps giving me a small crop a few times a year. Even got a couple sweet potatoes slips in here that are growing right along with the red, and Yukon gold.