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Simple Substrate – Premium CVA Blend (Coir • Vermiculite • Azomite)
Why Growers Choose Simple Substrate
- Sustainably Sourced Coco Coir – Consistent hydration and structure
- Vermiculite – Improves aeration and moisture stability
- Gypsum – Supports structure and mineral balance
- Azomite – Over 70 trace minerals for enhanced biological activity
- Hydrated to Field Capacity – Ready to mix with grain spawn
- Prepared in Unicorn XLS-A Bags – Clean handling and reliable performance
- Vacuum-Sealed Secondary Protection – Extended shelf stability
Available Sizes
- 3lb
- 5lb
- 10lb (2 × 5lb bags)
- 20lb (4 × 5lb bags)
Quick Start Guide
| Step | Instructions |
|---|---|
| 1. Prepare Grain Spawn | Use fully colonized grain for best results. |
| 2. Mix | Combine colonized grain with substrate at a 1:1 to 1:3 ratio in a clean container or bag. |
| 3. Incubate | Store at 70–75°F until fully colonized (typically 7–14 days). |
| 4. Introduce Fruiting Conditions | Provide indirect light, fresh air exchange, and proper humidity. |
| 5. Harvest | Harvest at maturity. Additional flushes may be possible with proper care. |
Storage Guidelines
- Store sealed between 45°F and 70°F
- Best used within 30–60 days of receipt
- Do not freeze
Looking for Something More Advanced?
Upgrade to our Not So Simple Substrate for added nutrients, or explore Masters Mix for hardwood-based applications.
Use the chat button in the lower right and we’ll help you match substrate to your grain and setup.
For laboratory use only. Results vary based on environment and genetics. Sales are final, with concerns handled case-by-case.
Let customers speak for us
the grain: i picked milo took off nicely, 2 cc’s per bag, 5 bags per syringe. Works very nice, bags will be done withing a week. I should break and shake right now but, I think ill wait another week or so. As for the bulk substrate, looks great ive been keeping it in our storage room, its super chilly in there. And, it should work great when the time comes. Personally, ive never had issues with any of the bags ive purchased. I hardly inoc in my SAB anymore, as theres no need I just flame sterilize the needle, and inoculate.
The best , that can be obtained.
They are what they are.
Haha I finally got some before they ran out!
It works 💪
Exactly what i wanted!
Great products!
Absolutely great grains! Everything I have ever purchased from here is amazing and solid 🙌🏽
Everything arrived safely and packaged very thoughtfully. Grain looks great!
Superb quality as always 👌🏽
Finally got around to using the substrate and wow, loving my results. Forever gonna be my go to!! Def beats making my own.
Great stuff. 👍
Plates looked great! All arrived with no spots of contamination and only one had any condensation on them!
Bags arrived intact and packed with care. Signs of growth in just a couple days! So far so good!
Came packaged vacuum sealed which is great and i really appreciate that, 🙏🏽 smells very clean and everything came shipped way faster than expected, will post another review after results! Highly recommend 👌🏽
Great moisture content, all in all a really good product cant go wrong here, the myc loves this stuff, truly.
