{"product_id":"red-reishi-colonized-grain-spawn-5-lb","title":"Red Reishi Colonized Grain Spawn Bag 5 LB","description":"\u003cstyle\u003e.mgk-product-content .b { font-weight:600 !important; }\u003c\/style\u003e\n\u003cdiv class=\"mgk-product-content\"\u003e\n\u003cp\u003e\u003cspan class=\"b\"\u003eFully colonized Red Reishi (\u003cem\u003eGanoderma lucidum\u003c\/em\u003e) grain spawn, 5 LB\u003c\/span\u003e, grown on our millet-based grain blend in a filtered Unicorn 3T bag. Built on premium first-generation genetics and produced fresh at our Illinois lab — fully colonized before it ships and ready to break up and inoculate the moment it arrives. Red Reishi is the most iconic functional mushroom in cultivation — a lacquered, blood-red hardwood polypore valued for centuries in traditional wellness practices and rich in triterpenes (ganoderic acids) and beta-glucans. It's a tough, contamination-resistant colonizer that rewards patience with a genuinely striking harvest.\u003c\/p\u003e\n\u003cdiv class=\"mgk-callout mgk-callout-ships\"\u003e\n\u003cspan class=\"b\"\u003e✓ Made Fresh — Ships Same or Next Business Day\u003c\/span\u003e\u003cbr\u003eWe don't stockpile spawn on a shelf for months. Bags are produced on a rolling schedule and held fully colonized, then shipped fresh in insulated packaging. \u003c\/div\u003e\n\u003ch3\u003ePremium Genetics, Sourced Worldwide\u003c\/h3\u003e\n\u003cp\u003eStrong genetics are the difference between a reliable run and a disappointing one — so we built our library from the best sources we could find. Our Red Reishi spawn starts with our own in-house master culture collection at Myco Labs, refined over years of isolation work, and is expanded through a partnership with \u003cspan class=\"b\"\u003eone of the largest commercial culture suppliers in Canada\u003c\/span\u003e, along with select strains sourced from the \u003cspan class=\"b\"\u003eUK and Asia\u003c\/span\u003e. Every culture is held as first-generation commercial genetics and selected for vigorous, clean colonization and true-to-type fruiting. This is the genetic foundation serious cultivators build on.\u003c\/p\u003e\n\u003ch3\u003eWhat You'll Receive\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan class=\"b\"\u003e5 LB of fully colonized grain spawn\u003c\/span\u003e — premium first-gen Red Reishi (bags are filled generously and typically weigh in above 5 LB)\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"b\"\u003eMillet-based grain blend\u003c\/span\u003e — primarily white and red millet with a small amount of milo; the fine grain gives plenty of inoculation points for fast, even colonization\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"b\"\u003eUnicorn 3T bag\u003c\/span\u003e with a 0.22-micron filter patch for clean gas exchange\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"b\"\u003e3-mil construction\u003c\/span\u003e, sterilized in a 3-hour autoclave cycle\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"b\"\u003eLab-inspected\u003c\/span\u003e for contamination and produced fresh at Myco Labs (Illinois, USA)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHow to Use Your Grain Spawn\u003c\/h3\u003e\n\u003cp\u003eThese bags are made to be broken up and mixed directly into sterilized bulk substrate. Reishi is a hardwood specialist, so supplemented sawdust is the intended pairing:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan class=\"b\"\u003eMix into Master's Mix\u003c\/span\u003e — break up the colonized grain and combine it with our \u003ca href=\"https:\/\/www.midwestgrowkits.com\/products\/sterilized-masters-mix-bag-5-lbs\"\u003e5 LB Sterilized Master's Mix\u003c\/a\u003e. One 5 LB bag inoculates 12–13 Master's Mix bags. Step-by-step walkthrough here: \u003ca href=\"https:\/\/www.midwestgrowkits.com\/blogs\/blog-1-growing-101-more\/how-to-use-grain-spawn-with-master-s-mix-substrate\"\u003eHow to Use Grain Spawn with Master's Mix Substrate\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"b\"\u003eExpand to more grain\u003c\/span\u003e — use a portion to inoculate additional sterilized grain (a grain-to-grain transfer) and multiply your spawn before spawning to bulk\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"b\"\u003eInoculate hardwood logs or totems\u003c\/span\u003e — Reishi performs well on oak, maple, and other dense hardwoods for outdoor and long-cycle grows\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor grain-to-grain transfers or any open work, do it in front of a \u003ca href=\"https:\/\/www.midwestgrowkits.com\/collections\/flow-hoods-clean-room\"\u003elaminar flow hood or clean-room setup\u003c\/a\u003e. A few minutes under HEPA-filtered air keeps contamination out and dramatically improves your success rate — especially when you're expanding spawn rather than going straight to a sealed Master's Mix bag.