{"id":990320,"date":"2026-10-22T09:00:00","date_gmt":"2026-10-22T08:00:00","guid":{"rendered":"https:\/\/www.mondogrowkits.com\/?p=990320"},"modified":"2026-10-07T09:43:24","modified_gmt":"2026-10-07T08:43:24","slug":"cultivar-setas-de-ostra-en-casa","status":"publish","type":"post","link":"https:\/\/www.mondogrowkits.com\/es\/grow-oyster-mushrooms-at-home\/","title":{"rendered":"C\u00f3mo cultivar setas de ostra en casa (paso a paso)"},"content":{"rendered":"\n<div class=\"mgk-article\">\n<div class=\"mgk-lead\" style=\"font-family:'Outfit',sans-serif;margin:1.4em 0 1.6em;padding:22px 26px;border-radius:18px;background:#f4f1fa;border:1px solid #e7e0f0;color:#26332d;\"><p style=\"margin:0;font-weight:400;font-size:1.08em;line-height:1.65;\">To grow oyster mushrooms at home, you colonize a pasteurized or sterilized substrate (straw, hardwood sawdust or a coffee grounds mix) with oyster mycelium, keep it dark at about 24 \u00b0C for two to three weeks, then move it to cooler, humid air with light and fresh air to fruit. University of Florida extension guidance puts the first harvest roughly a week after pins appear, followed by two to four more flushes from the same block. Oyster mushrooms (Pleurotus ostreatus) are a common edible species and legal to grow everywhere in Europe.<\/p><\/div>\n<nav aria-label=\"Contents\" style=\"font-family:'Outfit',sans-serif;margin:0 0 1.8em;padding:16px 22px 10px;border:1px solid #e5e9e4;border-radius:18px;font-size:15px;line-height:1.45;\"><p style=\"font-family:'Outfit',sans-serif;margin:0 0 8px;color:#1f4d3a;font-size:12px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;\">Contents<\/p><ol style=\"margin:0 0 0 1.2em;padding:0;columns:2 260px;column-gap:32px;color:#a8b89f;\"><li style=\"margin:0 0 8px;padding-left:2px;break-inside:avoid;\"><a href=\"#why-are-oyster-mushrooms-the-easiest-edible-mushroom-to-grow\" style=\"color:#1f4d3a;text-decoration:none;\">Why are oyster mushrooms the easiest edible mushroom to grow?<\/a><\/li><li style=\"margin:0 0 8px;padding-left:2px;break-inside:avoid;\"><a href=\"#what-do-you-need-to-grow-oyster-mushrooms\" style=\"color:#1f4d3a;text-decoration:none;\">What do you need to grow oyster mushrooms?<\/a><\/li><li style=\"margin:0 0 8px;padding-left:2px;break-inside:avoid;\"><a href=\"#which-substrate-is-best-coffee-grounds-straw-or-hardwood-pellets\" style=\"color:#1f4d3a;text-decoration:none;\">Which substrate is best: coffee grounds, straw or hardwood pellets?<\/a><\/li><li style=\"margin:0 0 8px;padding-left:2px;break-inside:avoid;\"><a href=\"#how-do-you-grow-oyster-mushrooms-from-liquid-culture\" style=\"color:#1f4d3a;text-decoration:none;\">How do you grow oyster mushrooms from liquid culture?<\/a><\/li><li style=\"margin:0 0 8px;padding-left:2px;break-inside:avoid;\"><a href=\"#should-you-pasteurize-or-sterilize-the-substrate\" style=\"color:#1f4d3a;text-decoration:none;\">Should you pasteurize or sterilize the substrate?<\/a><\/li><li style=\"margin:0 0 8px;padding-left:2px;break-inside:avoid;\"><a href=\"#what-temperature-humidity-and-fresh-air-do-oyster-mushrooms-need\" style=\"color:#1f4d3a;text-decoration:none;\">What temperature, humidity and fresh air do oyster mushrooms need?<\/a><\/li><li style=\"margin:0 0 8px;padding-left:2px;break-inside:avoid;\"><a href=\"#how-and-when-do-you-harvest-oyster-mushrooms\" style=\"color:#1f4d3a;text-decoration:none;\">How and when do you harvest oyster mushrooms?