How To Store Magic Mushrooms and Magic Truffles for a Long Time? Mushrooms and truffles can be eaten either fresh or dried, the main difference between the two, apart from the very different intake amounts due to the water contained in the fresh ones, being the shelf life. Fresh mushrooms last only a few days if they are kept in the refrigerator, while fresh truffles last up to a maximum of 2 months if kept in a vacuum in the refrigerator, but often the actual storage time is shorter, about a month or less. how to store magic mushrooms