This is a great way to get lots of potatoes in a small area—grow up!!
The usual technique of “hilling” potatoes is employed, but if you use containers that stack, you can keep hilling for a long time. Some gardeners have reported 50 lbs from a 4 square-foot container. The ones shown here are simple 4-sided boxes made from scraps of rough sawn pine. Another possibility (not as pretty) is old tires.