You bought a big bag of potatoes last week. You tossed them in the pantry next to the onions, the bananas, maybe a couple of avocados. Seemed fine. Now it’s Tuesday and your potatoes look like they’re trying to grow legs and walk out of the kitchen. Sound familiar?
Here’s the thing — potatoes are one of the longest-lasting items you can buy. Stored the right way, they can stay firm and usable for months. But most of us are sabotaging them without even realizing it, and the biggest problem isn’t the potatoes themselves. It’s what we’re putting next to them.
Let’s talk about every food you need to keep far, far away from your spuds — and exactly what happens when you don’t.
Onions Are the Number One Offender
This is the classic pairing everyone gets wrong. Onions and potatoes both want to be stored in cool, dark places, so people throw them in the same bin or basket and call it a day. It makes logical sense. It’s also completely wrong.
Onions release ethylene gas, which is a natural compound that speeds up ripening in nearby produce. When your potatoes get hit with that ethylene, they start sprouting and developing eyes way ahead of schedule. At the same time, potatoes give off moisture — and onions absolutely hate moisture. It makes them soft, mushy, and prone to mold.
So you’ve got a situation where both foods are actively destroying each other. The onions make the potatoes sprout. The potatoes make the onions rot. It’s a mutual destruction pact happening right there in your pantry. A proper separation between the two can add weeks to the storage life of both, which means less wasted food and less wasted money. Even if they’re in the same cupboard, put them in separate containers with some distance between them.
Bananas Are Ethylene Bombs
If onions are the number one offender, bananas are a close second — and honestly, they might be worse in terms of raw ethylene output. Bananas pump out more ethylene gas than almost any other fruit in your kitchen. That’s why a green banana can turn yellow and spotted in what feels like a single afternoon.
Now imagine those bananas sitting on the counter directly above where you keep your potatoes. All that gas drifts down, surrounds your spuds, and triggers sprouting fast. And once a banana starts to go — you know, when the peel starts leaking and getting slimy — it accelerates the spoilage of everything around it. Keep bananas on a separate counter or hang them on a banana hook well away from wherever your potatoes live.
Apples Look Innocent but Aren’t
Apples are sneaky. They just sit there looking wholesome and harmless, but they’re quietly pumping out ethylene gas the entire time. They’re one of the stealthiest ripening agents in your kitchen, and they will cause your potatoes to sprout prematurely and develop an off taste if stored nearby.
The fix is easy — store apples in the fridge or in a separate fruit drawer. They do great in cold storage. Potatoes do not. So there’s really no reason these two should ever be in the same spot. If you buy apples in bulk from Costco or Sam’s Club, make sure they go straight into the refrigerator and nowhere near the pantry where your potatoes are hanging out.
Avocados Speed Everything Up
Avocados are another heavy ethylene producer, and they get worse as they ripen. A rock-hard avocado from the store isn’t putting out much gas yet, but the second it starts softening, it’s releasing ethylene that seeps out and affects nearby produce — including your potatoes.
The best move is to ripen avocados on a kitchen counter that’s away from your potato storage. Once they’re ripe, move them to the fridge to slow things down. This keeps them from turning into brown mush and keeps their ethylene output away from anything that might be affected by it. Simple enough, but most people just toss avocados wherever there’s counter space.
Garlic Is a Surprising Problem
Garlic and potatoes go together beautifully in a recipe. In storage? Not so much. Garlic releases gases as it ages that can trigger sprouting in potatoes — those little eyes start showing up much faster when garlic is nearby. And the problem goes both ways, because garlic needs a dry environment and potatoes emit moisture that can cause garlic to mold or sprout early.
There’s also a flavor issue. Potatoes and sweet potatoes can absorb garlic’s strong aroma during storage, which alters their taste in ways you probably don’t want — especially if you’re making something where you need a clean potato flavor. Keep garlic in a mesh bag or small bowl in a cool, dry spot that’s separate from your spuds.
