Best Onion Varieties for Winter Storage: The Ultimate Guide

Welcome to our ultimate guide on onion varieties for winter storage. If you’re an avid gardener or just beginning to dabble in homegrown produce, you may already know that not all onions are created equally. Choosing the right onion varieties for winter storage is crucial to ensure you have a delicious and bountiful supply throughout the cold months. In this guide, we’ll walk you through everything you need to know about the best onion varieties for winter storage, including their characteristics and specific storage requirements. Let’s get started!

Understanding Winter Storage Onion Requirements

In order to successfully store onions over the winter, it’s important to understand their specific requirements. Proper storage conditions can help prevent spoilage, disease, and sprouting. Here are some key factors to consider:

Factor Ideal Conditions
Temperature 30-40°F (-1-4°C)
Humidity 65-70%
Curing 2-4 weeks in a dry, cool, and ventilated area

It’s important to note that onions should be harvested when the tops begin to dry and fall over. This signifies that the onions have reached maturity and are ready to be cured. Curing helps to remove excess moisture from the onions and prepares them for long-term storage.


The temperature of the storage location is crucial to prevent spoilage and sprouting. The ideal temperature range for onions is 30-40°F (-1-4°C). If the temperature is too high, onions may begin to sprout, soften, or rot. If the temperature is too low, onions may become frozen and suffer from texture and flavor changes.


Humidity levels also play a significant role in onion storage. The ideal humidity range for onions is 65-70%. If the air is too dry, onions may become excessively dry and difficult to peel. If the air is too humid, onions may become moldy or soft.


Proper curing is essential for storing onions over the winter. Curing helps to remove excess moisture from the onions and allows them to develop a protective dry layer around the skin. To cure onions, simply hang them in a dry, cool, and well-ventilated area for 2-4 weeks or until the tops and necks are completely dry. Once the onions are cured, remove any loose skins and cut off the tops and roots. Store the onions in a cool and dry location.

Best Onion Varieties for Winter Storage

Choosing the right onion varieties for winter storage is essential for ensuring that they remain fresh and flavorful throughout the season. Here are some of the top onion varieties known for their excellent storage capabilities:

Variety Description
Yellow onions One of the most popular onion varieties with a strong, pungent flavor. They are medium to large in size, with a papery skin and multiple layers of flesh.
Red onions A bit milder than yellow onions, but still have a distinct flavor and color. They are medium-sized with a shiny, red or purple skin and white flesh.
White onions Have a mild, sweet taste and a thinner skin than other varieties. They are small to medium in size with a white, papery skin and translucent flesh.
Shallots Small, elongated onions with a delicate, sweet flavor. They have a brown or red skin and are commonly used in French cuisine.

All of these onion varieties should be cured properly before storage to remove excess moisture and ensure maximum longevity. They should also be stored in a cool, dark, and well-ventilated area to prevent rotting and sprouting.

Tips for Preserving Onions for Winter

If you want to enjoy fresh onions throughout the winter, it’s important to take proper care of them during storage. Here are some tips to preserve your onions:

  1. Harvest onions at the right time: For best results, harvest onions when the tops start to yellow and fall over. Then allow them to dry out for a few days in a warm, dry area before storing.
  2. Cure onions properly: To prepare onions for storage, cure them in a well-ventilated area at temperatures between 70-75°F with low humidity. This process helps to toughen the outer layers of the onion and prepare them for long-term storage.
  3. Store onions in a cool, dry place: Onions should be kept at a temperature between 32-40°F with low humidity. A root cellar or cold garage is an ideal location for storing onions.

Proper handling and storage will help to extend the shelf life of your onions, ensuring that you have fresh onions all winter long.

How to Store Onions for the Winter

Proper storage is key to keeping onions fresh and flavorful throughout the winter months. Here are some step-by-step instructions to help you store your onions effectively:

  1. Harvest and Cure: Once your onions are ready to harvest, let them dry in a warm, dry place for several weeks. This process, known as curing, will help remove excess moisture and prepare them for storage.
  2. Clean and Prep: After your onions are cured, clean off any excess dirt and remove the stems. Be sure to handle them gently to avoid bruising or damaging the skin.
  3. Choose Your Storage Location: Find a cool, dry area in your home for onion storage. A root cellar, basement, or garage can work well. Make sure the area is well-ventilated and has a consistent temperature between 32-40°F.
  4. Use Appropriate Containers: Onions can be stored in mesh bags, baskets, or crates. Avoid using plastic bags, as they can trap moisture and cause the onions to spoil. Make sure the containers have plenty of room for air circulation.
  5. Monitor Your Onions: Check your onions regularly for signs of spoilage, such as mold or soft spots. Remove any onions that have started to go bad to prevent them from spoiling the rest of the batch.

