Skip to content

FREE Delivery On Orders Over £30

30 Day Money Back Guarantee

Any Questions? support@williamscosupplies.com

Pay With Klarna & Crypto

  • Home
  • Best Sellers
  • Sterile Grain
  • Grow Kits
  • Sterile Substrate
  • Lab Supplies
  • Blog
  • Learn
    • First Time Mushroom Growing Guide
    • Full Mushroom Growing Guide
    • Contamination Guide
    • Terminology Guide
    • Substrate Selection Guide
  • Wholesale
  • Contact
Log in

Country/region

  • Afghanistan AFN ؋
  • Åland Islands EUR €
  • Albania ALL L
  • Algeria DZD د.ج
  • Andorra EUR €
  • Angola GBP £
  • Anguilla XCD $
  • Antigua & Barbuda XCD $
  • Argentina GBP £
  • Armenia AMD դր.
  • Aruba AWG ƒ
  • Ascension Island SHP £
  • Australia AUD $
  • Austria EUR €
  • Azerbaijan AZN ₼
  • Bahamas BSD $
  • Bahrain GBP £
  • Bangladesh BDT ৳
  • Barbados BBD $
  • Belarus GBP £
  • Belgium EUR €
  • Belize BZD $
  • Benin XOF Fr
  • Bermuda USD $
  • Bhutan GBP £
  • Bolivia BOB Bs.
  • Bosnia & Herzegovina BAM КМ
  • Botswana BWP P
  • Brazil GBP £
  • British Indian Ocean Territory USD $
  • British Virgin Islands USD $
  • Brunei BND $
  • Bulgaria BGN лв.
  • Burkina Faso XOF Fr
  • Burundi BIF Fr
  • Cambodia KHR ៛
  • Cameroon XAF CFA
  • Canada CAD $
  • Cape Verde CVE $
  • Caribbean Netherlands USD $
  • Cayman Islands KYD $
  • Central African Republic XAF CFA
  • Chad XAF CFA
  • Chile GBP £
  • China CNY ¥
  • Christmas Island AUD $
  • Cocos (Keeling) Islands AUD $
  • Colombia GBP £
  • Comoros KMF Fr
  • Congo - Brazzaville XAF CFA
  • Congo - Kinshasa CDF Fr
  • Cook Islands NZD $
  • Costa Rica CRC ₡
  • Côte d’Ivoire XOF Fr
  • Croatia EUR €
  • Curaçao ANG ƒ
  • Cyprus EUR €
  • Czechia CZK Kč
  • Denmark DKK kr.
  • Djibouti DJF Fdj
  • Dominica XCD $
  • Dominican Republic DOP $
  • Ecuador USD $
  • Egypt EGP ج.م
  • El Salvador USD $
  • Equatorial Guinea XAF CFA
  • Eritrea GBP £
  • Estonia EUR €
  • Eswatini GBP £
  • Ethiopia ETB Br
  • Falkland Islands FKP £
  • Faroe Islands DKK kr.
  • Fiji FJD $
  • Finland EUR €
  • France EUR €
  • French Guiana EUR €
  • French Polynesia XPF Fr
  • French Southern Territories EUR €
  • Gabon XOF Fr
  • Gambia GMD D
  • Georgia GBP £
  • Germany EUR €
  • Ghana GBP £
  • Gibraltar GBP £
  • Greece EUR €
  • Greenland DKK kr.
  • Grenada XCD $
  • Guadeloupe EUR €
  • Guatemala GTQ Q
  • Guernsey GBP £
  • Guinea GNF Fr
  • Guinea-Bissau XOF Fr
  • Guyana GYD $
  • Haiti GBP £
  • Honduras HNL L
  • Hong Kong SAR HKD $
  • Hungary HUF Ft
  • Iceland ISK kr
  • India INR ₹
  • Indonesia IDR Rp
  • Iraq GBP £
  • Ireland EUR €
  • Isle of Man GBP £
  • Israel ILS ₪
  • Italy EUR €
  • Jamaica JMD $
  • Japan JPY ¥
  • Jersey GBP £
