How long sweet potatoes last in normal room temperature depends on many factors, and it's best to keep them in a pantry to last 3–5 weeks. You can also store sweet potatoes in the fridge for 2–3 months, or freeze them to last even longer.
How long do uncooked sweet potatoes last?
Stored on the counter, raw sweet potatoes will generally last for one to two weeks. If you have access to a cool, dark, dry area (similar to the root cellars of our ancestors), sweet potatoes can last about a month.
Why do sweet potatoes last so long?
Because they are very temperature sensitive, many sweet potatoes in the store have likely been kept cooler than is optimal. For long-term storage, you need to purchase sweet potatoes that have been properly cured.
How do you know if sweet potatoes have gone bad?
If the sweet potatoes start turning soft or mushy, they have gone bad. The same thing is true for sweet potatoes that turned a deep shade of brown to black. Check for weird growths through the skin or the presence of mold. If the sweet potatoes have developed an off-odor, toss the tubers in the trash.
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