{"product_id":"grain-spawn-jars","title":"Grain Spawn Jars","description":"\u003ch2 class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eGrain Spawn Jars for Strong, Healthy Mycelium Growth\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eOur Grain Spawn Jars give you a sterile, reliable environment to grow mycelium from the first inoculation to a full harvest. Available in 210ml and 720ml, these mushroom grow jars work for every stage of cultivation, from agar transfers to PF Tek fruiting.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\"\u003eThree Ways to Use Your Mushroom Growing Jars\u003c\/h3\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003e1. Agar Inoculation\u003c\/strong\u003e \u003cem\u003e(210ml)\u003c\/em\u003e Use the self-healing injection port for spore-to-agar transfers. The sealed port delivers a 95% contamination-free success rate without needing a flow hood or glove box.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003e2. Grain Spawn and Mycelium Colonization\u003c\/strong\u003e \u003cem\u003e(210ml and 720ml)\u003c\/em\u003e Fill with your preferred grain, inoculate, and colonize. The 720ml jar holds enough colonized grain to support a full monotub. The 210ml works well for smaller runs or experimental batches.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003e3. PF Tek\u003c\/strong\u003e \u003cem\u003e(210ml)\u003c\/em\u003e No extra equipment needed. Inoculate, colonize, and fruit directly from the 210ml jar using the classic PF Tek method.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\"\u003eWhy These Grain Spawn Jars Work\u003c\/h3\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003ePressure Cooker Safe up to 15 PSI\u003c\/strong\u003e Built to handle full pressure cooker sterilization cycles without cracking or warping. Reliable across many repeated uses.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003e95% Contamination-Free Success Rate\u003c\/strong\u003e The self-healing injection port reseals after every syringe injection. Less contamination means fewer failed jars and less wasted grain.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eNo Pressure Cooker Required for Beginners\u003c\/strong\u003e These jars can be used with steam sterilization or stovetop methods. You do not need a full pressure cooker setup to get started.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eSized for Real Results\u003c\/strong\u003e The 720ml jar gives enough grain to colonize a dense pin set in your monotub. The 210ml fits agar work, PF Tek cakes, and smaller grain batches without wasting substrate.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eRust-Resistant Zinc Coating\u003c\/strong\u003e Every lid hole is coated with 99% zinc. The coating holds up after repeated sterilization cycles so the lids stay clean and usable long term.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch2 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\"\u003eHow to Make Mushroom Grain Spawn\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eWhat you need:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eGrain Spawn Jars (720ml recommended)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eRye, wheat, or oat grain\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003ePressure cooker\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eSpore syringe or liquid culture\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eStep 1 - Prepare your grain\u003c\/strong\u003e Simmer your grain for 60 to 90 minutes until fully hydrated but not split open. Drain well and let it surface-dry before filling your jars.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eStep 2 - Fill your jars\u003c\/strong\u003e Fill each 720ml jar about three quarters full. Leave headspace for airflow during colonization.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eStep 3 - Sterilize\u003c\/strong\u003e Pressure cook at 15 PSI for 90 to 120 minutes. Let the jars cool completely to room temperature before inoculating.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eStep 4 - Inoculate\u003c\/strong\u003e Inject your spore syringe or liquid culture through the self-healing port. No open flame or flow hood needed.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eStep 5 - Colonize\u003c\/strong\u003e Store at 21 to 24°C in a dark spot. Give the jar a gentle shake once partial colonization is visible to speed up the rest. Full colonization takes 2 to 4 weeks depending on the species.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eStep 6 - Use your spawn\u003c\/strong\u003e Break up the colonized grain and transfer to your bulk substrate or fruiting chamber.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\"\u003eJar Specifications\u003c\/h3\u003e\n\u003cdiv class=\"overflow-x-auto w-full px-2 mb-6\"\u003e\n\u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n\u003cthead class=\"text-left\"\u003e\n\u003ctr\u003e\n\u003cth scope=\"col\" class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\"\u003e\u003c\/th\u003e\n\u003cth scope=\"col\" class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\"\u003eSmall Jar\u003c\/th\u003e\n\u003cth scope=\"col\" class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\"\u003eLarge Jar\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eVolume\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e210ml\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e720ml\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eBest for\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eAgar, PF Tek, small batches\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eGrain spawn, mycelium colonization\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003ePressure rating\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eUp to 15 PSI\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eUp to 15 PSI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eLid coating\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e99% Zinc\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e99% Zinc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eInjection port\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eSelf-healing\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eSelf-healing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch2 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eCan I use these jars without a pressure cooker?\u003c\/strong\u003e Yes. These jars work with steam sterilization and stovetop methods. A pressure cooker gives the most reliable sterilization but is not required to get started.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eWhat grain works best?\u003c\/strong\u003e Rye berries are the most common choice because they colonize quickly and hold moisture well. Wheat, oats, and popcorn also work well with these jars.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eHow many times can I reuse the jars?\u003c\/strong\u003e The jars and lids are built for repeated use. Clean and re-sterilize between batches. The zinc coating and self-healing ports hold up over time.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eDo these jars work for all mushroom species?\u003c\/strong\u003e Yes. They work for oyster mushrooms, shiitake, lion's mane, reishi, and most other gourmet and medicinal species.\u003c\/p\u003e\n\u003c!----\u003e","brand":"EasyMushroomCultivation","offers":[{"title":"Default Title","offer_id":48940432261459,"sku":"JAR-KIT","price":14.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0883\/3758\/0371\/files\/Mushroom-cultivation-jars-injection-ports-filters.webp?v=1780674862","url":"https:\/\/easymushroomcultivation.com\/en-gb\/products\/grain-spawn-jars","provider":"EasyMushroomCultivation","version":"1.0","type":"link"}