Simple Substrate – Premium CVG Blend (Coir • Vermiculite • Gypsum) Clean. Balanced. Reliable. Our Simple Substrate is a carefully balanced CVA blend of sustainably sourced coco coir, vermiculite, and gypsum, designed to support strong, even mycelial colonization. Hydrated to field capacity and prepared in Unicorn XLS-A bags, this substrate offers excellent moisture retention, airflow, and mineral support. 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 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. Need Help Choosing?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.
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