  • Jordan GBP £
  • Kazakhstan KZT ₸
  • Kenya KES KSh
  • Kiribati GBP £
  • Kosovo EUR €
  • Kuwait GBP £
  • Kyrgyzstan KGS som
  • Laos LAK ₭
  • Latvia EUR €
  • Lebanon LBP ل.ل
  • Lesotho GBP £
  • Liberia GBP £
  • Libya GBP £
  • Liechtenstein CHF CHF
  • Lithuania EUR €
  • Luxembourg EUR €
  • Macao SAR MOP P
  • Madagascar GBP £
  • Malawi MWK MK
  • Malaysia MYR RM
  • Maldives MVR MVR
  • Mali XOF Fr
  • Malta EUR €
  • Martinique EUR €
  • Mauritania GBP £
  • Mauritius MUR ₨
  • Mayotte EUR €
  • Mexico GBP £
  • Moldova MDL L
  • Monaco EUR €
  • Mongolia MNT ₮
  • Montenegro EUR €
  • Montserrat XCD $
  • Morocco MAD د.م.
  • Mozambique GBP £
  • Myanmar (Burma) MMK K
  • Namibia GBP £
  • Nauru AUD $
  • Nepal NPR Rs.
  • Netherlands EUR €
  • New Caledonia XPF Fr
  • New Zealand NZD $
  • Nicaragua NIO C$
  • Niger XOF Fr
  • Nigeria NGN ₦
  • Niue NZD $
  • Norfolk Island AUD $
  • North Macedonia MKD ден
  • Norway GBP £
  • Oman GBP £
  • Pakistan PKR ₨
  • Palestinian Territories ILS ₪
  • Panama USD $
  • Papua New Guinea PGK K
  • Paraguay PYG ₲
  • Peru PEN S/
  • Philippines PHP ₱
  • Pitcairn Islands NZD $
  • Poland PLN zł
  • Portugal EUR €
  • Qatar QAR ر.ق
  • Réunion EUR €
  • Romania RON Lei
  • Russia GBP £
  • Rwanda RWF FRw
  • Samoa WST T
  • San Marino EUR €
  • São Tomé & Príncipe STD Db
  • Saudi Arabia SAR ر.س
  • Senegal XOF Fr
  • Serbia RSD РСД
  • Seychelles GBP £
  • Sierra Leone SLL Le
  • Singapore SGD $
  • Sint Maarten ANG ƒ
  • Slovakia EUR €
  • Slovenia EUR €
  • Solomon Islands SBD $
  • Somalia GBP £
  • South Africa GBP £
  • South Georgia & South Sandwich Islands GBP £
  • South Korea KRW ₩
  • South Sudan GBP £
  • Spain EUR €
  • Sri Lanka LKR ₨
  • St. Barthélemy EUR €
  • St. Helena SHP £
  • St. Kitts & Nevis XCD $
  • St. Lucia XCD $
  • St. Martin EUR €
  • St. Pierre & Miquelon EUR €
  • St. Vincent & Grenadines XCD $
  • Sudan GBP £
  • Suriname GBP £
  • Svalbard & Jan Mayen GBP £
  • Sweden SEK kr
  • Switzerland CHF CHF
  • Taiwan TWD $
  • Tajikistan TJS ЅМ
  • Tanzania TZS Sh
  • Thailand THB ฿
  • Timor-Leste USD $
  • Togo XOF Fr
  • Tokelau NZD $
  • Tonga TOP T$
  • Trinidad & Tobago TTD $
  • Tristan da Cunha GBP £
  • Tunisia GBP £
  • Türkiye GBP £
  • Turkmenistan GBP £
  • Turks & Caicos Islands USD $
  • Tuvalu AUD $
  • U.S. Outlying Islands USD $
  • Uganda UGX USh
  • Ukraine UAH ₴
  • United Arab Emirates AED د.إ
  • United Kingdom GBP £
  • United States USD $
  • Uruguay UYU $U
  • Uzbekistan UZS so'm
  • Vanuatu VUV Vt
  • Vatican City EUR €
  • Venezuela USD $
  • Vietnam VND ₫
  • Wallis & Futuna XPF Fr
  • Western Sahara MAD د.م.
  • Yemen YER ﷼
  • Zambia GBP £
  • Zimbabwe USD $

