Masters Mix Substrate Bag - 5 lb

Masters Mix — Premium Hardwood Substrate

The gold standard for wood-loving species. Masters Mix is a blend of hardwood sawdust and soy hulls that delivers superior yields for Lion's Mane, Oysters, Shiitake, Reishi, and other wood-decomposing mushrooms. Pre-supplemented and hydrated to the right moisture content — just mix with colonized spawn and fruit. If you're growing anything that loves hardwood, this is the substrate that pros reach for.

Specifications

• Composition: Hardwood sawdust + soy hulls
• Weight: 5 lb
• Use case: Wood-loving species fruiting blocks and monotubs
• Best for: Lion's Mane, Oysters, Shiitake, Reishi, and other hardwood species

How to Use

• Break up fully colonized grain spawn in its bag.
• Open the Masters Mix bag and mix spawn in at your preferred ratio (1:2 to 1:4).
• Pack into a fruiting container or monotub and level the surface.
• Allow to colonize (10-21 days), then introduce fruiting conditions.

Storage

Store at room temperature, use within 30 days. Do not refrigerate. Keep sealed until ready to use to maintain moisture and cleanliness.

Quality & COA

Each batch is prepared and sealed under clean conditions. Representative samples are inspected for proper moisture content and consistency before release.

How to Use This Substrate

1. Break up your colonized grain spawn into individual grains by massaging the spawn bag.
2. Mix spawn with substrate at a 1:3 ratio (one part spawn to three parts substrate) in a clean environment.
3. Pack into a monotub or grow bag and level the surface.
4. Incubate at 70-75°F until the substrate is fully colonized (white mycelium throughout).
5. Introduce fruiting conditions — increase fresh air exchange and maintain 80-90% humidity.

Tip: Pre-pasteurized substrate is ready to use — no additional sterilization needed. Open the bag in a clean area and work quickly to minimize contamination risk.

What's in the Box

• 1x pre-pasteurized substrate bag (CVG or Masters Mix, 5lb or 10lb)