Our 3 lb sterilized Master's Mix substrate bag is a balanced blend of hardwood fuel pellets and soy hulls – widely regarded as one of the most effective fruiting substrates for gourmet and medicinal mushrooms. This high-nutrient, high-yield formula offers excellent water retention, structural integrity, and dense nutritional value, making it a top choice for species like Pleurotus (oyster), Hericium (lion's mane), and others known for thriving on enriched wood-based substrates. 

Fully sterilized and ready to use, this substate is ideal for monotub, bag, or bottle cultivation. 

Highlights

• Pre-sterilized and ready to use 
• Classic 50/50 Master's Mix: hardwood fuel pellets + soy hulls
• High-yield substrate ideal for edible and medicinal species
• Excellent water retention and nutrient density
• Works well in monotubs, grow bags, or bottles
• Also available in 5 lb size

Quantity Prices

• 1–4: $14.95 each
• 5–9: $13.95 each
• 10–29: $12.95 each
• 30+: $11.95 each

Discount automatically applies at checkout