Onions can only be stored for about three months at room temperature. However, storing them in a cold storage facility can significantly extend their shelf life. Many people look for advice on how to keep onions fresh so they can maximise their use of this pantry staple. In addition, cold storage not only increases the storage time of onions but also effectively preserves their quality. If you are wondering how to keep onions fresh for longer periods, onion cold storage is currently one of the important methods for preserving onions.
How to keep onions fresh: Onion Cold Storage Precautions
1. Onion cold storage extends the shelf life of onions through low-temperature storage. The optimal storage temperature for onions is -2°C. If you are concerned about keeping onions fresh, remember: do not place onions that are warm from prior storage directly into cold storage. Instead, first cool them at a lower temperature for a period of time. Furthermore, the ideal quantity for each storage entry is 10% of the cold storage capacity.
2. Before placing onions in cold storage, wrap them in plastic wrap to ensure storage quality. If you're searching for how to keep onions fresh, pay attention to ventilation to prevent spoilage due to lack of airflow. Promptly remove any rotten onions to prevent them from affecting other healthy ones.
3. Watering should be stopped about ten days before harvesting the onions to improve their storage life. Before storing onions, thoroughly disinfect the cold storage to ensure their safety. Therefore, using proper methods for how to keep onions fresh will help preserve their quality.
What types of onion cold storage facilities are available? There are generally two types of cold storage facilities for preserving onions: low-temperature cold storage and controlled atmosphere storage. Controlled atmosphere storage adds a controlled atmosphere system to the former. Therefore, the initial cost is higher, but it offers advantages in overall operation in the medium and long term.
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