\u003c\/p\u003e\n\u003ca style=\"display: block; margin: 24px 0; text-align: center;\" href=\"https:\/\/www.midwestgrowkits.com\/blogs\/blog-1-growing-101-more\/how-to-use-grain-spawn-with-master-s-mix-substrate\"\u003e \u003cimg loading=\"lazy\" style=\"max-width: 100%; height: auto; border-radius: 6px;\" alt=\"How to use colonized grain spawn with Master's Mix - step-by-step guide\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0712\/0679\/7461\/files\/How_to_use_Grain_Spawn_Link_final.jpg?v=1781605812\"\u003e \u003c\/a\u003e\n\u003ch3\u003eRed Reishi Growing Characteristics\u003c\/h3\u003e\n\u003ctable class=\"mgk-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"b\"\u003eLatin name\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cem\u003eGanoderma lucidum\u003c\/em\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"b\"\u003eMycelium appearance\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eDense white growth that develops amber metabolite droplets and reddish-brown pigment as it matures — normal, not contamination\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"b\"\u003eSpawn-to-substrate ratio\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e~1 part spawn to 3 parts substrate (one 5 LB bag → 12–13 Master's Mix bags)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"b\"\u003ePreferred substrate\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eMaster's Mix, supplemented hardwood sawdust, hardwood logs and totems\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"b\"\u003eColonization temperature\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e75–85°F — Reishi likes it warmer than most gourmet species\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"b\"\u003eFruiting temperature\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e70–85°F at 85–95% humidity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"b\"\u003eFruiting form\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eHigh CO₂ and low airflow produce antler form; heavy fresh air exchange produces the classic flat lacquered conk\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"b\"\u003eDifficulty\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eEasy to colonize and highly contamination-resistant; intermediate to fruit due to the long cycle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"b\"\u003eUse category\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eFunctional (traditional wellness use; triterpenes, ganoderic acids, beta-glucans)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eGrain Spawn Specifications\u003c\/h3\u003e\n\u003ctable class=\"mgk-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"b\"\u003eNet weight\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e5 LB advertised (typically fills to ~5.5 LB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"b\"\u003eGrain\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003ePrimarily white and red millet with a small amount of milo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"b\"\u003eBag\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eUnicorn 3T, 3-mil, 0.22-micron filter patch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"b\"\u003eInjection port\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"b\"\u003eSterilization\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e3-hour autoclave cycle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"b\"\u003eSterility\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eProduced under HEPA-filtered laminar flow\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"b\"\u003eShelf life\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e90 days best \/ 120 days refrigerated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eSterility \u0026amp; Quality Standards\u003c\/h3\u003e\n\u003cp\u003eEvery bag is produced and inspected at Myco Labs under HEPA-filtered laminar flow, then incubated in a dedicated clean room until fully colonized. Each bag is visually inspected for contamination before it's approved for shipment. If it doesn't look right, it doesn't ship.\u003c\/p\u003e\n\u003ch3\u003eShipping \u0026amp; Handling\u003c\/h3\u003e\n\u003cp\u003eSpawn ships in padded packaging. In summer months (May–September) or to hot-climate destinations, we include a cold pack at no additional cost. Use your spawn promptly for best results; an unopened bag stays at peak viability for about 90 days at room temperature, or up to 120 days refrigerated at 35–40°F. Refrigerate if you're not using it right away.\u003c\/p\u003e\n\u003ch3\u003eRecommended Companion Products\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/www.midwestgrowkits.com\/products\/sterilized-masters-mix-bag-5-lbs\"\u003eSterilized Master's Mix (5 LB)\u003c\/a\u003e — the intended pairing; one spawn bag inoculates 12–13\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/www.midwestgrowkits.com\/collections\/flow-hoods-clean-room\"\u003eLaminar Flow Hoods \u0026amp; Clean Room Equipment\u003c\/a\u003e — for contamination-free grain transfers\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/www.midwestgrowkits.com\/products\/red-reishi-liquid-culture-syringe-10cc\"\u003eRed Reishi Liquid Culture Syringe (10cc)\u003c\/a\u003e — same genetics, ready-to-inject format\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/www.midwestgrowkits.com\/collections\/spawn-bags\"\u003eUninoculated Spawn Bags\u003c\/a\u003e — to colonize your own grain from culture\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cdetails class=\"mgk-faq\"\u003e\n\u003csummary\u003e\u003cspan class=\"b\"\u003eIs this ready to use, or do I need to colonize it?