{"id":6349,"date":"2025-10-08T16:00:03","date_gmt":"2025-10-08T16:00:03","guid":{"rendered":"https:\/\/mycosupplies.eu\/?post_type=product&#038;p=6349"},"modified":"2026-10-26T14:41:26","modified_gmt":"2026-10-26T14:41:26","slug":"3b-unicorn-mushroom-grow-bag","status":"publish","type":"product","link":"https:\/\/mycosupplies.eu\/lv\/product\/3b-unicorn-mushroom-grow-bag\/","title":{"rendered":"3B Unicorn Bag"},"content":{"rendered":"<p>The <strong>3B Unicorn bag<\/strong> is a mushroom grow bag for fruiting bulk substrate. Its 5 micron filter patch lets fresh air in and CO2 out while keeping contaminants away, so your substrate can colonize and fruit right inside the bag.<\/p>\n<h3>Specifications<\/h3>\n<ul>\n<li><strong>Dimensions:<\/strong> 48 x 20 cm<\/li>\n<li><strong>Bag type:<\/strong> Fruiting bag<\/li>\n<li><strong>Filter:<\/strong> 5 micron<\/li>\n<\/ul>\n<h3>What is the 3B Unicorn bag used for?<\/h3>\n<p>The 5 micron filter allows more gas exchange than a spawn bag, which is what mycelium needs during bulk colonization and fruiting. Mix colonized grain spawn with a coir-vermiculite substrate, seal the bag, and let it colonize. Prefer a ready-made mix? See our <a href=\"\/product-category\/grain-substrate\/\">sterilized substrate<\/a>.<\/p>\n<p>For grain spawn and sterile work, choose a bag with a finer 0.2 micron filter such as the <a href=\"\/product\/3t-unicorn-spawn-bag\/\">3T Unicorn bag<\/a> or the <a href=\"\/product\/10t-unicorn-bag-with-injection-port\/\">10T with injection port<\/a>. Need more volume? The <a href=\"\/product\/xls-b-unicorn-mushroom-grow-bag\/\">XLS-B Unicorn bag<\/a> (60 x 24 cm) holds more substrate.<\/p>\n<h3>Sealing tip<\/h3>\n<p>Close the bag above the filter patch with an <a href=\"\/product\/impulse-sealer-for-mushroom-bags\/\">impulse sealer<\/a> for an airtight seal.<\/p>\n<h2>Why Choose the 3B Unicorn Mushroom Grow Bag?<\/h2>\n<p>The 3B Unicorn bag is a popular size for bulk substrate. In addition, its 5 micron filter gives mycelium plenty of fresh air. As a result, your substrate colonizes evenly and fruits well. Read our guide on <a href=\"\/2023\/06\/04\/how-to-grow-mushrooms\/\">how to grow mushrooms<\/a> for the full process, or learn about <a href=\"https:\/\/en.wikipedia.org\/wiki\/Fungiculture\" target=\"_blank\" rel=\"noopener\">fungiculture<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u2013 Dimensions: 48 x 20 cm<br \/>\n\u2013 Fruiting bag with 5 micron filter patch<br \/>\n\u2013 For bulk substrate colonization and fruiting<\/p>\n","protected":false},"featured_media":4743,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[163],"product_cat":[75],"product_tag":[],"class_list":["post-6349","product","type-product","status-publish","has-post-thumbnail","product_brand-unicorn-bags","product_cat-unicorn-bags-and-boxes","first","instock","taxable","shipping-taxable","purchasable","product-type-simple"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.8 (Yoast SEO v28.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>3B Unicorn Mushroom Grow Bag 48x20 | MycoSupplies<\/title>\n<meta name=\"description\" content=\"3B Unicorn mushroom grow bag (48 x 20 cm): a fruiting bag with a 5 micron filter patch for bulk substrate colonization and fruiting. 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