As the potato plant grows, its compound leaves manufacture starch that is transferred to the ends of its underground stems (or stolons). The stems thicken to form a few or as many as 20 tubers close to the soil surface. The number of tubers that actually reach maturity depends on available moisture and soil nutrients.
How potatoes grow step by step?
Plant seed potato segments cut-side down (eyes up) in a 6-inch-deep hole or trench. Space each segment 12-inches apart on all sides. Between each segment, sprinkle 2 tablespoons of a low-nitrogen, high-phosphorous fertilizer. Then cover both potatoes and fertilizer with 2-inches of soil, and water the soil well.
How long do potatoes take to grow?
Full-sized potatoes are usually ready about 120 days from planting. Experienced gardeners sometimes judge the progress of the crop by watching for a distinctive bulging of the soil around the stem of the plant. As the potato tubers grow, the soil is displaced and a soil mound forms.
How do potato roots grow?
The potato plant itself grows vertically from the seed potato, or seed piece if you've started with a large potato. The plant's actual functioning roots will grow downward and outward from the seed potato, potentially reaching a depth of as much as 18 inches, according to North Dakota State's extension service.
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