07/29/2026
Ever found little shoots growing from your potatoes? It’s not a mystery—it’s science! Potatoes are tubers, meaning they’re underground stems storing energy. When conditions are favorable, potatoes will naturally begin to sprout. This sprouting process is a part of their life cycle.
The “eyes” of potatoes can produce new shoots and roots. This growth process is driven by hormones and enzymes that stimulate the development of new plant structures.
Conditions that contribute to sprout development:
Temperature: Potatoes are sensitive to temperature. When stored in warmer conditions, typically above 45°F (7°C), they are more likely to sprout. Cooler temperatures, between 40°F (4°C) and 45°F (7°C), help inhibit sprouting, which is why it’s best to store potatoes in a cool, dark place.
Light Exposure: Light triggers the potato’s growth process. Even small amounts of light can signal the potato to start sprouting. This is why storing potatoes in a dark place is crucial to delay sprouting. Light not only encourages sprouting but can also lead to the production of solanine, a natural toxin that can make potatoes taste bitter and potentially cause health issues.
Storage Time: Over time, potatoes naturally begin to sprout as part of their aging process. If potatoes are kept for too long, they will start to use their stored nutrients to grow, leading to sprouts.
Humidity: High humidity can also promote sprouting. Potatoes stored in overly damp conditions are more prone to developing sprouts. Keeping storage areas well-ventilated and dry helps to prevent this issue.
While sprouted potatoes are generally safe to eat, the sprouts themselves can be toxic in large amounts due to solanine. It’s best to remove the sprouts and any green areas before cooking. If the potato is extensively sprouted or has a shriveled appearance, it might be best to discard it.
