Sprouted potatoes do not automatically “go bad,” but they can become unsafe if they are very sprouted, green, soft, or bitter. Mildly sprouted, still-firm, not-green potatoes are usually safe if you cut off the sprouts and any green areas before cooking.

When sprouted potatoes are still OK

In early sprouting, the potato is just aging, not necessarily poisonous yet. You can often still use it if:

  • The potato feels firm , not mushy, wrinkled, or shriveled.
  • There’s little or no green on the skin; any small green patches can be peeled away.
  • Sprouts are short and few; you cut them and their “eyes” out generously before cooking.

Cooking methods like boiling, baking, or frying do not fully destroy the natural toxins, so trimming and discarding bad parts is important.

When sprouted potatoes should be thrown out

As potatoes age and sprout more, they build up glycoalkaloid toxins (mainly solanine and chaconine), which can cause nausea, vomiting, stomach pain, and diarrhea if eaten in higher amounts. It is safer to discard the potato if:

  • It is soft, wrinkled, shriveled, or has a strong bitter or “off” smell.
  • It is very green over much of the surface or green even under the peel.
  • It has long, extensive sprouts and looks exhausted or hollow inside.

Public health poison centers generally advise tossing potatoes that are green or heavily sprouted rather than risking glycoalkaloid toxicity.

How to handle and store potatoes to avoid this

Good storage slows sprouting and toxin build-up so potatoes stay safe longer.

  • Store potatoes in a cool , dark, dry place, ideally around 7–10°C (45–50°F), like a pantry or cellar.
  • Keep them away from light, which encourages greening and sprouting.
  • Do not store potatoes next to onions or certain fruits, because gases they release speed up sprouting and spoilage.
  • Check your stored potatoes regularly and use the oldest, non-sprouted ones first to reduce waste and risk.

If you ever eat a green or heavily sprouted potato and then develop significant nausea, vomiting, or stomach cramps, toxicology experts recommend seeking medical advice promptly.

Bottom line: A potato with tiny sprouts that is still firm and not green usually has not “gone bad” yet if you cut away sprouts and any green parts. If it is soft, very sprouted, or green, it is safer to throw it out than to try to salvage it.