By following these simple steps, you can enjoy delicious, fresh onions all winter long!

Extending the Shelf Life of Onions

Proper handling and storage techniques can help extend the shelf life of onions during winter storage. Here are a few tips to keep in mind:

  1. Handle with care: Onions can bruise easily, so handle them gently to avoid damage. Avoid dropping or tossing them onto hard surfaces.
  2. Remove damaged layers: If an onion has a damaged or moldy layer, remove it before storing. This can help prevent spoilage from spreading to other onions.
  3. Store in a cool, dry place: Onions should be stored in a cool, dry location with good ventilation. Avoid storing them in a damp or humid area, which can promote mold growth.
  4. Avoid direct sunlight: Onions should be kept out of direct sunlight, which can cause them to sprout or spoil more quickly.
  5. Check regularly: Check your onions regularly for signs of spoilage or sprouting. Remove any onions that are starting to go bad to prevent them from spoiling other onions.

By following these simple tips, you can help ensure that your winter storage onions stay fresh and delicious for as long as possible.

Cooking with Winter Storage Onions

Winter storage onions are a versatile ingredient that can be used in a variety of delicious recipes. These onions have a more concentrated flavor than fresh onions and can add depth and richness to your dishes. Here are some ideas for cooking with winter storage onions:

  • Caramelized onions: Slow-cooking onions over low heat brings out their natural sweetness and results in a deliciously golden, caramelized flavor. Serve caramelized onions as a topping for burgers or sandwiches, or use them as a base for French onion soup.
  • Roasted vegetables: Toss chopped winter storage onions with your favorite root vegetables (like carrots, potatoes, and beets) and roast them in the oven for a comforting winter side dish. Drizzle with olive oil and sprinkle with salt and pepper before roasting for maximum flavor.
  • Soups and stews: Winter storage onions are the perfect addition to hearty soups and stews. Try them in classics like beef stew or lentil soup, or experiment with new recipes that showcase their rich flavor.
  • Pasta sauces: Sauté diced winter storage onions with garlic and tomatoes for a delicious pasta sauce. Add a splash of white wine and a pinch of red pepper flakes for extra flavor.

Winter storage onions can also be used in savory tarts, quiches, and frittatas, or as a topping for pizzas. Get creative with your cooking and experiment with these flavorful onions in a variety of dishes.

Frequently Asked Questions about Onion Varieties for Winter Storage

Below are some common questions and concerns related to choosing the right onion varieties for winter storage:

What Makes an Onion Suitable for Winter Storage?

Onions that are suitable for winter storage have a thicker skin and a higher dry matter content. They also tend to be more pungent in flavor, which helps to deter pests and diseases.

Can I Store Onions from Any Variety for the Winter?

Not all onion varieties are suitable for winter storage. Look for varieties that are specifically labeled as good storage onions, such as ‘Copra’, ‘Red Wethersfield’, or ‘Stuttgarter’.

How Should I Harvest Onions for Winter Storage?

To prepare your onions for winter storage, wait until the foliage has died back and the bulbs have matured. Then, carefully dig up the onions and place them in a dry, airy location to cure for several weeks.

What Temperature and Humidity Levels Should I Aim for During Storage?

Ideally, onions should be stored between 32 and 40 degrees Fahrenheit, with a relative humidity of around 65%. Avoid storing onions in damp, humid locations, as this can encourage mold and rot.

How Long Can Onions Be Stored for During Winter?

With proper storage conditions, onions can typically last for several months during the winter. Some varieties may even last up to a year if stored under optimal conditions.

How Can I Tell If My Stored Onions Are Spoiled?

Check your stored onions regularly for any signs of softness, mold, or discoloration. Any onions that have started to rot or sprout should be discarded immediately to prevent spoiling the rest of the batch.


Choosing the right onion varieties for winter storage is crucial for ensuring a successful harvest and a supply of fresh onions throughout the winter months. By understanding the specific requirements for storing onions over winter and following the tips and techniques outlined in this guide, you can extend the shelf life of your onions and enjoy their delicious flavors in a variety of dishes.

Whether you prefer sweet onions or savory varieties, there are many options available for winter storage. From the classic Yellow Globe onion to the unique Red Wethersfield onion, each variety has its own distinct characteristics and uses.

Start Planning Your Winter Onion Storage Today

Now that you have a better understanding of the best onion varieties for winter storage, it’s time to start planning your harvest and storage techniques. Remember to keep your onions cool, dry, and well-ventilated for the best results.

By following the tips and techniques outlined in this guide, you can ensure that your onions stay fresh and tasty throughout the winter. So start planning your harvest today and enjoy the many culinary uses of winter storage onions!