Few things are more annoying than reaching for a potato and finding it covered in pale sprouts. Here's the old trick that actually has science behind it: store an apple with your potatoes. Apples release ethylene gas as they ripen, and steady exposure to ethylene suppresses sprouting in potatoes — it's the same principle commercial growers use in storage warehouses. One apple in the basket keeps your potatoes firm and sprout-free for weeks longer.
Why Do Potatoes Sprout?
Potatoes are living tubers, and sprouting is them trying to grow into new plants. Warmth, light, and moisture all signal "time to grow." Once sprouts appear, the potato diverts its starches into the sprout, going soft and wrinkly — and the sprouts themselves contain solanine, a bitter compound that's mildly toxic in large amounts. The apple trick doesn't change the storage conditions; it adds a chemical signal (ethylene) that tells the potato to stay dormant.
The Apple Method
- Choose a cool, dark, dry spot. A pantry cupboard, a cellar corner, or a dark cupboard shelf — ideally 7–10°C. The apple trick works best on top of good storage, not instead of it.
- Use a breathable container. A basket, a paper bag, or a mesh bag. Never a sealed plastic bag — trapped moisture rots potatoes fast.
- Add one apple per few kilos of potatoes. A single medium apple is enough for a typical household bag. Tuck it in among the potatoes.
- Keep them away from onions. Onions release moisture and gases that make potatoes sprout and spoil faster — store the two separately. (Those onion-cutting tears are the least of what onions do to your pantry.)
- Check weekly and replace the apple. Pull out any soft or sprouting potatoes before they affect the rest. Swap the apple when it starts to wrinkle — a spent apple releases little ethylene.
Are Sprouted Potatoes Safe to Eat?
- Small sprouts: yes, with a caveat. Snap off the sprouts and cut away any green skin generously — the flesh underneath is fine.
- Large sprouts or green patches: be cautious. Green skin means solanine has built up, and it isn't destroyed by cooking. Cut away all green parts thickly.
- Soft, shrivelled, heavily sprouted: compost them. The texture and taste are gone, and the solanine risk isn't worth it.
More Potato Storage Rules
- Darkness matters as much as temperature. Light triggers both greening and sprouting. A dark bag inside a dark cupboard is the gold standard.
- Don't wash before storing. Moisture on the skins invites rot. Brush off loose dirt and wash only right before cooking.
- Don't refrigerate unless you must. Cold converts potato starch to sugar, changing the taste and making them brown too fast when fried. A cool pantry beats the fridge for flavour.
FAQ
Does the apple make the potatoes taste like apple? No. Ethylene is odourless at these levels and doesn't transfer flavour. Your potatoes taste like potatoes.
Banana or apple — which is better? Bananas produce more ethylene, but they also ripen and rot quickly, which can spoil the potatoes around them. Apples last longer in the basket, making them the more practical choice.
How long will potatoes last with the apple? In a cool, dark spot with an apple, expect 3–5 weeks of firm, sprout-free potatoes — roughly double the life of potatoes stored warm on the counter.
Can I use this trick for sweet potatoes? Sweet potatoes sprout differently and the ethylene effect is less studied. The cool-dark-dry rules still apply, but the apple trick is specifically a regular-potato hack.
Good storage is the foundation of every kitchen hack — our guide to keeping vegetables fresh longer in the fridge covers the rest of the produce drawer, and the banana stem-wrap trick uses similar gas-control science for fruit.