Masters Mix Substrate | Sterile 50/50 Hardwood & Soy Hull Blend Masters Mix substrate is a high-performance 50/50 blend of oak hardwood and soy hulls, designed for fast colonization, strong growth, and reliable results with gourmet wood-loving mushroom varieties. The Gold Standard for Gourmet Mushroom Substrate Our Masters Mix Substrate is professionally prepared using a balanced blend of oak hardwood sawdust and soy hulls. This nutrient-rich formula provides the structure, moisture, and food source needed to support aggressive colonization and heavy fruiting. Premium Ingredients Oak Hardwood Sawdust Provides structure, airflow, and long-lasting nutrition for wood-loving varieties. Soy Hulls Adds rich nutrition and a fibrous structure that supports strong mycelium growth and colonization. Reverse Osmosis Water Provides clean, consistent hydration without unwanted minerals or contaminants. Why Choose Our Masters Mix? 50/50 Hardwood & Soy Hull Formula: Balanced for strong growth and reliable performance. Hydrated to Field Capacity: Proper moisture content for efficient colonization. Commercial Autoclave Sterilized: Prepared for clean, consistent results. Packaged in Unicorn XLS-A or 14A Bags: Durable polypropylene bags with breathable filter patches. Ready to Use: No soaking, mixing, or sterilizing required. Best Used For Masters Mix is ideal for gourmet wood-loving varieties such as oyster mushrooms, lion's mane, chestnut, and other species that perform well on supplemented hardwood substrates. Quick Start Guide Inspect: Make sure the bag, seal, and filter patch are intact. Add Colonized Grain Spawn: Work in a clean environment and add fully colonized grain spawn. Mix Thoroughly: Break up the grain and distribute it evenly through the substrate. Incubate: Store at 65–78°F until fully colonized. Begin Fruiting Conditions: Introduce fresh air, humidity, and appropriate lighting once colonized. Storage Store sealed between 45–70°F. Best used within 30–45 days of receipt. Avoid freezing, direct sunlight, or prolonged heat exposure. Complete your setup: Pair Masters Mix with our Sterile Grain Bags for a clean, ready-to-use workflow. ✅ For legal gourmet/culinary/medicinal mushroom cultivation only. This kit is intended exclusively for growing edible gourmet, culinary, and medicinal mushroom species. Not intended for any illegal use.
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