Yams/sweet potatoes keep about 2–3 weeks in the pantry.
That's the longest window published for Yams/sweet potatoes — sealed in the pantry is its best case.
| Situation | Keeps for |
|---|---|
| Unopened · pantry | 2–3 weeks |
Air and warmth are what shorten an opened item's life — the right container buys back the days the packaging gives up once the seal's broken.
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About 2–3 weeks, according to USDA FoodKeeper v128, stored as follows: cool, dry pantry away from heat and light.
Yams/sweet potatoes are shelf-stable at room temperature: cool, dry pantry away from heat and light. Refrigerating it mainly preserves quality rather than safety.
Look for: Sliminess or a wet film; Mould or dark mushy spots; Limp, shrivelled, or yellowing leaves; An off or sour smell. Those are the general signs for vegetables — USDA FoodKeeper v128 publishes no spoilage note for Yams/sweet potatoes specifically. Never taste something to test it — when in doubt, throw it out.