<\/a><\/li><li style=\"margin:0 0 8px;padding-left:2px;break-inside:avoid;\"><a href=\"#how-much-will-one-oyster-mushroom-block-yield\" style=\"color:#1f4d3a;text-decoration:none;\">How much will one oyster mushroom block yield?<\/a><\/li><li style=\"margin:0 0 8px;padding-left:2px;break-inside:avoid;\"><a href=\"#what-are-the-most-common-mistakes-when-growing-oyster-mushrooms\" style=\"color:#1f4d3a;text-decoration:none;\">What are the most common mistakes when growing oyster mushrooms?<\/a><\/li><\/ol><\/nav>\n<h2 id=\"why-are-oyster-mushrooms-the-easiest-edible-mushroom-to-grow\">Why are oyster mushrooms the easiest edible mushroom to grow?<\/h2>\n<p>Oyster mushrooms are the easiest edible to start with because they colonize fast, accept many cheap substrates and fruit across a wide temperature range. The UF\/IFAS guide lists wheat straw, rice stalks, corn cobs, coffee grounds, cotton waste, peanut shells, banana leaves and even paper as workable substrates.<\/p>\n<p>Speed is the other advantage. Fast colonization means the mycelium claims the substrate before molds can, so small hygiene mistakes are punished less than with shiitake or lion&#8217;s mane. And the fruiting window is generous: the Wisconsin Mycological Society gives 7 to 18 \u00b0C for grey dove types of Pleurotus ostreatus, so a cool utility room or shed works.<\/p>\n<p>One catch: oyster mushrooms drop a lot of spores once the caps flatten, so fruit them in a utility room, cellar or shed rather than a bedroom.<\/p>\n<h2 id=\"what-do-you-need-to-grow-oyster-mushrooms\">What do you need to grow oyster mushrooms?<\/h2>\n<p>For a first grow from liquid culture, this list covers it:<\/p>\n<ul class=\"check-list\" style=\"list-style:none;margin-left:0;\"><li>&#9744; Oyster mushroom liquid culture (20 ml syringe with sterile needle)<\/li><li>&#9744; Grain for spawn: rye, wheat or millet, in jars or filter-patch bags<\/li><li>&#9744; Pressure cooker that reaches 15 psi (121 \u00b0C), for grain and sawdust<\/li><li>&#9744; Bulk substrate: straw, hardwood fuel pellets or coffee grounds mixed with sawdust<\/li><li>&#9744; Large pan or tub plus a thermometer, if you pasteurize straw<\/li><li>&#9744; Clear plastic bags or a tub, and a sharp knife for cutting holes<\/li><li>&#9744; Spray bottle, 70% alcohol, gloves and a face mask for handling straw<\/li><li>&#9744; Optional: a hygrometer and a heat mat for colonizing in a cold house<\/li><\/ul>\n<h2 id=\"which-substrate-is-best-coffee-grounds-straw-or-hardwood-pellets\">Which substrate is best: coffee grounds, straw or hardwood pellets?<\/h2>\n<p>Straw is the best all-round choice for a first grow, hardwood pellets give the cleanest and most repeatable result, and coffee grounds work best mixed with sawdust rather than on their own.<\/p>\n<style>@media (max-width:700px){.mgk-tabel-wrap{overflow:visible!important;border:0!important;border-radius:0!important;}.mgk-tabel,.mgk-tabel tbody,.mgk-tabel tr,.mgk-tabel td{display:block!important;width:100%!important;box-sizing:border-box;}.mgk-tabel thead{display:none!important;}.mgk-tabel tr{margin:0 0 14px;border:1px solid #e4e4e4;border-radius:14px;overflow:hidden;background:#ffffff;}.mgk-tabel td{border:0!important;border-bottom:1px solid #eeeeee!important;padding:.6em 1em!important;background:#ffffff!important;}.mgk-tabel td:last-child{border-bottom:0!important;}.mgk-tabel td:first-child{background:#1f4d3a!important;color:#ffffff!important;font-weight:600;}.mgk-tabel td:first-child a{color:#ffffff!important;}.mgk-tabel