@gjones you can let the eyes grow on a potato (we call them slips) cut off all the eyes on potatoes & either plant them or store in cool dry place for next planting season! I never buy seed for potatoes, I use "slips" from previous harvest.
@gjones @gardengirlla I didn't know that. Look what I found onlime: Overwintering Sweet Potato Vine Tubers cut the vines to ground level, then dig them up before the first frost in autumn. Dig carefully and be careful not to slice into the tubers. Brush the soil lightly off the tubers, then store them, not touching, in a cardboard box filled with peat moss, sand or vermiculite.
Place the box in a cool, dry location where the tubers won’t freeze. Watch for the tubers to sprout in spring, then cut each tuber into chunks, each with at least one sprout. The tubers are now ready to plant outdoors, but be sure all danger of frost has passed. From the Gardening Know How site
@gjones u can grow these in soil or just water! U can let a potato grow what we call eyes. Slice eyes we call them "slips" then but those in ground & it'll produce a vine or you can replant tubers. I use eyes to grow potato vines in jar over my sink or "slips, to plant in soil in a container to grow vine like in pic! I use "slips" to grow my potato patches.