We recommend storing mycorrhizae in a cool (between 39-77°F), dry environment, and avoid direct exposure to sunlight. Also, try to protect the product against extreme temperature variation prior to application (below freezing or above 95 °F).
Trifecta Natural Solutions takes the utmost precautions and attempts to ensure the respect of these conditions during all manufacturing steps and transportation of the product. Brief exposure to more extreme temperatures during shipping is not an issue of major concern. If the product were stored frozen or in extreme heat for weeks or months, it will start to impact the viability of some of the spores.