td[data-label]:not(:first-child)::before{content:attr(data-label);display:block;font-size:.78em;font-weight:600;letter-spacing:.04em;text-transform:uppercase;color:#8672b7;margin-bottom:2px;}}<\/style><div class=\"mgk-tabel-wrap\" style=\"overflow-x:auto;margin:1.2em 0 1.6em;border:1px solid #e5e9e4;border-radius:18px;\"><table class=\"compare-table mgk-tabel\" style=\"font-family:'Outfit',sans-serif;width:100%;border-collapse:collapse;font-size:.95em;margin:0;border:0;\"><thead><tr><th style=\"padding:12px 16px;text-align:left;background:#1f4d3a;color:#ffffff;font-weight:600;border:0;\">Substrate<\/th><th style=\"padding:12px 16px;text-align:left;background:#1f4d3a;color:#ffffff;font-weight:600;border:0;\">Treatment<\/th><th style=\"padding:12px 16px;text-align:left;background:#1f4d3a;color:#ffffff;font-weight:600;border:0;\">Advantages<\/th><th style=\"padding:12px 16px;text-align:left;background:#1f4d3a;color:#ffffff;font-weight:600;border:0;\">Disadvantages<\/th><\/tr><\/thead><tbody><tr><td data-label=\"Substrate\" style=\"padding:12px 16px;vertical-align:top;font-weight:400;border:0;border-top:1px solid #e5e9e4;background:#ffffff;font-weight:600;color:#1f4d3a;\">Wheat straw, chopped<\/td><td data-label=\"Treatment\" style=\"padding:12px 16px;vertical-align:top;font-weight:400;border:0;border-top:1px solid #e5e9e4;background:#ffffff;\">Pasteurize: 71 to 74 \u00b0C for 45 minutes to 2 hours<\/td><td data-label=\"Advantages\" style=\"padding:12px 16px;vertical-align:top;font-weight:400;border:0;border-top:1px solid #e5e9e4;background:#ffffff;\">Cheap, airy, classic oyster substrate, no pressure cooker needed for the bulk<\/td><td data-label=\"Disadvantages\" style=\"padding:12px 16px;vertical-align:top;font-weight:400;border:0;border-top:1px solid #e5e9e4;background:#ffffff;\">Dusty and bulky to handle; old straw yields less; open structure dries out faster<\/td><\/tr><tr><td data-label=\"Substrate\" style=\"padding:12px 16px;vertical-align:top;font-weight:400;border:0;border-top:1px solid #e5e9e4;background:#f7f8f5;font-weight:600;color:#1f4d3a;\">Hardwood pellets (beech, oak), soaked to sawdust<\/td><td data-label=\"Treatment\" style=\"padding:12px 16px;vertical-align:top;font-weight:400;border:0;border-top:1px solid #e5e9e4;background:#f7f8f5;\">Sterilize at 121 \u00b0C, especially when supplemented with bran<\/td><td data-label=\"Advantages\" style=\"padding:12px 16px;vertical-align:top;font-weight:400;border:0;border-top:1px solid #e5e9e4;background:#f7f8f5;\">Uniform, easy to weigh and hydrate, low contamination risk once sterilized<\/td><td data-label=\"Disadvantages\" style=\"padding:12px 16px;vertical-align:top;font-weight:400;border:0;border-top:1px solid #e5e9e4;background:#f7f8f5;\">Needs a pressure cooker for reliable results; supplemented sawdust contaminates fast if under-sterilized<\/td><\/tr><tr><td data-label=\"Substrate\" style=\"padding:12px 16px;vertical-align:top;font-weight:400;border:0;border-top:1px solid #e5e9e4;background:#ffffff;font-weight:600;color:#1f4d3a;\">Spent coffee grounds<\/td><td data-label=\"Treatment\" style=\"padding:12px 16px;vertical-align:top;font-weight:400;border:0;border-top:1px solid #e5e9e4;background:#ffffff;\">Mix 25 to 50% with sawdust and sterilize<\/td><td data-label=\"Advantages\" style=\"padding:12px 16px;vertical-align:top;font-weight:400;border:0;border-top:1px solid #e5e9e4;background:#ffffff;\">Free, already heat-treated by brewing, rich in nitrogen<\/td><td data-label=\"Disadvantages\" style=\"padding:12px 16px;vertical-align:top;font-weight:400;border:0;border-top:1px solid #e5e9e4;background:#ffffff;\">Grows mold within days if left standing; dense and wet on its own; prone to Trichoderma<\/td><\/tr><\/tbody><\/table><\/div>\n<p style=\"font-size:.9em;opacity:.8;\"><em>Sources: UF\/IFAS SL448 (straw, 74 \u00b0C), Wisconsin Mycological Society (71 \u00b0C, 45 min), SARE FNE17-874 (coffee grounds ratio), Mi\u015bkiewicz et al. 2025 (121 \u00b0C).