Tomatoes and Peaches Are Quiet Troublemakers
Tomatoes don’t produce as much ethylene as bananas or apples, but it’s enough to start triggering potato sprouts before you’re ready to cook. And if you’re storing tomatoes in a closed space — like a pantry shelf or a cabinet — the ethylene builds up with nowhere to go. Add in the moisture that potatoes naturally give off, and you’ve got a rot situation on your hands pretty quickly.
Peaches, pears, and cantaloupe are in the same boat. All of them are ethylene producers that will make potatoes sprout faster. If you buy peaches at the farmers market or grab a cantaloupe from Walmart, keep them on a different counter or in the fridge — just away from wherever the potatoes are.
Melons Are Worse Than You Think
Cantaloupes, honeydew, and even watermelons all produce ethylene gas, and they ramp up production as they ripen. A lot of people buy melons and just set them on the counter or the floor near the pantry while they wait for them to ripen up. If your potatoes are anywhere nearby, they’re getting a steady stream of ethylene that’s speeding up the aging process.
The result is sprouted potatoes that eventually turn soft and unusable. Melons are big enough that they tend to take up whatever open space is available, which often puts them dangerously close to pantry staples like potatoes. Give them their own spot — a different counter, a different part of the kitchen, anywhere that’s not within arm’s reach of the spuds.
Sweet Potatoes Have the Same Enemies
Everything that applies to regular potatoes applies to sweet potatoes too. They’re highly sensitive to ethylene gas, which means onions and garlic are just as bad for them. Sweet potatoes will sprout faster and develop eyes and roots when stored near ethylene producers. They’ll also absorb strong aromas from garlic and onions, which changes their flavor profile in ways you probably won’t enjoy.
Stored properly — in a paper bag or basket in a cool, dark spot — sweet potatoes can stay good for up to a month. But if even one has a bruise or soft spot, cook with it right away, because that damage tends to spread to the others if they’re all sitting together.
How to Actually Store Potatoes the Right Way
Now that you know what to keep away, here’s how to give your potatoes their best shot at a long life. The ideal temperature range is between 45 and 55 degrees Fahrenheit — roughly what a basement or root cellar would feel like. Most pantries are warmer than this, which is why potatoes at room temperature only last a couple of weeks instead of months.
Never put them in the refrigerator. The cold turns the starch into sugar, which messes with both the flavor and how they cook. You’ll end up with weirdly sweet, grainy potatoes that don’t behave right in recipes.
Ditch the plastic bags immediately. Plastic traps moisture, and moisture is the fast track to mold. Use a paper bag, a burlap sack, or just an open basket. The goal is airflow. Potatoes need to breathe.
Don’t wash them before storing. I know it feels wrong to put dirty potatoes in the pantry, but that layer of dirt actually provides a little extra protection from light. You can wipe them with a dry cloth if it makes you feel better, but save the real washing for when you’re about to cook them.
Keep them in the dark. Sunlight causes greening — that’s when the skin turns green and the potato starts producing compounds you don’t want to eat. If your pantry gets any light, the paper bag trick works great for blocking it out.
And check on them regularly. One bad potato in the bunch can take out the whole bag. Sort through them every week or so and pull out anything that’s getting soft, bruised, or sprouting. Use those up first or toss them. The ones that are still firm will last much longer without a rotten neighbor dragging them down.
The Quick Cheat Sheet
Keep away from potatoes: onions, garlic, bananas, apples, avocados, tomatoes, peaches, pears, cantaloupe, honeydew, and watermelon. Store potatoes in: a paper bag, basket, or burlap sack in a cool, dark, ventilated spot. Never: refrigerate, use plastic bags, wash before storing, or ignore sprouting potatoes in the batch.
Do all of this and your potatoes will last weeks longer than they used to. Skip it, and you’ll keep wondering why you’re throwing away half the bag before you ever get around to cooking them.