\u003c\/span\u003e\u003c\/summary\u003e\n\u003cp\u003eIt's fully colonized and ready to go. Break it up and mix it directly into sterilized Master's Mix or your bulk substrate of choice — no inoculation, sterilization, or colonization wait on your end.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"mgk-faq\"\u003e\n\u003csummary\u003e\u003cspan class=\"b\"\u003eHow many Master's Mix blocks will one 5 LB bag inoculate?\u003c\/span\u003e\u003c\/summary\u003e\n\u003cp\u003eOne 5 LB bag inoculates 12–13 of our 5 LB Sterilized Master's Mix bags at our recommended ratio, turning a single spawn bag into a full block run.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"mgk-faq\"\u003e\n\u003csummary\u003e\u003cspan class=\"b\"\u003eMy spawn has yellow or amber droplets and reddish patches — is it contaminated?\u003c\/span\u003e\u003c\/summary\u003e\n\u003cp\u003eAlmost certainly not. Reishi mycelium naturally produces amber metabolite droplets and develops reddish-brown pigmentation as it matures — it's one of the most commonly misidentified \"problems\" in Reishi cultivation. Contamination looks different: green, black, or fuzzy colored growth, or a sour or foul smell. When in doubt, send us a photo.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"mgk-faq\"\u003e\n\u003csummary\u003e\u003cspan class=\"b\"\u003eHow do I get antler form instead of flat conks?\u003c\/span\u003e\u003c\/summary\u003e\n\u003cp\u003eAirflow controls the shape. Restricting fresh air exchange so CO₂ builds up pushes the fruit into the branching antler form; heavy fresh air exchange with good light produces the classic flat, lacquered conk. Many growers fruit in a sealed bag or tall container with a small opening to get antlers on purpose.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"mgk-faq\"\u003e\n\u003csummary\u003e\u003cspan class=\"b\"\u003eWhy does Reishi take so long?\u003c\/span\u003e\u003c\/summary\u003e\n\u003cp\u003eReishi runs a longer cycle than gourmet species — expect several weeks of colonization plus a fruiting period that can stretch a month or more, since the conks thicken and lacquer slowly. The upside is that it's extremely contamination-resistant and forgiving once established. Keep it warm at 75–85°F and be patient.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"mgk-faq\"\u003e\n\u003csummary\u003e\u003cspan class=\"b\"\u003eDo I need a flow hood to use this?\u003c\/span\u003e\u003c\/summary\u003e\n\u003cp\u003eNot for the simplest workflow — breaking the spawn into a freshly opened Master's Mix bag in a clean, still space works for many growers. But for grain-to-grain transfers or any extended open work, a laminar flow hood or clean-room setup with HEPA-filtered air significantly lowers contamination risk. We carry both in our \u003ca href=\"https:\/\/www.midwestgrowkits.com\/collections\/flow-hoods-clean-room\"\u003eflow hood and clean room collection\u003c\/a\u003e.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"mgk-faq\"\u003e\n\u003csummary\u003e\u003cspan class=\"b\"\u003eWhere do your genetics come from?\u003c\/span\u003e\u003c\/summary\u003e\n\u003cp\u003eOur cultures come from our own in-house master collection at Myco Labs, plus a partnership with one of the largest commercial culture suppliers in Canada and select strains sourced from the UK and Asia. Everything is maintained as first-generation commercial genetics and selected for vigor and true-to-type fruiting.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"mgk-faq\"\u003e\n\u003csummary\u003e\u003cspan class=\"b\"\u003eHow fresh is it, and how long will it stay viable?\u003c\/span\u003e\u003c\/summary\u003e\n\u003cp\u003eEvery bag is made fresh at our Illinois lab — never stockpiled for months. An unopened bag stays at peak viability for about 90 days at room temperature, or up to 120 days refrigerated. Refrigerate if you're not using it right away.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"mgk-faq\"\u003e\n\u003csummary\u003e\u003cspan class=\"b\"\u003eWhat if my bag arrives contaminated or damaged?\u003c\/span\u003e\u003c\/summary\u003e\n\u003cp\u003eWe guarantee every bag ships fully colonized and contamination-free. If you receive a contaminated or damaged bag, contact us within 5 days of delivery with a photo and we'll replace it free of charge.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e","brand":"Midwest Grow Kits","offers":[{"title":"Default Title","offer_id":47860051476629,"sku":"RRCG","price":26.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0712\/0679\/7461\/files\/Red_reishi_grain_spawn.jpg?v=1788020315","url":"https:\/\/www.midwestgrowkits.com\/products\/red-reishi-colonized-grain-spawn-5-lb","provider":"Midwest Grow Kits","version":"1.0","type":"link"}