How long can fresh onions be preserved without spoilage?

Onions can be stored in a cool, dry and dark place for about 30 days and at room temperature for one week.

2. Common storage methods of onions: choose a dry and ventilated shady place, pave with sleepers, straw and other things, and stagger the dried onion braids on it to form a rectangular stack with a slightly higher middle. There are several layers of reed mats on the top cover of the crib to prevent rainwater from entering and keep the crib dry.