If you’re wondering how to store onions and when to refrigerate them, you’re probably seeing a lot of different answers. Some people will tell you never to put whole onions in the fridge and that the pantry is the only place they belong. But I have been storing my whole onions in the bottom drawer of my refrigerator for years, especially when I buy them in bulk, and they stay fresh for a very long time.
I actually used to keep my onions in the pantry. The problem was, after a while, my pantry would start smelling like onions, and eventually I felt like my whole kitchen smelled like them. For me, I would rather keep my onions contained in the refrigerator than have that onion smell throughout my home.
How to Store Onions:
There is one little trick I’ve learned, though. I keep the onions in the original mesh bag and leave that dry, papery outer skin on. I don’t peel them or transfer them into a Ziploc bag. Whenever I’ve put whole onions in a sealed plastic bag, I’ve noticed they become moist and seem to rot much faster.
So, although storing whole onions in the refrigerator isn’t the usual recommendation you’ll hear, this is what has worked for me. In this article, I’ll show you how to store onions, including whole onions, cut onions, fresh garden onions, pantry storage, and long-term storage.
Why Are People Skeptical About Storing Onions in the Fridge?
You may have heard that you’re never supposed to refrigerate whole onions. There’s actually a reason behind that advice.
Whole, dry onions generally do best in a cool, dry, dark, and well-ventilated place. A refrigerator is cold, but it is also a humid environment. That extra moisture can cause whole onions to soften or deteriorate, particularly if they’re stored in a sealed plastic bag where moisture gets trapped.
This is also why you’ll commonly see recommendations to store onions in a pantry, cellar, basement, or another cool and well-ventilated area instead of the refrigerator.
But every kitchen and home is different. If your pantry gets warm, your onions sprout quickly, or—like me—you simply don’t want the smell of onions in your pantry, refrigeration may be an option worth trying.
The important part is airflow and moisture control.
How to Store Whole Onions in the Fridge
Here’s exactly how I store whole onions in my refrigerator.
1. Leave the papery skin on.
Don’t peel your onions before storing them. That dry outer layer helps protect the onion underneath.
2. Keep them dry.
I don’t wash whole onions before storing them. Moisture is something we’re trying to avoid.
3. Leave them in their original mesh bag.
This is important to me. I buy onions in bulk and simply leave them in the mesh bag they came in. The holes allow air to circulate around the onions.
4. Don’t put them in a sealed Ziploc bag.
I’ve tried this before, and I noticed that moisture accumulated inside the bag and the onions started deteriorating faster. If you’re refrigerating whole onions, you don’t want them sitting in trapped moisture.
5. Place them in the bottom drawer of the refrigerator.
I put the entire mesh bag in the bottom drawer and take out onions whenever I need them.
Using this method, I’ve been able to keep my onions for months. Of course, storage time will vary depending on how fresh the onions were when you bought them and the conditions inside your refrigerator, so always check them before using them.
How to Store Onions in the Pantry
If you don’t want to refrigerate whole onions, the pantry is the traditional way to store them.
Choose a cool, dark, dry area with good airflow. Keep the onions in a mesh bag, wire basket, open container, or another breathable storage option.
Don’t put whole onions into a tightly sealed plastic container or plastic bag. Onions need ventilation, and trapped moisture can encourage spoilage.
You also want to keep them away from heat and direct sunlight. A pantry cabinet right beside your oven, for example, may get warmer than you realize.
Check your onions occasionally and remove any that have become soft, moldy, or rotten so they don’t affect the others.
How to Keep Onions Fresh After Cutting
Now, this is where the advice changes.
Once you’ve cut an onion, it belongs in the refrigerator.
Unlike a whole onion with its protective outer skin intact, a cut onion has exposed flesh. It needs to be covered and refrigerated to maintain its quality and reduce contamination.
Here’s how to keep onions fresh after cutting:
1. Don’t leave the cut onion sitting on the counter.
Put it away promptly after you’re finished preparing your meal.
2. Wrap or cover the exposed onion.
Place the remaining onion in an airtight food-storage container or resealable food-storage bag.
3. Keep it refrigerated.
Store the covered onion in your refrigerator rather than putting it back into the pantry.
