{"product_id":"1kg-sterile-masters-mix-mushroom-substrate","title":"1kg Sterile Master’s Mix Mushroom Substrate, Ready to Inoculate","description":"\u003cp data-start=\"139\" data-end=\"373\"\u003e\u003cstrong data-start=\"139\" data-end=\"186\"\u003e1kg Sterile Master’s Mix Mushroom Substrate\u003c\/strong\u003e is a professional grade mushroom growing medium made from a \u003cstrong data-start=\"247\" data-end=\"296\"\u003e50\/50 blend of hardwood pellets and soy hulls\u003c\/strong\u003e, fully hydrated, pressure sterilised, and sealed in a filter patch grow bag.\u003c\/p\u003e\n\u003cp data-start=\"375\" data-end=\"684\"\u003eMaster’s Mix is one of the most popular substrates used by gourmet mushroom growers because it provides a rich, balanced food source that supports fast colonisation, strong mycelium growth, and reliable yields. This 1kg format is ideal for home growers, hobby cultivators, and small scale mushroom production.\u003c\/p\u003e\n\u003cp data-start=\"686\" data-end=\"829\"\u003eEach bag is prepared in small batches with consistency and sterility as the priority, so it arrives ready to inoculate straight out of the box.\u003c\/p\u003e\n\u003ch2 data-section-id=\"1bb5x9v\" data-start=\"831\" data-end=\"861\"\u003e🔥 Why Choose Master’s Mix?\u003c\/h2\u003e\n\u003cp data-start=\"863\" data-end=\"973\"\u003e\u003cstrong data-start=\"863\" data-end=\"904\"\u003eProfessional grade mushroom substrate\u003c\/strong\u003e\u003cbr data-start=\"904\" data-end=\"907\"\u003eMade using a proven 50\/50 blend of hardwood pellets and soy hulls.\u003c\/p\u003e\n\u003cp data-start=\"975\" data-end=\"1134\"\u003e\u003cstrong data-start=\"975\" data-end=\"1012\"\u003eFully sterilised and ready to use\u003c\/strong\u003e\u003cbr data-start=\"1012\" data-end=\"1015\"\u003eHydrated, pressure sterilised, and sealed in a filter patch grow bag, with no soaking, mixing, or sterilising required.\u003c\/p\u003e\n\u003cp data-start=\"1136\" data-end=\"1271\"\u003e\u003cstrong data-start=\"1136\" data-end=\"1175\"\u003eRich nitrogen source from soy hulls\u003c\/strong\u003e\u003cbr data-start=\"1175\" data-end=\"1178\"\u003eSoy hulls provide additional nutrition to support vigorous mycelium growth and strong yields.\u003c\/p\u003e\n\u003cp data-start=\"1273\" data-end=\"1424\"\u003e\u003cstrong data-start=\"1273\" data-end=\"1301\"\u003eHardwood based structure\u003c\/strong\u003e\u003cbr data-start=\"1301\" data-end=\"1304\"\u003eHardwood pellets provide structure, moisture retention, and a long lasting food source for wood loving mushroom species.\u003c\/p\u003e\n\u003cp data-start=\"1426\" data-end=\"1559\"\u003e\u003cstrong data-start=\"1426\" data-end=\"1447\"\u003eFast colonisation\u003c\/strong\u003e\u003cbr data-start=\"1447\" data-end=\"1450\"\u003eThe balanced 50\/50 formula helps many gourmet mushrooms colonise faster compared with plain sawdust or straw.\u003c\/p\u003e\n\u003cp data-start=\"1561\" data-end=\"1690\"\u003e\u003cstrong data-start=\"1561\" data-end=\"1585\"\u003eIdeal 1kg block size\u003c\/strong\u003e\u003cbr data-start=\"1585\" data-end=\"1588\"\u003eEasy to handle, simple to inoculate, and practical for smaller growing spaces or testing new cultures.\u003c\/p\u003e\n\u003cp data-start=\"1692\" data-end=\"1816\"\u003e\u003cstrong data-start=\"1692\" data-end=\"1714\"\u003eTrusted by growers\u003c\/strong\u003e\u003cbr data-start=\"1714\" data-end=\"1717\"\u003eMaster’s Mix is widely used by experienced growers and small scale commercial mushroom cultivators.