Our premium organic blue oyster grain spawn is the perfect starting point for cultivating delicious and beautiful blue oyster mushrooms (Pleurotus ostreatus). Made with high-quality organic millet, this grain spawn is fully colonized with a vigorous, high-yielding strain, ensuring rapid colonization of your chosen substrate. Key Features: Organic Millet, Pleurotus ostreatus (Blue Oyster) Strain, Fully Colonized, Ready to Use, Fast Colonization, High Yield Potential, Ideal for Logs, Straw, and Sawdust, Suitable for Beginners and Experienced Growers, 3lbs Bag. Storage: Refrigerate. Detailed instructions included.