Potatoes can also be grown in a sack. There are a lot of examples on Internet, YouTube. Basically roll down sack to about 12", fill burlap sack with a bit of dirt and seed potatoes. Then add dirt and compost as the plant grows, unrolling sides of sack to add height.
My first time doing this I didn't get a huge crop but I didn't use any compost just dirt. I'm going to try this year adding lots of shredded leaf compost with a bit of composted chicken manure.
