I originally intended to grow the potatoes in round containers making better use of space but the cost of the containers made me re-think that. So we are using the hole method.
We dug holes about 8 inches deep and added the sprouting potatoes. We then covered them in dirt but not filling in the hole completely.
As they send up plants we will add dirt around the plants and then more dirt the taller they get. Bring on the potatoes!