\u003c\/p\u003e\n\u003ch2 data-section-id=\"jbla7u\" data-start=\"1818\" data-end=\"1854\"\u003e🧪 Prepared in Our UK Sterile Lab\u003c\/h2\u003e\n\u003cp data-start=\"1856\" data-end=\"2103\"\u003eAll \u003cstrong data-start=\"1860\" data-end=\"1903\"\u003e1kg sterile Master’s Mix substrate bags\u003c\/strong\u003e are prepared in small batches in our UK sterile lab. Each bag is fully hydrated, pressure sterilised, and sealed in a filter patch grow bag to create a clean and reliable mushroom fruiting substrate.\u003c\/p\u003e\n\u003cp data-start=\"2105\" data-end=\"2280\"\u003eBecause Master’s Mix is nutrient dense, proper sterilisation is essential. This has already been done for you, making the process easier and helping reduce contamination risk.\u003c\/p\u003e\n\u003ch2 data-section-id=\"mnqcrk\" data-start=\"2282\" data-end=\"2313\"\u003e🧬 Suitable Mushroom Species\u003c\/h2\u003e\n\u003cp data-start=\"2315\" data-end=\"2447\"\u003eThis substrate is best suited to gourmet and functional mushroom species that thrive on supplemented hardwood substrates, including:\u003c\/p\u003e\n\u003cp data-start=\"2449\" data-end=\"2580\"\u003e\u003cstrong data-start=\"2449\" data-end=\"2469\"\u003eOyster mushrooms\u003c\/strong\u003e\u003cbr data-start=\"2469\" data-end=\"2472\"\u003eSuitable for Pink Oyster, Blue Oyster, Grey Oyster, Phoenix Oyster, King Oyster, and other Oyster varieties.\u003c\/p\u003e\n\u003cp data-start=\"2582\" data-end=\"2694\"\u003e\u003cstrong data-start=\"2582\" data-end=\"2597\"\u003eLion’s Mane\u003c\/strong\u003e\u003cbr data-start=\"2597\" data-end=\"2600\"\u003eA popular choice for Lion’s Mane mushroom growing due to the rich hardwood and soy hull blend.\u003c\/p\u003e\n\u003cp data-start=\"2696\" data-end=\"2781\"\u003e\u003cstrong data-start=\"2696\" data-end=\"2718\"\u003eChestnut mushrooms\u003c\/strong\u003e\u003cbr data-start=\"2718\" data-end=\"2721\"\u003eA strong substrate option for Chestnut mushroom cultivation.\u003c\/p\u003e\n\u003cp data-start=\"2783\" data-end=\"2872\"\u003e\u003cstrong data-start=\"2783\" data-end=\"2805\"\u003ePioppino mushrooms\u003c\/strong\u003e\u003cbr data-start=\"2805\" data-end=\"2808\"\u003eSuitable for Pioppino and other hardwood loving gourmet species.\u003c\/p\u003e\n\u003cp data-start=\"2874\" data-end=\"2972\"\u003e\u003cstrong data-start=\"2874\" data-end=\"2894\"\u003eReishi mushrooms\u003c\/strong\u003e\u003cbr data-start=\"2894\" data-end=\"2897\"\u003eCan be used for Reishi and other functional wood loving mushroom varieties.\u003c\/p\u003e\n\u003cp data-start=\"2974\" data-end=\"3117\"\u003e\u003cstrong data-start=\"2974\" data-end=\"3012\"\u003eMany other hardwood loving species\u003c\/strong\u003e\u003cbr data-start=\"3012\" data-end=\"3015\"\u003eBest suited to mushroom species that naturally perform well on supplemented hardwood based substrates.\u003c\/p\u003e\n\u003ch2 data-section-id=\"101sl6h\" data-start=\"3119\" data-end=\"3141\"\u003e📦 What’s Included?\u003c\/h2\u003e\n\u003cp data-start=\"3143\" data-end=\"3259\"\u003e\u003cstrong data-start=\"3143\" data-end=\"3198\"\u003e1 x 1kg Sterile Master’s Mix Mushroom Substrate Bag\u003c\/strong\u003e\u003cbr data-start=\"3198\" data-end=\"3201\"\u003eMade from a 50\/50 blend of hardwood pellets and soy hulls.\u003c\/p\u003e\n\u003cp data-start=\"3261\" data-end=\"3356\"\u003e\u003cstrong data-start=\"3261\" data-end=\"3289\"\u003eFully hydrated substrate\u003c\/strong\u003e\u003cbr data-start=\"3289\" data-end=\"3292\"\u003ePrepared to the correct moisture level for mushroom cultivation.\u003c\/p\u003e\n\u003cp data-start=\"3358\" data-end=\"3456\"\u003e\u003cstrong data-start=\"3358\" data-end=\"3392\"\u003ePressure sterilised and sealed\u003c\/strong\u003e\u003cbr data-start=\"3392\" data-end=\"3395\"\u003eSterilised in a filter patch grow bag for clean colonisation.