Masters Mix Mushroom Substrate
(60% Oak Pellets / 40% Soybean Pellets)
Available in:
Every Masters Mix substrate bag sold to the public is sterilized for 3.5 hours in industry-trusted All American 41qt pressure cookers to ensure maximum purity, moisture balance, and performance.
This premium blend has been tested and refined in-house for consistent results across gourmet and medicinal mushroom species—especially Lion’s Mane, Pioppino, Chestnut, Reishi, and Oysters.
9 × 4.5lb bags fit in a small box ($35 shipping)
8 × 10lb bags fit in a medium box ($130 shipping)
(Shipping included on orders over $60. Just being transparent on how many fit per box size.)
🍄 Why Masters Mix?
Masters Mix is the industry gold standard for hardwood-loving mushrooms—offering a perfect balance of nutrition, structure, and moisture retention. Our blend combines the long-lasting texture of pure oak sawdust with the protein-rich boost of soybean hull pellets to maximize biological efficiency and fruiting potential.
🔬 1. Optimized Nutrition & Structure
The 60/40 ratio of oak to soy provides both slow-release carbohydrates and abundant nitrogen—an ideal environment for dense mycelial growth and high-yield flushes.
🌡️ 2. Fully Sterilized for Clean Colonization
Each bag is sterilized for 3.5 hours under precise conditions, ensuring a contamination-free foundation ready to inoculate directly with grain spawn or liquid culture.
🪵 3. 100% Hardwood Source
We use oak pellets only—no pine, no mixed woods—to ensure consistent lignin content and optimal structural support during fruiting.
🫘 4. Soy Hulls = High Performance
Soybean pellets (40%) are a superior nutrient source, providing extra nitrogen and lipids that significantly improve colonization speed and biological efficiency compared to pure sawdust blocks.
🔁 5. Proven Results & Reusability
Trusted by both hobbyists and commercial growers, Masters Mix blocks deliver fast colonization and full flushes across multiple species. Many growers even rehydrate and reuse the spent substrate for outdoor beds or compost.
⚖️ In Summary:
Masters Mix (60% Oak / 40% Soy) = Sterile, Balanced, and Ready to Grow.
Each bag is built for maximum yield, minimal contamination, and consistent performance from start to finish.
You might pay slightly more than DIY, but the time savings, reduced contamination risk, and uniform results make it the go-to choice for serious cultivators.
Masters Mix Mushroom Substrate
(60% Oak Pellets / 40% Soybean Pellets)
Available in:
Every Masters Mix substrate bag sold to the public is sterilized for 3.5 hours in industry-trusted All American 41qt pressure cookers to ensure maximum purity, moisture balance, and performance.
This premium blend has been tested and refined in-house for consistent results across gourmet and medicinal mushroom species—especially Lion’s Mane, Pioppino, Chestnut, Reishi, and Oysters.
9 × 4.5lb bags fit in a small box ($35 shipping)
8 × 10lb bags fit in a medium box ($130 shipping)
(Shipping included on orders over $60. Just being transparent on how many fit per box size.)
🍄 Why Masters Mix?
Masters Mix is the industry gold standard for hardwood-loving mushrooms—offering a perfect balance of nutrition, structure, and moisture retention. Our blend combines the long-lasting texture of pure oak sawdust with the protein-rich boost of soybean hull pellets to maximize biological efficiency and fruiting potential.
🔬 1. Optimized Nutrition & Structure
The 60/40 ratio of oak to soy provides both slow-release carbohydrates and abundant nitrogen—an ideal environment for dense mycelial growth and high-yield flushes.
🌡️ 2. Fully Sterilized for Clean Colonization
Each bag is sterilized for 3.5 hours under precise conditions, ensuring a contamination-free foundation ready to inoculate directly with grain spawn or liquid culture.
🪵 3. 100% Hardwood Source
We use oak pellets only—no pine, no mixed woods—to ensure consistent lignin content and optimal structural support during fruiting.
🫘 4. Soy Hulls = High Performance
Soybean pellets (40%) are a superior nutrient source, providing extra nitrogen and lipids that significantly improve colonization speed and biological efficiency compared to pure sawdust blocks.
🔁 5. Proven Results & Reusability
Trusted by both hobbyists and commercial growers, Masters Mix blocks deliver fast colonization and full flushes across multiple species. Many growers even rehydrate and reuse the spent substrate for outdoor beds or compost.
⚖️ In Summary:
Masters Mix (60% Oak / 40% Soy) = Sterile, Balanced, and Ready to Grow.
Each bag is built for maximum yield, minimal contamination, and consistent performance from start to finish.
You might pay slightly more than DIY, but the time savings, reduced contamination risk, and uniform results make it the go-to choice for serious cultivators.
Image 1 of 4
Image 2 of 4
Image 3 of 4
Image 4 of 4