Store whole, unpeeled onions in a cool, dry, dark, well-ventilated place
Keep onions away from direct sunlight and moisture
Use mesh bags, baskets, or open crates for airflow
Do not store onions in plastic bags
Keep onions separate from potatoes
Avoid storing onions near heat sources
Check regularly and remove any soft, sprouting, or moldy onions
Cure freshly harvested onions before storage
Trim tops and roots after curing
Refrigerate cut onions in an airtight container
Freeze chopped onions for long-term use
Dehydrate onions for shelf-stable storage
Pickle onions for extended preservation
Store green onions in the refrigerator with roots in water or wrapped in a damp paper towel
Use onions with damaged skins first