Signs that a potato may have spoiled include noticeably soft or wrinkled skin, green patches, long sprouts, mold, and a sour smell. A fresh potato is firm, with taut, dry skin. If these qualities change, spoilage may be starting. Potatoes can last a long time in a cool, dark, well-ventilated place, but light, moisture, and heat can speed up changes. Light-exposed potatoes may develop green areas and solanine, a natural compound. These areas can taste bitter and may cause discomfort if eaten in large amounts. Potatoes kept in damp conditions can sprout and soften more quickly. Some changes affect only appearance, while others damage the potato’s texture and taste and make it unsuitable to eat. Checking potatoes one at a time before use is a practical way to reduce waste and avoid eating questionable potatoes.
What Should You Check to Tell If a Potato Has Gone Bad?
Before eating or cooking potatoes, check them for signs that make it easier to distinguish spoiled tubers from sound ones. Spongy spots that give way when pressed are among the first signs of spoilage. A green area on the skin or around the eyes indicates light exposure; cut away and discard that area. Long sprouts extending more than a few centimeters can indicate that the potato has lost freshness and become hollow inside. Do not eat potatoes with white or gray mold spots or watery, soft rotten areas. If the earthy smell has changed to a sour, musty, or sharp odor, discard the potato.
What Mistakes Should You Avoid When Assessing Potatoes?
Some mistaken assumptions can lead to unnecessary waste or unsafe eating. Scraping only the surface of a green area and using the rest of the potato without cutting deeply is not safe. Checking only the outside and not feeling for soft spots may leave internal rot unnoticed. Removing the sprouts from a softened, shriveled potato does not make it sound. On the other hand, discarding a firm potato with only short sprouts may create unnecessary waste.
How Should You Store Potatoes to Delay Spoilage?
Store potatoes in a cool, dark, well-ventilated place to help them last. At home, potatoes generally stay fresh for a few weeks in a dark pantry, though the time varies with the variety and storage conditions. Refrigeration is generally not recommended because it can turn starch into sugar and change the taste. Storing potatoes with onions may also cause both to sprout sooner.
To assess whether a potato has spoiled, consider softness, green areas, excessive sprouting, mold, and unpleasant odors together. If the appearance or smell seems suspicious, the safest choice is not to eat it. Proper storage can delay these changes and help keep potatoes usable longer. Checking stored potatoes regularly can prevent spoilage in one tuber from spreading to others and help keep the pantry fresh.