Potatoes come from a potato plant; part of the potato plant is above the ground, but the potatoes themselves grow underground. The portion of the plant that is above ground has leaves and flower buds. When a plant has flowered, this is a sign that potatoes are growing underground.
Potatoes grow best in a cool climate. Growers in areas with a hot season can still grow potatoes if they plant them early.
Growers grow potatoes by planting a potato or part of a potato in the ground. A potato has buds or "eyes" all over it that eventually sprout into plants. Once the potato has been planted, the top part of the plant can be seen within a couple weeks.