Five pounds of dry organic rye berries. These are the very same berries we use in our spawn and substrate preparations.
A note on rye sourcing: Our raw organic rye berries are secured immediately after the fall harvest and shipped by the ton to our facility, where they are quickly placed into cold storage. This allows us to ensure the freshest, highest quality grains are procured quickly and cared for properly. Grain sourcing is the single most important factor in ensuring quality substrate preparation and sterilization.