\u003c\/p\u003e\n\u003cp data-start=\"3458\" data-end=\"3541\"\u003e\u003cstrong data-start=\"3458\" data-end=\"3487\"\u003eSterile IPA wipe included\u003c\/strong\u003e\u003cbr data-start=\"3487\" data-end=\"3490\"\u003eUse to clean the injection area before inoculation.\u003c\/p\u003e\n\u003cp data-start=\"3543\" data-end=\"3627\"\u003e\u003cstrong data-start=\"3543\" data-end=\"3573\"\u003eMicropore sticker included\u003c\/strong\u003e\u003cbr data-start=\"3573\" data-end=\"3576\"\u003eUse to cover the injection point after inoculation.\u003c\/p\u003e\n\u003ch2 data-section-id=\"ad16gp\" data-start=\"3629\" data-end=\"3645\"\u003e🧪 How to Use\u003c\/h2\u003e\n\u003cp data-start=\"3647\" data-end=\"3759\"\u003e\u003cstrong data-start=\"3647\" data-end=\"3683\"\u003eStep 1, Clean the injection area\u003c\/strong\u003e\u003cbr data-start=\"3683\" data-end=\"3686\"\u003eUse the included sterile IPA wipe to clean the injection area before use.\u003c\/p\u003e\n\u003cp data-start=\"3761\" data-end=\"3963\"\u003e\u003cstrong data-start=\"3761\" data-end=\"3796\"\u003eStep 2, Inoculate the substrate\u003c\/strong\u003e\u003cbr data-start=\"3796\" data-end=\"3799\"\u003eInoculate with fully colonised grain spawn for best results. Liquid culture can also be used, but colonisation may be slower and requires careful sterile technique.\u003c\/p\u003e\n\u003cp data-start=\"3965\" data-end=\"4067\"\u003e\u003cstrong data-start=\"3965\" data-end=\"4001\"\u003eStep 3, Seal the injection point\u003c\/strong\u003e\u003cbr data-start=\"4001\" data-end=\"4004\"\u003eCover the injection point using the included micropore sticker.\u003c\/p\u003e\n\u003cp data-start=\"4069\" data-end=\"4275\"\u003e\u003cstrong data-start=\"4069\" data-end=\"4097\"\u003eStep 4, Incubate the bag\u003c\/strong\u003e\u003cbr data-start=\"4097\" data-end=\"4100\"\u003ePlace the bag in a clean, warm space out of direct sunlight. A general incubation range for many gourmet mushrooms is around \u003cstrong data-start=\"4225\" data-end=\"4239\"\u003e20 to 24°C\u003c\/strong\u003e, depending on the species selected.\u003c\/p\u003e\n\u003cp data-start=\"4277\" data-end=\"4424\"\u003e\u003cstrong data-start=\"4277\" data-end=\"4312\"\u003eStep 5, Allow full colonisation\u003c\/strong\u003e\u003cbr data-start=\"4312\" data-end=\"4315\"\u003eWait until the block is fully colonised, bright white, and consolidated before moving to fruiting conditions.\u003c\/p\u003e\n\u003cp data-start=\"4426\" data-end=\"4572\"\u003e\u003cstrong data-start=\"4426\" data-end=\"4452\"\u003eStep 6, Start fruiting\u003c\/strong\u003e\u003cbr data-start=\"4452\" data-end=\"4455\"\u003eOnce fully colonised, cut the bag and move it into suitable fruiting conditions for the mushroom species being grown.\u003c\/p\u003e\n\u003ch2 data-section-id=\"1yyu8tq\" data-start=\"4574\" data-end=\"4608\"\u003e✅ Why the 1kg Size Is Practical\u003c\/h2\u003e\n\u003cp data-start=\"4610\" data-end=\"4709\"\u003e\u003cstrong data-start=\"4610\" data-end=\"4642\"\u003eEasy to handle and inoculate\u003c\/strong\u003e\u003cbr data-start=\"4642\" data-end=\"4645\"\u003eA manageable size for home growers and small cultivation setups.\u003c\/p\u003e\n\u003cp data-start=\"4711\" data-end=\"4813\"\u003e\u003cstrong data-start=\"4711\" data-end=\"4745\"\u003eFaster, more even colonisation\u003c\/strong\u003e\u003cbr data-start=\"4745\" data-end=\"4748\"\u003eSmaller blocks often colonise more consistently than larger bags.\u003c\/p\u003e\n\u003cp data-start=\"4815\" data-end=\"4903\"\u003e\u003cstrong data-start=\"4815\" data-end=\"4837\"\u003eLower risk per bag\u003c\/strong\u003e\u003cbr data-start=\"4837\" data-end=\"4840\"\u003eUseful if testing new cultures or running multiple small grows.