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There is a great variety when it comes to the dormancy periods of various mushroom spores. In general, you’ll find that in the case of many different species of fungi, mushroom spores can remain dormant for extended periods, often years or even decades, under the right conditions. Their longevity is attributed to the protective spore wall and their ability to withstand harsh environmental factors.

Several factors can influence the dormancy and viability of mushroom spores. It’s a good idea to study them further, if you want to cultivate or use mushrooms in the long run:

1. Environmental Conditions: Spores can remain dormant longer when stored in cool, dark, and dry conditions. Exposure to moisture, heat, or light can reduce their viability over time.
2. Species Variation: Different mushroom species may have varying levels of spore dormancy. Some species have spores that remain viable for longer periods than others.
3. Storage: Proper storage in airtight containers, preferably in a freezer or refrigerator, can extend spore viability. Avoiding exposure to moisture is crucial. Using mushroom spore syringes for storage is usually the best option for extending the viability period of your mushroom spores.
4. Contaminants: Contaminants in the storage environment can affect spore viability. Keeping the storage area clean and free from mold or other contaminants is essential.
5. Age: The age of the spores at the time of collection can also influence their dormancy period. Fresher spores tend to have higher viability, while older ones might last far less in comparison.