Although some might consider freezing to be a viable solution for preserving edible mushrooms, there are a number of problems associated with the freezing of magic mushrooms like Psilocybe cubensis. Freezing Psilocybe cubensis mushrooms is generally not recommended, especially if you intend to preserve their psychoactive properties.
Psilocybin, the compound responsible for the psychoactive effects of these mushrooms, can be sensitive to temperature and moisture. Freezing can cause the degradation of psilocybin over time, potentially reducing the potency of the mushrooms. Freezing and thawing can also affect the texture of mushrooms. They may become mushy or slimy when thawed, which can make them less appealing for consumption.
When mushrooms thaw, they release moisture. This can lead to the growth of microorganisms, including mold, if they are not properly stored in an airtight container. Evidently, mold contamination would make the mushrooms unsafe to consume.
If you want to preserve Psilocybe cubensis mushrooms for an extended period while maintaining their potency, you can also consider alternative methods like drying. Drying mushrooms at a low temperature (e.g., using a food dehydrator) can remove moisture without significantly degrading their active ingredients. Once dried, store them in an airtight container in a cool, dark place to maintain their potency and prevent contamination.
Always exercise caution and prioritize safe use and practical preservation when handling and storing psychoactive substances. Additionally, be aware of the legal regulations of possessing psilocybe cubensis spores for research and other types of mushrooms in your location.