• a bag of sterile cvg substrate by spore supplies for mushroom cultivation
  • quick instructions for using Spore Supplies sterile substrate with QR code link to a full guide
  • a pile of cvg substrate for mushroom growing
  • detailed instructions for using Spore Supplies sterile substrate
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Spore Supplies

Sterilised CVG Mushroom Substrate Bag

Sterilised CVG Mushroom Substrate Bag

£18.99 GBP
£18.99 GBP
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CVG substrate bags are ideal for growing exotic and functional mushroom species. This classic tek mix of coco coir, vermiculite and gypsum will create the perfect environment for your mycelium. We test optimal field capacity on every batch, so your fungi strains will enjoy a perfect moisture level that boosts yields. 

All of our substrates are sterilised in our medical-grade autoclave for 1 hour and 30 minutes, with at least a pressure of 15 PSI. This gives our blocks enough time at a minimum of 121ºC to reach the centre of the bag, ensuring all micro-organisms are killed off. We then open the autoclave inside our cleanroom and heat seal the mushroom grow bag in front of a laminar flow hood to stop any contaminants getting in.   

Features

  • Mushroom Substrate Mix
  • Coco Coir, Vermiculite, Gypsum
  • Space For Grain Spawn
  • XLS-A Unicorn Bag
  • For Spawn To Substrate Growth
  • Autoclaved For 1 Hour 30 Minutes
  • Sealed In Cleanroom
  • 'How To' Guide Included

What you can grow

Recommended

Not recommended

  • Chicken Of The WoodsLaetiporus sulphureus
  • Dryad's SaddleCerioporus squamosus
  • ReishiGanoderma lucidum
  • Turkey TailTrametes versicolor
  • Wood EarAuricularia auricula-judae

Several of these fruit better on our wood-based blend. See the Masters Mix - 4kg Sterilised Mushroom Substrate Bag.

What's Included

  • CVG Substrate In An XLS-A Unicorn Bag

Not Included

  • Grain Spawn
  • Aseptic Technique Kit
  • Misting Bottle

How To Use

To use this CVG substrate (using aseptic technique) cut along the top of the bag and add colonised grain spawn (sold separately). Use up to 1kg of spawn with the 2kg CVG bag and up to 1.5kg with the 3kg version. Then, seal the block back up using either a zip tie or heat sealer. To finish off, mix the spawn and substrate evenly before popping your block in ideal growing conditions for colonisation. From there you can simply leave the rest of the work to the mycelium! Check out our How To Use Your Substrate guide for more detailed advice.    

Storage Instructions

All sterile bags should be removed from any delivery packaging immediately after being received. This allows the filter patch to breathe, which prevents moisture from passing through the filter and drawing contaminants into the bag.

We recommend storing the bags upright, in a cool, dark place like a cupboard, for up to 7 days to observe that the bag is sterile before use. Do not store in the fridge. All bags can be stored for up to 6 weeks, but should be used as soon as possible. Our sterile bags are covered by our sterile guarantee, so in the unlikely event that your unused bag contaminates within 30 days of receiving it, please contact us for a replacement.

Deliveries & Returns

Delivery:

We aim to dispatch all in-stock orders placed before 3pm Monday-Friday the same day (exclusions apply).

We ship most orders using the DPD Next Day service, so in most cases, you can expect to receive it the next day (if ordered before the cutoff).

For more info on dispatch times, services and delivery costs, check out our delivery page.

Returns:

Although unlikely, If for any reason your order arrives damaged, contaminated or not as expected, just contact us and we'll make it right.

Please note, we cannot accept liability for any used/opened sterile items, check out our returns policy for more info.

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Using Your Sterile Substrate

Full Instructions
  • mushroom grow bag illustration with a spawn bag being added into a substrate bag

    Add Mushroom Spawn

  • mushroom grow bag illustration with a warning to keep in the correct temperature and sunlight conditions

    Watch Mycelium Grow

  • mushroom grow bag illustration with mycelium growing from the bag and a warning to keep in the correct temperature and sunlight conditions

    Set Fruiting Conditions

  • illustration of mushrooms growing out of a mushroom grow bag

    Harvest Fresh Mushrooms

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Full Instructions

How Our Bulk Substrate Bags Are Made:

  • a pile of cvg substrate for mushroom growing

    Blended & Hydrated

    Our bulk substrate recipes are blended and hydrated to optimal field capacity, then placed into premium Unicorn filter patch bags.

  • 10 x 3kg CVG mushroom substrate blocks in XLS-B Unicorn bags

    Steam Sterilised

    Once bagged and folded, our substrate bags are sterilised inside our medical grade autoclave using high temperature steam to kill off all contaminants.

  • cleanroom HEPA filter fan blowing clean air

    Cleanroom Sealed

    After sterilisation, substrate bags are placed into our cleanroom to cool down before being sealed shut with our impulse heat sealer.

  • spore supplies magic myc customer service logo

    Quality Monitored

    When a sterile substrate bag leaves the cleanroom, its quality is monitored to ensure sterility, ready for safe inoculation with genetics.

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Liquid Cultures

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More Resources:

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  • How to Use Substrate: The Grain to Substrate Transfer

    The Grain To Substrate Transfer

    Wondering what to do with your grain spawn now its ready? Here's a little refresher on making the 'spawn to substrate' inoculation process go smoothly. Keep reading to run through...

    The Grain To Substrate Transfer

    Wondering what to do with your grain spawn now its ready? Here's a little refresher on making the 'spawn to substrate' inoculation process go smoothly. Keep reading to run through...

  • How to use sterile grain for mushroom growing

    The Spore To Grain Transfer

    Sterilised grain bag ready, but unsure what to do with it? Not to worry, this guide will take you step by step through a our process for inoculating sterile grain....

    The Spore To Grain Transfer

    Sterilised grain bag ready, but unsure what to do with it? Not to worry, this guide will take you step by step through a our process for inoculating sterile grain....

  • Mould or Mycelium? A Mushroom Growers Guide to Contamination

    Mould Or Mycelium?

    Keep reading to learn about mushroom contamination, how to identify it, what to do when you find it and how to minimise contamination when growing mushrooms.

    Mould Or Mycelium?

    Keep reading to learn about mushroom contamination, how to identify it, what to do when you find it and how to minimise contamination when growing mushrooms.

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