When it comes to long-lasting onions that can be stored for the winter and even into the spring, there are a few varieties that stand out. One such variety is the ‘Stuttgarter’ onion. I have personally grown this variety in my own garden and have found it to be a reliable option for storage. These onions can be harvested in the fall and then stored in a cool, dry place such as a root cellar. They are known for their excellent keeping qualities and can last for several months if properly stored.
Another variety that is renowned for its long storage life is the ‘Yellow Globe’ onion. This onion has a slightly more rounded shape compared to the ‘Stuttgarter’ but offers similar storage capabilities. Like the ‘Stuttgarter’, the ‘Yellow Globe’ can be harvested in the fall and then hung in mesh bags or braided together and hung in a cool, dry place. This variety is also a favorite among home gardeners for its ability to store well and provide a steady supply of onions throughout the winter months.
If you’re looking for a newer variety that is specifically bred for its long storage life, ‘Copra’ is an excellent choice. This yellow onion variety has been developed to be a reliable keeper under good storage conditions. I have heard great things about ‘Copra’ from fellow gardeners and have seen it recommended in various gardening publications. While I haven’t personally grown this variety, it is highly regarded for its ability to store for an extended period of time.
When it comes to storing onions, there are a few key factors to consider. First and foremost, onions should be harvested when the tops have completely dried and fallen over. This indicates that the onion bulbs have reached maturity and are ready for storage. It is important to handle the onions with care during harvest to avoid any bruising or damage that could lead to spoilage during storage.
Once harvested, the onions should be carefully cured before being stored. Curing involves allowing the onions to dry in a well-ventilated area for a period of two to three weeks. This helps to toughen the outer skin of the onions, which in turn improves their storage potential. After curing, any excess dirt or loose outer layers can be gently brushed off, but it is important not to remove too many layers as this can increase the risk of spoilage.
For long-term storage, it is best to keep onions in a cool, dry, and well-ventilated area. A root cellar is an ideal storage location as it provides the right conditions for onions to stay fresh for an extended period of time. The temperature should be around 32-40 degrees Fahrenheit (0-4 degrees Celsius) with a humidity level of around 65-70%. If a root cellar is not available, an alternative storage location could be a cool basement or garage.
To maximize storage life, it is important to regularly check the onions for any signs of spoilage or rot. Any onions that show signs of softening, mold, or sprouting should be removed and used promptly. It is also a good idea to store onions separately from other fruits and vegetables, as some produce can release gases that promote onion spoilage.
If you are looking for onions that store well for an extended period of time, ‘Stuttgarter’, ‘Yellow Globe’, and ‘Copra’ are all excellent options. These varieties have proven to be reliable keepers when stored properly in a cool, dry environment. By following proper harvesting, curing, and storage techniques, you can enjoy a supply of fresh onions throughout the winter and into the following spring.
