Grow an endless supply of sweet potatoes at home from 1 store bought potato. Place 1 sweet potato in the center of a container and cover with soil. Once sprouts reach about 6-inches tall remove 6 of them from the original container and plant in a 20 gallon container with drainage holes. Water regularly and after about 4 months turn the container over and dump out the rooted soil to harvest the new sweet potatoes. A 20 container should produce about 3 to 4 gallons of sweet potatoes.