Uncle Myc's Master's Mix Bulk Substrate - 4 Lb

Sterilized Hardwood and Soy Hull Substrate - 4 Lb

Contamination can undo a fruiting run before it begins, and mixing and sterilizing your own substrate takes time and equipment. This substrate is sterilized in certified autoclaves and blends hardwood with soy hulls, so you can start from a clean, consistent base.

At 4 Lb, this unit suits hobbyists, first-time growers and small trial batches. Regular indoor growers can buy several units to test a new species or technique before scaling up.

Key Features & Benefits

• Autoclave sterilization — sterilized in certified autoclaves to support a clean start.
• Hardwood and soy hull blend — combines a hardwood structure with soy hulls as a nutrient source.
• Made for gourmet and medicinal species — formulated for that range of cultivation.
• Single 4 Lb unit — lets you buy only what a trial or small project needs.

Who Should Use Master's Mix Bulk Substrate

Hobbyists and small-scale indoor growers who want a pre-sterilized base for gourmet or medicinal cultivation. It also suits commercial growers running small test batches.

About Uncle Myc's Master's Mix Bulk Substrate

Uncle Myc's Master's Mix is a substrate made from hardwood and soy hulls in equal parts. It is sterilized in certified autoclaves and sold as a single 4 Lb unit with a shipping weight of 4.4 lb.

Frequently Asked Questions

Q: What is in this substrate?
A: It combines hardwood and soy hulls in a 50/50 split. The hardwood gives structure and the soy hulls add nutrition.

Q: What does autoclave sterilization mean?
A: An autoclave uses pressurized steam to sterilize material. This reduces the organisms that compete with your culture during colonization.

Q: Is it suited to beginners?
A: The 4 Lb size keeps cost and risk low for a first run. You still need clean technique when you add your culture.

Q: Which species is it made for?
A: It is designed for gourmet and medicinal species. Check your chosen species' needs before you commit to a larger batch.

Q: How should I store it?
A: Keep it sealed, in a clean, cool place, until you are ready to use it. Opening it early exposes it to contaminants.