{"title":"Black King","description":"Want to grow black king oyster mushrooms? North Spore has everything you need to grow indoors -- from USDA-certified organic grow kits and fruiting blocks to grain spawn and liquid culture syringes (to make your own spawn!)","products":[{"product_id":"black-king-mushroom-ready-to-grow-fruiting-block-kit","title":"Organic Black King Mushroom Grow Kit Fruiting Block","description":"\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003eOur black king \u003cem\u003e(Pleurotus spp.) \u003c\/em\u003efruiting block features a strain that produces some of the heartiest mushrooms available for indoor cultivation. This hybrid strain grows mushrooms that are succulent and savory like blue oysters, but with the dense texture of a king trumpet. Black kings are less finicky than king trumpets and grow very well indoors. When cultivated successfully, you can expect a large harvest of meaty and delicious mushrooms. However, they prefer cooler temperatures and are prone to drying out or stopping their growth if humidity is not maintained when the mushrooms are still in their early stages.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"North Spore","offers":[{"title":"1-Pack","offer_id":44820873445478,"sku":"BLOCK-PSP1","price":29.99,"currency_code":"USD","in_stock":true},{"title":"4-Pack","offer_id":44820873478246,"sku":"BLOCK-PSP1-4CT","price":96.0,"currency_code":"USD","in_stock":true},{"title":"8-Pack","offer_id":44820873511014,"sku":"BLOCK-PSP1-8CT","price":144.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2418\/8179\/files\/fruiting-block-organic-black-king-mushroom-grow-kit-fruiting-block-1202701255.png?v=1762216119"},{"product_id":"black-king-mushroom-grain-spawn-certified-organic-6-lbs","title":"Organic Black King Mushroom Grain Spawn","description":"\u003cp\u003eOur USDA-certified organic black king \u003cem\u003e(Pleurotus spp.) \u003c\/em\u003egrain spawn features a strain that produces hearty mushrooms with beautiful brown marbled caps and soft stems. When cultivated successfully, you can expect a large harvest of very meaty and delicious mushrooms. Black kings offer the hearty texture of king trumpets, but the growth style of a regular oyster. They prefer cooler temperatures and are prone to drying out or stopping their growth if humidity is not maintained when the mushrooms are still in their early stages. They require high CO2 to achieve delicate, long stems, but can also be fruited like oysters. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRecommended use:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBlack king grain spawn can be used for indoor production using sawdust-based sterile substrate.\u003c\/li\u003e\n\u003cli\u003eDo not use grain spawn for log inoculation.\u003c\/li\u003e\n\u003cli\u003eThis is not a mushroom grow kit. Black king grain spawn must be combined with a substrate in order to fruit. \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eUpon receiving your spawn:\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eRemove it from the shipping box as soon as possible. Then, unfold the top of the bag, making room for air space. It's also important to check and confirm that the filter patch is not obstructed. This will help the organism breathe and continue to thrive!\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eScroll down for specifications, growing, and storage guides.\u003c\/em\u003e\u003c\/p\u003e","brand":"North Spore","offers":[{"title":"Default Title","offer_id":39513029967974,"sku":"GRAIN-PSP1","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2418\/8179\/files\/grain-spawn-organic-black-king-mushroom-grain-spawn-1202701239.png?v=1762216121"},{"product_id":"black-king-mushroom-liquid-culture-syringe","title":"Organic Black King Mushroom Liquid Culture Syringe","description":"\u003cp data-mce-fragment=\"1\"\u003e'Marbled' black king \u003cem data-mce-fragment=\"1\"\u003e(Pleurotus spp.)\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003c\/em\u003e-- also called black pearl king -- is a reliable commercial strain that grows some of the heartiest mushrooms with beautiful brown marbled caps and soft stems. When cultivated successfully, you can expect a large harvest of very meaty and delicious mushrooms. This strain is a cross between oyster and king trumpets from Japan. It prefers cooler temperatures and is prone to drying out or stopping growth if humidity is not maintained when the mushrooms are still in their early stages. Yield averages are .75-1.5 lb first flush off of 5 lb supplemented sawdust blocks. \u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eOur liquid culture syringes are ~10ml and come sealed in a plastic sleeve with a sterile 16 gauge needle and alcohol wipe.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eAbout liquid culture:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eLiquid culture is mycelium suspended in a nutrient-rich medium. Syringes are beginner-friendly and ideal for those looking for an easy way to inoculate grain bags and jars. \u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eUsing liquid culture:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eFor best results, refrigerate upon receipt. Syringes should be inserted into a self-healing injection port. Always handle using sterile technique and shake thoroughly before use. We recommended inoculation in either a still air box or flow hood to reduce the possibility of contamination. If you plan to re-use your needle, sterilize before and after each subsequent use.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cem\u003e\u003cbr\u003e\u003c\/em\u003e\u003c\/p\u003e","brand":"North Spore","offers":[{"title":"Default Title","offer_id":39627460116582,"sku":"LC-Psp1","price":19.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2418\/8179\/files\/culture-organic-black-king-mushroom-liquid-culture-syringe-1203144099.png?v=1762395650"},{"product_id":"black-king-plant-grow-garden-block","title":"Black King Oyster 'Plant \u0026 Grow' Mushroom Starter Block","description":"\u003cp\u003e\u003cem\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/em\u003e\u003cstrong\u003ePleurotus spp.\u003c\/strong\u003e\u003cem\u003e\u003cspan\u003e \u003c\/span\u003e| USDA Certified Organic\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMethod Skill Level\u003c\/strong\u003e: Beginner\u003cbr\u003e\u003cstrong\u003eSpecies Skill Level\u003c\/strong\u003e: Beginner\u003c\/p\u003e\n\u003cp\u003eDiscover one of the heartiest mushrooms for your garden with our\u003cspan\u003e \u003c\/span\u003e\u003cem\u003eBlack King Oyster Plant \u0026amp; Grow Mushroom Starter Block\u003c\/em\u003e. This USDA Certified Organic hybrid combines the savory succulence of blue oysters with the dense, meaty texture of king trumpets, offering a rich and satisfying mushroom experience straight from your soil.\u003c\/p\u003e\n\u003cp\u003eBlack Kings prefer cooler, shaded spots and need consistent humidity to thrive—especially during their early fruiting stages. When buried outdoors in the right conditions, they reward growers with large, meaty harvests. While they require a bit more attention to moisture than some oyster varieties, their robust flavor and texture make them well worth the effort.\u003c\/p\u003e\n\u003cp\u003eIdeal for gardeners ready to take on a slightly more involved but highly rewarding mushroom variety.\u003c\/p\u003e","brand":"North Spore","offers":[{"title":"1-Pack","offer_id":44645522276454,"sku":"GBLOCK-PSP1","price":29.99,"currency_code":"USD","in_stock":true},{"title":"4-Pack","offer_id":44645522309222,"sku":"GBLOCK-PSP1-4CT","price":96.0,"currency_code":"USD","in_stock":true},{"title":"8-Pack","offer_id":44645522341990,"sku":"GBLOCK-PSP1-8CT","price":144.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2418\/8179\/files\/fruiting-block-black-king-oyster-plant-grow-mushroom-starter-1220798168.png?v=1770934946"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2418\/8179\/collections\/blackking.jpg?v=1712880435","url":"https:\/\/northspore.com\/de\/collections\/black-king.oembed","provider":"North Spore","version":"1.0","type":"link"}