Generally speaking, the shelf life of dried mushrooms is about two years, and the shelf life of some products is six months. The shelf life is mainly affected by temperature and humidity. If dried mushrooms are found to have peculiar smell, discoloration or moisture, they may be out of date and cannot be eaten.

Here are some ways to extend the shelf life of dried mushrooms:

1. Sealed storage: put the dried mushrooms in a sealed container, and put some desiccant in the container to absorb the moisture in the air.

2. Storage away from light: Store dried mushrooms in a place away from light to avoid the influence of light on mushrooms.

2. Low temperature storage: storing dried mushrooms in a low temperature environment, such as a refrigerator or a cold storage, can prolong the shelf life of mushrooms.

3. Dry storage: Store dried mushrooms in a dry place to avoid dampness or mildew.