    Williams Co Supplies

    • Home
    • Best Sellers
    • Sterile Grain
    • Grow Kits
    • Sterile Substrate
    • Lab Supplies
    • Blog
    • Learn
      • First Time Mushroom Growing Guide
      • Full Mushroom Growing Guide
      • Contamination Guide
      • Terminology Guide
      • Substrate Selection Guide
    • Wholesale
    • Contact
    Log in Basket

    Item added to your basket

    View basket

    Mushroom Growing Supplies. UK Based.

    We're here to help make it as easy and enjoyable as possible for you to grow your own mushrooms at home. Mushroom supplies for beginners and professionals.

    Start Growing Mushrooms Today!Total Beginner? Start Here
    Skip to product information
    1 / of 3

    Williams Co Supplies

    2.5KG Substr8™ High Performance Mushroom Substrate - Mix with Grain Spawn | Premium 8-Ingredient Formula UK

    Regular price £34.99 GBP
    Regular price £49.99 GBP Sale price £34.99 GBP
    Unit price /  per 
    Sale Sold out
    Discounts & Shipping calculated at checkout.
     
     
    This item is a recurring or deferred purchase. By continuing, I agree to the cancellation policy and authorize you to charge my payment method at the prices, frequency and dates listed on this page until my order is fulfilled or I cancel, if permitted.
    Share
    View full details
    2.5KG Substr8™ High Performance Mushroom Substrate - Mix with Grain Spawn | Premium 8-Ingredient Formula UK 2.5KG Substr8™ High Performance Mushroom Substrate - Mix with Grain Spawn | Premium 8-Ingredient Formula UK 2.5KG Substr8™ High Performance Mushroom Substrate - Mix with Grain Spawn | Premium 8-Ingredient Formula UK

    Featured products

    • 1KG Sterile Organic Rye Grain 1KG Sterile Organic Rye Grain

      1KG Sterile Organic Rye Grain

      Sold out

      1KG Sterile Organic Rye Grain

      Regular price £9.99 GBP
      Regular price £12.99 GBP Sale price £9.99 GBP
      Unit price /  per 
      Sold out
    • 2KG All In One Mushroom Growing Kit - Complete Setup | Grain + Substrate Included UK 2KG All In One Mushroom Growing Kit - Complete Setup | Grain + Substrate Included UK

      2KG All In One Mushroom Growing Kit - Complete Setup | Grain + Substrate Included UK

      2KG All In One Mushroom Growing Kit - Complete Setup | Grain + Substrate Included UK

      Regular price £19.99 GBP
      Regular price Sale price £19.99 GBP
      Unit price /  per 
    • Sterile Pack Sterile Pack

      Sterile Pack

      Sterile Pack

      Regular price £1.49 GBP
      Regular price Sale price £1.49 GBP
      Unit price /  per 
    • 2KG Sterile Rye Grain Spawn - Large Scale Growing | Premium Mushroom Substrate UK 2KG Sterile Rye Grain Spawn - Large Scale Growing | Premium Mushroom Substrate UK

      2KG Sterile Rye Grain Spawn - Large Scale Growing | Premium Mushroom Substrate UK

      Sold out

      2KG Sterile Rye Grain Spawn - Large Scale Growing | Premium Mushroom Substrate UK

      Regular price £17.99 GBP
      Regular price Sale price £17.99 GBP
      Unit price /  per 
      Sold out
    • 3.5KG XXL All In One Mushroom Growing Kit - Maximum Yields | Serious Growers UK 3.5KG XXL All In One Mushroom Growing Kit - Maximum Yields | Serious Growers UK

      3.5KG XXL All In One Mushroom Growing Kit - Maximum Yields | Serious Growers UK

      3.5KG XXL All In One Mushroom Growing Kit - Maximum Yields | Serious Growers UK

      Regular price £29.99 GBP
      Regular price Sale price £29.99 GBP
      Unit price /  per 
    • Mycelial Growth Promoter

      Mycelial Growth Promoter™ 60ml

      Sale

      Mycelial Growth Promoter™ 60ml

      Regular price £14.99 GBP
      Regular price £19.99 GBP Sale price £14.99 GBP
      Unit price /  per 
      Sale
    • 70% Isopropyl Alcohol 50ml

      70% Isopropyl Alcohol

      70% Isopropyl Alcohol

      Regular price From £1.99 GBP
      Regular price Sale price From £1.99 GBP
      Unit price /  per 
    • Premium Manure Mushroom Substrate - Advanced Grower Formula | Maximum Yields for Experienced Cultivators UK 5LB / 2.2KG Pasteurised Manure Mushroom Bulk Substrate

      Premium Manure Mushroom Substrate - Advanced Grower Formula | Maximum Yields for Experienced Cultivators UK

      Premium Manure Mushroom Substrate - Advanced Grower Formula | Maximum Yields for Experienced Cultivators UK

      Regular price From £24.99 GBP
      Regular price Sale price From £24.99 GBP
      Unit price /  per 
    View all

    Collections

    • Best Sellers

      Discover our top-selling mushroom supplies, trusted by growers for quality and results....

