Sterilized Master’s Mix Substrate – 5 lb Bag, Ready for Inoculation
50/50 hardwood & soy hulls, hydrated and autoclaved—open, inoculate and harvest up to 3 lb gourmet fungi.
Description
Professional-Grade Substrate, Zero Prep Time
Skip the soaking, mixing and pressure cooking—our Sterilized Master’s Mix Substrate arrives fully hydrated, perfectly pH-balanced and autoclave-sterilized for immediate inoculation. The classic 50 % hardwood sawdust + 50 % soybean-hull recipe delivers 120 %+ biological efficiency for oysters, lion’s mane, chestnut and other gourmet fungi.
Key Features
- Optimal C : N Ratio • Soybean hulls elevate nitrogen for explosive mycelial growth.
- Moisture Dialed In • Hydrated to ~60 %, eliminating guesswork and contamination risk.
- 0.2 µm Filter Patch Bag • Premium gusseted polypropylene bag resists 15 psi and enables gas exchange right to first flush.
- Clean–Room Sterilized • Autoclaved at 121 °C for 3 h, then sealed in a HEPA-filtered lab.
- Ready on Arrival • Simply inject liquid culture, grain spawn or agar wedge and incubate.
Specifications
| Net Weight | 5 lb (≈ 2.27 kg) wet |
|---|---|
| Bag Size | 8 × 5 × 19 in – gusseted with 0.2 µm filter |
| Recipe | 50 % hardwood fuel pellets / 50 % soybean hull pellets + 1 % gypsum |
| Sterilization | 121 °C @ 15 psi for 3 hours |
| Shelf Life | 3 months ★ store ≤ 75 °F away from direct sunlight |
Suggested Use
- Sanitize your workspace (70 % isopropyl) and flame your inoculation tool.
- Inject 60–120 ml liquid culture or 1 lb fully colonized grain spawn.
- Shake to distribute, then incubate at 72–75 °F (22–24 °C).
- Allow 100 % colonization + 3-day consolidation before moving to fruiting.
Yield Expectations
One 5 lb block typically produces 2–3 lb fresh mushrooms over two flushes when fruiting conditions are maintained at 85–90 % RH and adequate fresh-air exchange.
Shipping & Handling
- Packed in double-wall cartons with biodegradable void fill.
- Orders placed before 1 PM ET ship same day (Mon–Fri).
- Summer heat-pack included free when ambient temp > 90 °F.
Grow gourmet harvests without the hassle—fuel your fungi with sterilized Master’s Mix today!
