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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.
Unlock the Secrets: What's Inside Your Substrate
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100% Oak pellets
Oak pellets deliver nutrients, moisture retention, and ideal texture for fast colonization and reliable yields.
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Soy Hull Pellets
Soy hulls provide rich nutrients and a fibrous structure that supports strong mycelium growth and colonization, while remaining cost-effective and widely available.
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Revers Osmosis Water
RO water is free from contaminants and minerals, providing clean hydration that supports healthy mycelium growth and balanced substrate conditions.
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Let customers speak for us
The substrate had a perfect moisture content .Ive used it 5 times now with great results. There grains and drippy corn are really good to.
Consistent lab work quality!!
Shippment was clean & packaged securely! Product quality is top tier too Love it!
Better product compared to the mainstream basics that others sell! 2nd time purchasing & i plan on coming back for more! Solid & consistent!
looks good delivered super fast double bagged
so far so good will find out soon(next review)
Quality products from a trusted source.
Always right. Great customer service.
Great
Great and very pleased as i always am ordering with yall.
N theres always a different sticker, love it!!
Always the best from Mycology Simplified and one of the kindest people I know runs the whole show. Buy with confidence and have consistent results.
Clean, sleek colors and loved by the mycelium
I love everything Ive ever ordered from mycology Simplified ! You can count on agar plates being sterile with zero condensation every time. Thanks guys.
everything came a day early and both the spawn bag and substrate bag were individually vaccuum sealed.
The best quality I have ever bought!
Exactly what i needed in quality!