You don't need to buy from a nursery. Buy an organic sweet potato from the supermarket, submerge it halfway in a glass of water, in a few short weeks you break off the slips/sprouts and plant them. You'll have enough sweet potatoes to feed your family for months from just one sweet potato. Just make sure the one you buy is organic. You can grow them in large pots if your ground has too much clay. I've also grown them in straw bales and they've done well.Last year was our first year with potatoes and it was a successful crop in the garden. I would like more root crops and sweet potatoes ar high in the list, as well as celery root and carrots. I do grow radishes already, although they failed last year. I may try to incorporate sweet potato this year of there's room and if I can find them without having to pay expensive shipping fees. I may need to check local nurseries in March to see if they stock them.