Out-Grow offers a wide selection of sterilized grain spawn, carefully prepared for optimal mushroom cultivation. Each bag or jar of grain spawn is fully hydrated, sterilized, and ready for inoculation, providing an ideal environment for mushroom mycelium to thrive. Whether you’re growing gourmet or medicinal mushrooms, our grain spawn ensures healthy, consistent growth for every batch. Perfect for all levels of growers, from beginners to experts, our sterilized grain spawn is a reliable foundation for successful cultivation.