      Best Sellers

    • Sterilised Grain

      UK's #1 Choice for Contamination-Free Growing ✅ Laboratory Tested ✅ 99% Success...

      Sterilised Grain

    • Grow Your Own Kits

      Grow Your Own Kits

      Complete Growing Solutions - Everything You Need in One Kit ✅ Beginner...

      Grow Your Own Kits

    • Premium Mushroom Substrates

      Professional Grade Substrates - Pasteurized & Ready to Use ✅ Perfect Field...

      Premium Mushroom Substrates

    • Mycology Lab Supplies

      Shop high-quality mycology lab supplies, offering everything you need for successful mushroom...

      Mycology Lab Supplies

    • Wholesale

      Wholesale

    Subscribe to our emails

    Country/region

    • Afghanistan AFN ؋
    • Åland Islands EUR €
    • Albania ALL L
    • Algeria DZD د.ج
    • Andorra EUR €
    • Angola GBP £
    • Anguilla XCD $
    • Antigua & Barbuda XCD $
    • Argentina GBP £
    • Armenia AMD դր.
    • Aruba AWG ƒ
    • Ascension Island SHP £
    • Australia AUD $
    • Austria EUR €
    • Azerbaijan AZN ₼
    • Bahamas BSD $
    • Bahrain GBP £
    • Bangladesh BDT ৳
    • Barbados BBD $
    • Belarus GBP £
    • Belgium EUR €
    • Belize BZD $
    • Benin XOF Fr
    • Bermuda USD $
    • Bhutan GBP £
    • Bolivia BOB Bs.
    • Bosnia & Herzegovina BAM КМ
    • Botswana BWP P
    • Brazil GBP £
    • British Indian Ocean Territory USD $
    • British Virgin Islands USD $
    • Brunei BND $
    • Bulgaria BGN лв.
    • Burkina Faso XOF Fr
    • Burundi BIF Fr
    • Cambodia KHR ៛
    • Cameroon XAF CFA
    • Canada CAD $
    • Cape Verde CVE $
    • Caribbean Netherlands USD $
    • Cayman Islands KYD $
    • Central African Republic XAF CFA
    • Chad XAF CFA
    • Chile GBP £
    • China CNY ¥
    • Christmas Island AUD $
    • Cocos (Keeling) Islands AUD $
    • Colombia GBP £
    • Comoros KMF Fr
    • Congo - Brazzaville XAF CFA
    • Congo - Kinshasa CDF Fr
    • Cook Islands NZD $
    • Costa Rica CRC ₡
    • Côte d’Ivoire XOF Fr
    • Croatia EUR €
    • Curaçao ANG ƒ
    • Cyprus EUR €
    • Czechia CZK Kč
    • Denmark DKK kr.
    • Djibouti DJF Fdj
    • Dominica XCD $
    • Dominican Republic DOP $
    • Ecuador USD $
    • Egypt EGP ج.م
    • El Salvador USD $
    • Equatorial Guinea XAF CFA
    • Eritrea GBP £
    • Estonia EUR €
    • Eswatini GBP £
    • Ethiopia ETB Br
    • Falkland Islands FKP £
    • Faroe Islands DKK kr.
    • Fiji FJD $
    • Finland EUR €
    • France EUR €
    • French Guiana EUR €
    • French Polynesia XPF Fr
    • French Southern Territories EUR €
    • Gabon XOF Fr
    • Gambia GMD D
    • Georgia GBP £
    • Germany EUR €
    • Ghana GBP £
    • Gibraltar GBP £
    • Greece EUR €
    • Greenland DKK kr.
    • Grenada XCD $
    • Guadeloupe EUR €
    • Guatemala GTQ Q
    • Guernsey GBP £
    • Guinea GNF Fr
    • Guinea-Bissau XOF Fr
    • Guyana GYD $
    • Haiti GBP £
    • Honduras HNL L
    • Hong Kong SAR HKD $
    • Hungary HUF Ft
    • Iceland ISK kr
    • India INR ₹
    • Indonesia IDR Rp
    • Iraq GBP £
    • Ireland EUR €
    • Isle of Man GBP £
    • Israel ILS ₪
    • Italy EUR €
    • Jamaica JMD $
    • Japan JPY ¥
    • Jersey GBP £
    • Jordan GBP £
    • Kazakhstan KZT ₸
    • Kenya KES KSh
    • Kiribati GBP £
    • Kosovo EUR €