\u003c\/p\u003e\n\u003cp data-start=\"4905\" data-end=\"5008\"\u003e\u003cstrong data-start=\"4905\" data-end=\"4933\"\u003eGreat for limited spaces\u003c\/strong\u003e\u003cbr data-start=\"4933\" data-end=\"4936\"\u003eIdeal for shelves, tubs, small grow tents, or countertop growing setups.\u003c\/p\u003e\n\u003cp data-start=\"5010\" data-end=\"5132\"\u003e\u003cstrong data-start=\"5010\" data-end=\"5046\"\u003ePerfect for staggered production\u003c\/strong\u003e\u003cbr data-start=\"5046\" data-end=\"5049\"\u003eRun multiple 1kg blocks at different stages for a more consistent harvest schedule.\u003c\/p\u003e\n\u003ch2 data-section-id=\"c2zqdr\" data-start=\"5134\" data-end=\"5155\"\u003e⚠️ Important Notes\u003c\/h2\u003e\n\u003cp data-start=\"5157\" data-end=\"5386\"\u003e\u003cstrong data-start=\"5157\" data-end=\"5197\"\u003eBest used with colonised grain spawn\u003c\/strong\u003e\u003cbr data-start=\"5197\" data-end=\"5200\"\u003eFor strongest results, Master’s Mix is usually inoculated with fully colonised grain spawn. Liquid culture may be used by experienced growers, but grain spawn is generally more reliable.\u003c\/p\u003e\n\u003cp data-start=\"5388\" data-end=\"5558\"\u003e\u003cstrong data-start=\"5388\" data-end=\"5417\"\u003eSpecies selection matters\u003c\/strong\u003e\u003cbr data-start=\"5417\" data-end=\"5420\"\u003eDifferent mushrooms require different incubation and fruiting conditions. Always follow guidance for the specific culture you are growing.\u003c\/p\u003e\n\u003cp data-start=\"5560\" data-end=\"5708\"\u003e\u003cstrong data-start=\"5560\" data-end=\"5583\"\u003eUse clean technique\u003c\/strong\u003e\u003cbr data-start=\"5583\" data-end=\"5586\"\u003eAlthough the substrate is supplied sterile, contamination can still occur during inoculation. Work as cleanly as possible.\u003c\/p\u003e\n\u003cp data-start=\"5710\" data-end=\"5783\"\u003e\u003cstrong data-start=\"5710\" data-end=\"5749\"\u003eStore unopened in a cool, dry place\u003c\/strong\u003e\u003cbr data-start=\"5749\" data-end=\"5752\"\u003eKeep sealed until ready to use.\u003c\/p\u003e\n\u003cp data-start=\"5785\" data-end=\"5871\"\u003e\u003cstrong data-start=\"5785\" data-end=\"5814\"\u003eBest used within 3 months\u003c\/strong\u003e\u003cbr data-start=\"5814\" data-end=\"5817\"\u003eFor best results, use within \u003cstrong data-start=\"5846\" data-end=\"5870\"\u003e3 months of purchase\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch2 data-section-id=\"eagghp\" data-start=\"5873\" data-end=\"5899\"\u003e🛡️ Sterility Guarantee\u003c\/h2\u003e\n\u003cp data-start=\"5901\" data-end=\"6043\"\u003eIf your \u003cstrong data-start=\"5909\" data-end=\"5960\"\u003e1kg Sterile Master’s Mix Mushroom Substrate Bag\u003c\/strong\u003e arrives contaminated or compromised before use, we will replace it free of charge.\u003c\/p\u003e\n\u003ch2 data-section-id=\"1w62oxs\" data-start=\"6045\" data-end=\"6067\"\u003e🚚 Fast UK Delivery\u003c\/h2\u003e\n\u003cp data-start=\"6069\" data-end=\"6210\"\u003eAll sterile Master’s Mix substrate bags are prepared and shipped from our UK sterile lab and typically arrive within \u003cstrong data-start=\"6186\" data-end=\"6209\"\u003e1 to 3 working days\u003c\/strong\u003e.\u003c\/p\u003e","brand":"The Mushroom Lab","offers":[{"title":"1kg","offer_id":52532042826075,"sku":null,"price":16.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7108\/7451\/files\/FREEUKSHIPPING_19.jpg?v=1770580571","url":"https:\/\/themushroomlab.co.uk\/products\/1kg-sterile-masters-mix-mushroom-substrate","provider":"The Mushroom Lab","version":"1.0","type":"link"}