Storing onions and potatoes together is not recommended as they have different storage requirements. While onions prefer a cool, dry, and well-ventilated environment, potatoes require a cool and dark place with high humidity. Storing them together can lead to spoilage and deterioration of both vegetables.

Onions should be stored in a cool, dry place with good air circulation. A temperature range of 45-55°F (7-13°C) is ideal for onion storage. High humidity can cause onions to rot, so it is important to keep them dry. Additionally, onions should be stored away from direct sunlight as it can cause them to sprout.

Potatoes, on the other hand, require a slightly different storage environment. They should be stored in a cool and dark place with a temperature range of 45-50°F (7-10°C). Potatoes also need high humidity to prevent them from drying out. Exposure to light can cause potatoes to turn green and develop a bitter taste, so it is important to keep them in a dark location.

When stored together, onions and potatoes can affect each other's storage conditions. Onions release moisture and ethylene gas, which can accelerate the sprouting and spoilage of potatoes. Conversely, potatoes release moisture and can cause onions to become soft and moldy.

To ensure the longevity of both onions and potatoes, it is best to store them separately. If you have limited storage space, you can use different containers or drawers to keep them apart. For example, you can store onions in a mesh bag or a hanging basket in a cool and dry location, while potatoes can be stored in a dark and humid cellar or a paper bag to maintain their freshness.

It is important to regularly check both onions and potatoes for any signs of spoilage or sprouting. Remove any damaged or rotten vegetables to prevent the spread of decay.

References:

1. "Onions: Storage and Selection" - University of California Agriculture and Natural Resources: https://ucanr.edu/sites/Postharvest_Technology_Center_/Commodity_Resources/Fact_Sheets/Datastores/Vegetables_English/?uid=19&ds=799
2. "Potatoes: Storage and Selection" - University of California Agriculture and Natural Resources: https://ucanr.edu/sites/Postharvest_Technology_Center_/Commodity_Resources/Fact_Sheets/Datastores/Vegetables_English/?uid=20&ds=799