2kg Master Mix Substrate Bag (All-In-One Grain & 50/50 Mix)

Ideal for wood-loving mushrooms like Oysters, Lion’s Mane and Chestnuts. Ready to be inoculated with your own liquid culture or spore syringe, this bag is layered to handle both the spawn run and the bulk fruiting phase in one container.

The All-In-One Layered Design

• Starter layer (rye grain): the bottom of the bag is packed with hydrated rye grain to get your culture running fast.

• Bulk layer (Master Mix): the top two-thirds is a 50/50 blend of hardwood sawdust and soy hulls for big yields.

Sterile & Clean-Room Sealed

Bags are autoclaved with core temperatures monitored, then cooled and sealed in a Class 100 clean room.

Storage & Care

• Stand bags upright, away from the filter patch.

• Keep filters dry with good airflow – don't seal bags in a closed cupboard.

• Store dark and cool, below 20°C (not in the fridge).

Inoculation to Fruiting

1. Wipe the self-healing injection port with an alcohol swab.

2. Flame-sterilise your syringe needle and let it cool.

3. Inject 4–10ml of culture into the bottom rye grain layer.

4. Incubate dark, with airflow, at 16–20°C.

5. Once the grain is fully white, massage the bag to mix it through the Master Mix.

6. When fully colonised, cut a small slit, add fresh air and humidity, and let it fruit.