{"product_id":"pasteurized-mushroom-substrate-bag","title":"Pasteurized Mushroom Substrate Bag – Coco Coir, Vermiculite \u0026 Gypsum, 4.5 lb","description":"\u003cp\u003e\u003cstrong\u003eSkip the mixing and pasteurizing.\u003c\/strong\u003e Our bulk substrate is a pre-hydrated blend of coco coir, vermiculite and gypsum (CVG) at field capacity, ready to mix with colonized grain spawn.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e4.5 lb bag of pasteurized CVG bulk substrate, the same bag that comes in our kits\u003c\/li\u003e\n\u003cli\u003eGlove pack (nitrile gloves and alcohol prep pads)\u003c\/li\u003e\n\u003cli\u003eInstructions and a FunGuy sticker\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eGrain spawn, tub and culture are sold separately. Add our \u003ca href=\"\/products\/sterilized-rye-grain-spawn-bags-1-lb\"\u003e1 lb Rye Grain Spawn Bags\u003c\/a\u003e or get both in the \u003ca href=\"\/products\/rye-grain-spawn-substrate-mushroom-grow-kit\"\u003eRye Grain + Substrate Kit\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eHow It Works\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrep:\u003c\/strong\u003e Clean your tub or bin and put on gloves.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpawn:\u003c\/strong\u003e Break up fully colonized grain spawn and mix it evenly with the substrate. Use 2 lb of grain spawn (two 1 lb bags) per substrate bag, the same ratio as in our kits.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColonize:\u003c\/strong\u003e Level the surface, cover, and keep dark at 75–80°F until it's covered in white mycelium.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFruit:\u003c\/strong\u003e Crack the lid for fresh air, add indirect light, and mist only when the surface looks dry.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHarvest:\u003c\/strong\u003e Pick before the caps flatten, rehydrate, and repeat.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eTimeline\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFirst harvest: about 3–5 weeks after inoculating your grain, depending on species and conditions\u003c\/li\u003e\n\u003cli\u003eUp to 3 flushes\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIdeal Conditions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eColonization: 75–80°F, in the dark\u003c\/li\u003e\n\u003cli\u003eFruiting: 65–75°F, indirect light, fresh air, high humidity\u003c\/li\u003e\n\u003cli\u003eContainer: a 16 qt tub (the size in our Monotub Starter Kit) or similar\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eYield Expectations\u003c\/h3\u003e\n\u003cp\u003eYield varies with species, culture and conditions. With 2 lb of spawn, expect up to 3 flushes; rehydrate between flushes.\u003c\/p\u003e\n\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is CVG?\u003c\/strong\u003e Coco coir, vermiculite and gypsum: a clean, moisture-holding bulk substrate that's easy for beginners.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhich mushrooms grow well on it?\u003c\/strong\u003e Works with a wide range of mushroom species. Lion's mane and shiitake prefer hardwood sawdust, so CVG isn't ideal for them.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs it pasteurized?\u003c\/strong\u003e Yes. The substrate is pasteurized, the standard treatment for a bulk substrate that you mix with colonized grain spawn.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow long does it keep?\u003c\/strong\u003e Unopened, it lasts 2–3 months, but use it as soon as possible so it doesn't dry out.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo I need to add water?\u003c\/strong\u003e No. It's pre-hydrated to field capacity.\u003c\/p\u003e\n\u003ch3\u003e100% Success Coverage\u003c\/h3\u003e\n\u003cp\u003eEvery FunGuy kit is made in our Rhode Island lab and backed by our 100% Success Coverage for 30 days. If your kit arrives contaminated, send us a photo and we'll replace it free of charge.\u003c\/p\u003e\n\u003cp\u003eMore help: \u003ca href=\"\/pages\/how-to-grow-mushrooms\"\u003eGrowing Guides\u003c\/a\u003e.\u003c\/p\u003e","brand":"FunGuy Grow Kits","offers":[{"title":"Default Title","offer_id":50260439400763,"sku":"","price":24.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0798\/1855\/5707\/files\/MainPhoto_245dfb41-7eb0-45bc-8499-73ddc9784ca2.png?v=1746227748","url":"https:\/\/funguykits.com\/products\/pasteurized-mushroom-substrate-bag","provider":"FunGuy Grow Kits","version":"1.0","type":"link"}