How do I prepare it?
Mix hardwood sawdust with bran and gypsum, hydrate to field capacity, load into bags, and sterilize.
- Combine hardwood sawdust and wheat bran in a large container and mix thoroughly.
- Add gypsum to stabilize pH and improve texture.
- Slowly hydrate with water while mixing until the substrate reaches field capacity (squeezed fist releases only a few drops).
- Load substrate into 5L bags and compress lightly to avoid air pockets.
- Fold and seal bags using an impulse sealer.
- Sterilize bags in autoclave at 15 PSI for 150 minutes.
- Allow bags to cool overnight before inoculating with grain spawn.
- Incubate at 20–23°C for 30–45 days until fully colonized.