4. Use it within about 7–10 days.
Cut onions don’t have the same long storage life as whole onions, so plan to use them relatively quickly.
If you notice mold, excessive softness, sliminess, or an unpleasant odor that seems different from the normal strong smell of an onion, throw it away.
Is It Bad to Store Cut Onions in the Fridge?
No. In fact, cut onions should be stored in the refrigerator.
I think some of the confusion comes from people hearing that you shouldn’t refrigerate whole onions and assuming the same rule applies after an onion has been cut.
It doesn’t.
Once an onion is peeled or cut, refrigeration is the safer way to store it. Keep it covered in a clean, airtight container or food-storage bag and use it within a reasonable amount of time.
And don’t worry about the old stories claiming that a cut onion somehow becomes poisonous overnight or absorbs all the bacteria around it. A properly handled cut onion can be safely refrigerated and used later.
How to Store Fresh Garden Onions
Freshly harvested garden onions require a slightly different approach, especially if you want to store them long-term.
If you’re growing mature bulb onions for storage, they normally need to be cured first.
After harvesting, allow the onions to dry in a well-ventilated, protected area. The outer skins should become dry and papery, and the necks should dry down before you prepare the onions for long-term storage.
Once they’re properly cured, remove loose dirt and trim them if necessary. Don’t wash the onions before long-term storage because introducing additional moisture can encourage spoilage.
Store your cured garden onions somewhere cool, dark, dry, and well-ventilated. Mesh bags, crates, baskets, or other breathable containers work well.
If you’re talking about fresh green onions or immature onions harvested with their green tops still attached, that’s different. Those should be refrigerated because they contain considerably more moisture than cured storage onions.
How to Store Onions Long-Term
If you buy onions in bulk like I do, figuring out how to store onions long-term can save you from throwing away half a bag.
For traditional long-term storage, cured onions need four main things:
Cool temperatures, darkness, dryness, and airflow.
A cool pantry, cellar, or similar storage area can work well if the conditions are right. Keep onions in something breathable rather than a sealed plastic bag and check them periodically for sprouting or spoilage.
My personal long-term method is different. I keep my bulk onions, with their skins intact, in their original mesh bag in the bottom drawer of my refrigerator. It works better for my home and prevents that strong onion smell from taking over my pantry.
Whichever method you choose, don’t store an onion that is already damaged or beginning to rot with the rest of your good onions. Remove it before the problem gets worse.
Can Onions and Potatoes Be Stored Together?
This is another question I see people asking all the time, and it’s better to store onions and potatoes separately.
It may seem convenient to throw both into the same pantry basket because they require similar cool, dark storage conditions. However, potatoes release moisture and gases during storage, and keeping onions and potatoes packed closely together can encourage faster deterioration and sprouting.
You don’t necessarily have to store them on opposite sides of your house. Just give them their own storage spaces with good ventilation rather than putting potatoes and onions together in the same bag or container.
Should You Refrigerate Whole Onions?
This really depends on the onions and your storage situation.
The traditional recommendation for whole dry onions is a cool, dark, dry, well-ventilated place outside the refrigerator. That method works beautifully when you have the right conditions.
But I’m also a big believer in paying attention to what actually works in your own kitchen.
I buy onions in bulk. When I kept them in my pantry, eventually my pantry smelled like onions. Since I started storing the whole onions in their original mesh bag in the bottom drawer of my refrigerator, I’ve had much better results.
I don’t peel them. I don’t wash them. I don’t put them in a Ziploc bag. I leave the dry outer skin intact, keep them in their breathable mesh bag, and refrigerate them.
That’s what works for me.
Final Thoughts on How to Store Onions
Learning how to store onions and when to refrigerate them doesn’t have to be complicated.
For whole dry onions, a cool, dark, dry pantry with plenty of airflow is the traditional choice. If you’re like me and prefer refrigerating your bulk onions, keep them dry, leave their protective skins on, and use a breathable mesh bag instead of sealing them inside plastic.
Once you’ve cut or peeled an onion, that’s when refrigeration becomes important. Cover it properly, keep it cold, and use it within about 7–10 days.
And remember to keep your onions and potatoes separate. A few small changes in how you store your onions can help them stay fresh longer, reduce food waste, and—in my case—keep your whole pantry from smelling like onions!
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