Dig a trench about 10cm down and place the potato tubas in the trench 20 cm apart.
Cover the potato tuba with rich fertile soil with a pH of around 6.5 or lower
Water your potatoes 1-2 inches (2.5-5cm) of water per week
When the ground starts to crack around the flower and when the flower starts to turn yellow it means they are ready to be harvested. Dig up under the ground under the potato crop with a pronged fork.
The end product