Sterile Substrate | Williams Co Supplies
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Collection: Sterile Substrate

Discover our range of ready-to-use bulk mushroom substrates, designed to simplify the spawn to bulk process. Just open the heat-sealed bag and mix with your colonised grains for effortless mushroom cultivation. Perfect for growers of all levels, our bulk substrates ensure an easy and productive growing experience.

10 products
  • Substr8™ High Performance Substrate For Exotic Mushrooms & Therapeutic Species
    Regular price
    from £49.99
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    from £49.99
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  • 2.5KG Coco Coir CVG Fruiting Substrate For Exotic Mushrooms & Therapeutic Species
    Pasteurised Coco Coir Mushroom Bulk Substrate
    Regular price
    £24.99
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    £24.99
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  • 5LB / 2.2KG Pasteurised Manure Mushroom Bulk Substrate
    5LB / 2.2KG Pasteurised Manure Mushroom Bulk Substrate
    Regular price
    £24.99
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    £24.99
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  • Mycelial Growth Promoter™ 60ml
    Mycelial Growth Promoter
    Regular price
    £14.99
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    £14.99
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    £14.99
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  • Exotyc™ Zoo Manure Mushroom Substrate
    Regular price
    from £39.99
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    from £39.99
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  • 5LB / 2.2KG Sterilised Masters Mix Substrate | Mushroom Fruiting Block
    5LB / 2.2KG Sterilised Masters Mix Substrate | Fruiting Block
    Regular price
    £24.99
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    £24.99
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  • 5LB / 2.2KG Sterilised Supplemented Hardwood Substrate | Mushroom Fruiting Block
    5LB / 2.2KG Sterilised Supplemented Hardwood Substrate | Fruiting Block
    Regular price
    £24.99
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    £24.99
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  • 5LB / 2.2KG Sterilised Master Straw Mix Substrate | Mushroom Fruiting Block
    5LB / 2.2KG Sterilised Master Straw Mix Substrate | Fruiting Block
    Regular price
    £24.99
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    £24.99
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  • Substr8™ Inject & Forget Growing Kit For Exotic Mushroom & Therapeutic Species | 1KG
    Regular price
    £19.99
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    £19.99
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    £29.99
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  • Coco Coir CVG Fruiting Substrate For Exotic Mushrooms & Therapeutic Species | HUGE SAVINGS
    Regular price
    from £84.99
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    from £84.99
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