Mushrooms need to be refrigerated continually to maintain quality. Store mushrooms in their original packaging or in a porous paper bag for prolonged shelf-life, avoiding plastic bags as that encourages spoilage. Shelf-life varies depending on the mushroom type:
White Button: 7-9 days
Portabella: 9-11 days
Baby Bella: 7-9 days
Oyster: Up to 7 days
Shiitake: Up to 14 days