CVG COCO • VERMICULITE • GYPSUM Sterile Bulk Substrate
The reliable, low-drama base for clean colonization and dense pinsets.
WHY CVG
CVG is a balanced, beginner-friendly bulk substrate that keeps things simple: low nitrogen, low bacterial load, and great structure. It holds moisture, breathes well, and gives your spawn a stable runway to rip through and fruit hard.
WHAT’S INSIDE
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Washed, buffered coco coir for structure and steady hydration
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Asbestos-free, horticulture-grade vermiculite (U.S. sourced) for moisture retention and aeration
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OMRI-listed gypsum (calcium sulfate) to stabilize pH and support strong mycelial run
FEATURES
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Ready to use—no prep or pasteurizing
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Consistent texture for even colonization
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Low contamination risk when handled cleanly
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Ideal as a stand-alone bulk or as a base in mixed recipes
HOW TO MIX (SPAWN:SUBSTRATE)
Start with 1 colonized grain spawn bag to 2–3 bags of CVG.
Higher spawn rates can shorten colonization and help outcompete contaminants.
BEST PRACTICES
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Work clean: wash hands, wear nitrile/latex gloves, and keep your workspace tidy.
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Break up and mix thoroughly so spawn is evenly distributed—aim for a fine, airy surface micro-texture.
STORAGE
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Keep at room temperature, out of direct sunlight.
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No refrigeration needed.
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Stores for months unopened; avoid freezing.
Heads-up: Know your local laws and species guidelines. Bruise Blue provides sterile substrates and gear—what you choose to cultivate is your call.
Pairs well with
In stock! Ships within 1-2 business days.
Pallet Pricing Available upon Request
No BS Quality Guarentee
Accurate and Honest Shipping Costs
Best Inoculated Using Bruise Blue Sterile Grain
CVG COCO • VERMICULITE • GYPSUM Sterile Bulk Substrate
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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Shipping Information
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FAQ’s
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Contact Us
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Bruise Blue Substrates make Canopies
Our subs are built for canopy runs—nutrient-dense, truly sterile, and tuned for the texture and moisture your mycelium wants to rip through. Pair them with clean, fully colonized grain at a solid spawn ratio (think 1:2–1:4), mix evenly, and you’ll set the stage for fast colonization, tight knotting, and wall-to-wall pinsets. The structure holds moisture without going soggy, so fruits develop thick and even under proper FAE and humidity. Do your part on cleanliness and environment; Sour subs handle the rest—flat, full canopies that make tubs look like fields.
Organic Grains | Better Runs
Because they’re clean, consistent, and built to colonize fast. Our organic grain bags start with responsibly sourced organic grain, hydrated for optimal moisture and pressure-sterilized in-bag for a true blank slate. The kernel size and texture are dialed to maximize surface area (read: more inoculation points, faster run times) without turning mushy or clumpy. Each bag ships with a filter patch and self-healing injection port, lot-tracked and QC-checked so you know exactly what you’re working with. Result: aggressive, even colonization, fewer headaches, and reliable performance at scale—exactly what “best” should feel like in a grow room.
FAQs
Please read our FAQ page to find out more.
What makes Bruise Blue different?
Best prices, true bulk options, fast ship times, and clean, lab-sterilized product. No fluff—just stuff that performs. This is a mushroom company made by mushroom growers. We hope that it shows in our product.
Why Isn't there free shipping?
Because “free” isn’t free. Most sellers bake shipping into higher product prices. We don’t. At Bruise Blue, you pay exactly what it costs us to get your order to you—no markups, no “handling” fluff, no BS. That keeps our bags priced as low as possible and your shipping transparent. We pass through real carrier rates (and our discounts) and combine items to save where we can. Need a freight quote for pallets? Reach out and we’ll price it straight.
What are your shipping times?
Orders usually leave in 1–2 business days. Bulk and pallet orders may need a short lead time—ask if you’re on a deadline.
What if my order arrives damaged or looks off?
We'll replace it.
Do you ship discretely?
Plain boxes, simple labeling. We ship to the address you provide—please ensure deliveries are permitted in your area.