The longevity of a spore syringe can vary depending on various factors, such as the type of mushroom spores and storage conditions. Generally, a spore syringe can maintain its viability for at least a month when refrigerated, and in some cases, it may remain viable for up to two years.
However, it is important to note that the longer a spore syringe is stored, the greater the chance of decreased viability. Therefore, it is highly recommended to use the spore syringe as soon as possible to ensure optimal results.
Furthermore, proper storage conditions are crucial for maintaining the potency of the spore syringe. The syringe should be stored in a cool, dry place away from direct sunlight, heat, or excessive moisture, which can damage the spores and reduce their efficacy. By following these guidelines, you can help ensure that your spore syringe remains viable for as long as possible.