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Sterile Substrate Mix | CVG 2000 ml & 4000 ml Bag
Ready-to-use sterile CVG substrate mix combining coconut coir, vermiculite and gypsum, perfectly hydrated to field capacity and professionally sterilised. Ideal for Psilocybe cubensis, king oyster, wine cap and other bulk-substrate species. Available in 2000 ml and 4000 ml bags with 5.0 μm filter patch and self-healing injection port for direct inoculation.
Availability: In stock
As low as: €14.95
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Product Description
Details
Skip the messiest part of mushroom cultivation. Our sterile CVG substrate mix arrives ready to inoculate — no rehydration, no pasteurisation, no contamination guesswork. Each bag has been pressure-cooked to professional standards and hydrated to the exact moisture content fungi prefer.
Product specifications
- Available sizes: 2000 ml and 4000 ml bags
- Composition: classic CVG — coconut coir, vermiculite and gypsum (2:2:1 by volume)
- Field capacity: 65–70% moisture content by weight, the optimum for fruiting
- Packaging: autoclavable bag with 5.0 μm micro-filter for gas exchange
- Inoculation: self-healing injection port included
- Sterilisation: every batch professionally autoclaved and quality-controlled
Why CVG works so well
CVG stands for Coco coir, Vermiculite and Gypsum — the gold-standard bulk substrate in modern mycology. The coconut coir provides bulk and water retention, the vermiculite creates the air pockets mycelium needs to breathe, and the gypsum (calcium sulphate dihydrate) buffers the pH around 6.5–7.0 while supplying calcium and sulphur. Together they deliver consistent yields, fast colonisation and outstanding contamination resistance.
Which mushrooms grow well on this mix — and which don't
Our CVG mix is the right choice for manure-loving and bulk-substrate species:
- Psilocybe cubensis — all strains (B+, Golden Teacher, PES, etc.)
- Pleurotus eryngii — king oyster mushroom
- Stropharia rugosoannulata — wine cap / king stropharia
- Agaricus species — button mushroom (with manure supplement)
For wood-loving species like Psilocybe azurescens, Psilocybe cyanescens, shiitake, lion's mane or reishi, choose our beech woodchips or wheat-straw substrate instead: .
How to use
- Prepare — work in a clean space, wipe surfaces with isopropyl alcohol
- Inoculate — add your fully colonised grain spawn ( ) at a 1:2 spawn-to-substrate ratio by weight
- Mix — break up the spawn through the substrate inside the sealed bag
- Incubate — keep at 24–27 °C in the dark until fully colonised (10–18 days)
- Fruit — introduce fresh air exchange, light and surface misting to trigger pinning
Pasteurised, not sterilised in use — here's why it matters
Bulk substrates like CVG are pasteurised, not sterilised after inoculation. Pasteurisation (65–82 °C for 1–2 hours) eliminates harmful contaminants while leaving beneficial micro-organisms alive — those help mycelium outcompete unwanted moulds. Our bags arrive sterile because they're factory-autoclaved sealed; once you open and inoculate, the bag environment behaves as a clean pasteurised substrate.
Storage
Store unopened bags at room temperature, away from direct sunlight. No refrigeration required. Shelf life is several months when the bag and filter remain intact.
Need extras?
Pair this CVG mix with sterile grain spawn for fast results, or boost the pH and calcium content with additional gypsum: .
Additional Info
Additional Info
| Productcode | MCS.SUBS.CONF.COVC |
|---|---|
| Weight (KG) | N/A |
| Origin | Netherlands |
| Sterile | No |
Customer Reviews
5 Item(s)
per page
- PERFECT ! Review by frederic
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perfect subtrate, would recommended for every grower. (Posted on 12/12/2025)Rating - Thumbs up Review by Manuel
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Perfect humidity and sterile substrate. (Posted on 11/16/2025)Rating - Good mix... Review by Jorge
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These coco are well mixed with the right amount of vermiticule and the right water, só that u dont need to do anything but just join this substract to Ur spawn. (Posted on 10/25/2025)Rating - great substrate Review by frederic
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delivered with the perfect amount of humidity ! (Posted on 10/24/2025)Rating - All good Review by Sehuti
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Fast delivery, nice package, sterile, ordering every month (Posted on 5/30/2025)Rating
5 Item(s)
per page