    • Kuwait GBP £
    • Kyrgyzstan KGS som
    • Laos LAK ₭
    • Latvia EUR €
    • Lebanon LBP ل.ل
    • Lesotho GBP £
    • Liberia GBP £
    • Libya GBP £
    • Liechtenstein CHF CHF
    • Lithuania EUR €
    • Luxembourg EUR €
    • Macao SAR MOP P
    • Madagascar GBP £
    • Malawi MWK MK
    • Malaysia MYR RM
    • Maldives MVR MVR
    • Mali XOF Fr
    • Malta EUR €
    • Martinique EUR €
    • Mauritania GBP £
    • Mauritius MUR ₨
    • Mayotte EUR €
    • Mexico GBP £
    • Moldova MDL L
    • Monaco EUR €
    • Mongolia MNT ₮
    • Montenegro EUR €
    • Montserrat XCD $
    • Morocco MAD د.م.
    • Mozambique GBP £
    • Myanmar (Burma) MMK K
    • Namibia GBP £
    • Nauru AUD $
    • Nepal NPR Rs.
    • Netherlands EUR €
    • New Caledonia XPF Fr
    • New Zealand NZD $
    • Nicaragua NIO C$
    • Niger XOF Fr
    • Nigeria NGN ₦
    • Niue NZD $
    • Norfolk Island AUD $
    • North Macedonia MKD ден
    • Norway GBP £
    • Oman GBP £
    • Pakistan PKR ₨
    • Palestinian Territories ILS ₪
    • Panama USD $
    • Papua New Guinea PGK K
    • Paraguay PYG ₲
    • Peru PEN S/
    • Philippines PHP ₱
    • Pitcairn Islands NZD $
    • Poland PLN zł
    • Portugal EUR €
    • Qatar QAR ر.ق
    • Réunion EUR €
    • Romania RON Lei
    • Russia GBP £
    • Rwanda RWF FRw
    • Samoa WST T
    • San Marino EUR €
    • São Tomé & Príncipe STD Db
    • Saudi Arabia SAR ر.س
    • Senegal XOF Fr
    • Serbia RSD РСД
    • Seychelles GBP £
    • Sierra Leone SLL Le
    • Singapore SGD $
    • Sint Maarten ANG ƒ
    • Slovakia EUR €
    • Slovenia EUR €
    • Solomon Islands SBD $
    • Somalia GBP £
    • South Africa GBP £
    • South Georgia & South Sandwich Islands GBP £
    • South Korea KRW ₩
    • South Sudan GBP £
    • Spain EUR €
    • Sri Lanka LKR ₨
    • St. Barthélemy EUR €
    • St. Helena SHP £
    • St. Kitts & Nevis XCD $
    • St. Lucia XCD $
    • St. Martin EUR €
    • St. Pierre & Miquelon EUR €
    • St. Vincent & Grenadines XCD $
    • Sudan GBP £
    • Suriname GBP £
    • Svalbard & Jan Mayen GBP £
    • Sweden SEK kr
    • Switzerland CHF CHF
    • Taiwan TWD $
    • Tajikistan TJS ЅМ
    • Tanzania TZS Sh
    • Thailand THB ฿
    • Timor-Leste USD $
    • Togo XOF Fr
    • Tokelau NZD $
    • Tonga TOP T$
    • Trinidad & Tobago TTD $
    • Tristan da Cunha GBP £
    • Tunisia GBP £
    • Türkiye GBP £
    • Turkmenistan GBP £
    • Turks & Caicos Islands USD $
    • Tuvalu AUD $
    • U.S. Outlying Islands USD $
    • Uganda UGX USh
    • Ukraine UAH ₴
    • United Arab Emirates AED د.إ
    • United Kingdom GBP £
    • United States USD $
    • Uruguay UYU $U
    • Uzbekistan UZS so'm
    • Vanuatu VUV Vt
    • Vatican City EUR €
    • Venezuela USD $
    • Vietnam VND ₫
    • Wallis & Futuna XPF Fr
    • Western Sahara MAD د.م.
    • Yemen YER ﷼
    • Zambia GBP £
    • Zimbabwe USD $
    Payment methods
    • American Express
    • Apple Pay
    • Diners Club
    • Discover
    • Google Pay
    • Klarna
    • Maestro
    • Mastercard
    • PayPal
    • Shop Pay
    • Visa
    © 2025, Williams Co Supplies Powered by Shopify
    • Refund policy
    • Privacy policy
    • Terms of service
    • Shipping policy
    • Choosing a selection results in a full page refresh.
    • Opens in a new window.