3lbs Sterilized Mushroom Substrate – Master Mix Blend for Maximum Yields

3lbs Sterilized Mushroom Substrate – Master Mix Blend for Maximum Yields

Grow healthier, heartier mushrooms with our premium Sterilized Substrate featuring the Master Mix formula—a proven blend of hardwood sawdust, soybean hulls, and optimal moisture content to promote vigorous mycelial growth and heavy fruiting.

Prepared under sterile conditions and ready to use out of the bag, this substrate is ideal for expanding colonized grain spawn of gourmet and medicinal species like Lion’s Mane, Oyster, King Oyster, Chestnut, and more.

Product Features:

• 🌱 Master Mix Formula (50/50 Hardwood Sawdust & Soy Hulls) – high in nutrition and perfect for commercial or hobby grows

• 🔥 Fully Sterilized – lab-processed and sealed to ensure a clean, contaminant-free start

• 📦 Convenient & Ready to Use – no mixing, pasteurizing, or guesswork required

• 💪 Optimized for High Yields – ideal structure and nutrients to support dense, healthy flushes

• ✅ Perfect for Bag, Bin, or Bucket Grows – works with monotubs, grow bags, or custom containers

How to Use: Mix with fully colonized grain spawn at a 1:3 to 1:5 ratio. Incubate at 65–75°F until fully colonized, then initiate fruiting conditions.

Whether you're a beginner or a pro, our Master Mix Substrate gives your mushrooms the rich, supportive environment they need to thrive.
Sterile. Simple. Successful.