Premium Sterilised CVG Mushroom Substrate UK– Coco Coir, Vermiculite & Gypsum
*Please note that these bags need fully colonized grain spawn rather than spores in order to colonise further. Spores on their own will not work in conjunction with this bag*
Looking for maximum mushroom yields? Our Premium CVG substrate bags are pre-prepared with a premium blend of coco coir, vermiculite, and gypsum – the industry standard mix for strong, healthy mushroom cultivation. Designed to hold the perfect balance of moisture and nutrients, this quality substrate creates the ideal environment for rapid colonisation and robust harvests.
Unlike cheaper substrates that arrive too wet or poorly sterilised, our CVG is hydrated to field capacity and sterilised in a computer-controlled industrial autoclave at 121°C. This ensures minimal contamination risk and reliable results every time.
No complex setups or costly lab gear required – we’ve done the hard work for you. Simply open the bag, add your fully colonised grain spawn, and watch your mushrooms thrive. Get growing fast with our mushroom grow bags uk.
Why Choose Our CVG Substrate?
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✅ Optimally hydrated CVG blend – perfect balance of moisture and structure.
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✅ Rapid colonisation – supports strong, healthy mycelium and spore cultivation.
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✅ Big yields at home – save money and grow mushrooms you can’t buy in shops.
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✅ Discreet & low-maintenance – no strong smells, minimal space required.
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✅ Ready-to-use bags – professionally sterilised for reliable results.
Ingredients & Sterilisation Process
Our premium CVG mushroom mix is produced and sent out within the UK. Great mushrooms depend on great substrate. That’s why we only use 100% natural and organic CVG blend – nothing more, nothing less.
Our process:
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Premium coco coir, vermiculite, and gypsum carefully blended.
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Hydrated to field capacity (~optimal water content).
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Sterilised in an autoclave at 121°C for 2 hours.
The result: a nutrient-rich, contamination-resistant substrate that helps your mycelium colonise faster, fruit more consistently, and deliver larger harvests.
What’s Included
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2kg or 3kg sterile CVG substrate (depending on your selection).
Please note: Spore or liquid culture syringes are not included.
Storage
For best results, use your CVG substrate shortly after arrival. If storing, keep in the fridge – it will remain viable for up to 3 months.
Important Legal Notice (UK)
Growing magic mushrooms is illegal in the UK. These products are sold strictly for gourmet mushroom cultivation or microscopy research. OnlySpores cannot be held responsible for any unlawful use. Please check your local regulations before use.
