How do you keep potatoes fresh longer?

Online Answer
Potatoes need airflow to prevent the accumulation of moisture, which can lead to spoilage. The best way to allow free circulation of air is to store them in an open bowl or paper bag. Do not store them in a sealed container without ventilation, such as a zipped plastic bag or lidded glassware.
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Kept in the dark: Davison says your potatoes should be stored inside a paper bag in a cool, dark, dry place. And as mentioned above, away from onions and their sprout-encouraging gases.
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