If you properly store your onions, their shelf life is quite impressive. Medically reviewed by Jerlyn Jones, MS, MPA, RDN, LD, CLT Whole onions can last 1–3 months in a well-ventilated, cool, and dry ...

We don't recommend storing potatoes and onions together, as onions emit a gas that accelerates potato spoilage. To prolong freshness, store them separately in cool, dry, and well-ventilated areas.

Grace Cooper is a writer who specializes in shopping. Her work has appeared in The Kitchn, Apartment Therapy, Culinary Hill, and more. “When storing onions, think cool, dry, and breathable,” said ...