<\/em><\/p>\n<p>Straw should be fresh: a 2023 study in Horticulturae found biological efficiency dropped from 26% to 15% as the same straw aged over four production cycles, because older straw loses soluble sugars. The SARE coffee grounds project in New York found that &#8220;a mixture of 25% to 50% of coffee grounds provided a reliable production of mushrooms&#8221;, with a 50\/50 mix of grounds and oak sawdust giving the most dependable second and third flushes. That project only beat <a href=\"\/mushroom-grow-kit-contamination-how-to-identify-it\/\">contamination<\/a> after tightening sterilization and hygiene.<\/p>\n<h2 id=\"how-do-you-grow-oyster-mushrooms-from-liquid-culture\">How do you grow oyster mushrooms from liquid culture?<\/h2>\n<p>With liquid culture you first make grain spawn, then mix that spawn into the bulk substrate. Injecting liquid culture straight into a straw bag rarely works, because 20 ml spread through several kilos of substrate leaves the mycelium too thin to outgrow competitors.<\/p>\n<div class=\"step-list\" style=\"font-family:'Outfit',sans-serif;margin:1.2em 0 1.6em;padding:6px 22px;background:#ffffff;border:1px solid #e5e9e4;border-radius:18px;\"><div style=\"display:flex;gap:14px;align-items:flex-start;padding:14px 0;\"><span style=\"flex:0 0 34px;width:34px;height:34px;border-radius:50%;background:#8672b7;color:#ffffff;display:inline-flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;line-height:1;\">1<\/span><div style=\"flex:1;min-width:0;padding-top:5px;\"><strong>Check the syringe.<\/strong> Hold it against the light. Clear liquid with white strands or clumps is healthy; cloudy liquid is not.<\/div><\/div><div style=\"display:flex;gap:14px;align-items:flex-start;padding:14px 0;border-top:1px solid #eef2eb;\"><span style=\"flex:0 0 34px;width:34px;height:34px;border-radius:50%;background:#8672b7;color:#ffffff;display:inline-flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;line-height:1;\">2<\/span><div style=\"flex:1;min-width:0;padding-top:5px;\"><strong>Prepare the grain.<\/strong> Rinse and simmer the grain until it is swollen but not split, let it steam-dry until the surface is dry, and fill jars or spawn bags about two-thirds full.<\/div><\/div><div style=\"display:flex;gap:14px;align-items:flex-start;padding:14px 0;border-top:1px solid #eef2eb;\"><span style=\"flex:0 0 34px;width:34px;height:34px;border-radius:50%;background:#8672b7;color:#ffffff;display:inline-flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;line-height:1;\">3<\/span><div style=\"flex:1;min-width:0;padding-top:5px;\"><strong>Sterilize the grain<\/strong> in a pressure cooker at 15 psi (121 \u00b0C). Let it cool completely, ideally overnight.<\/div><\/div><div style=\"display:flex;gap:14px;align-items:flex-start;padding:14px 0;border-top:1px solid #eef2eb;\"><span style=\"flex:0 0 34px;width:34px;height:34px;border-radius:50%;background:#8672b7;color:#ffffff;display:inline-flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;line-height:1;\">4<\/span><div style=\"flex:1;min-width:0;padding-top:5px;\"><strong>Inoculate.<\/strong> Work on a disinfected surface, wipe the needle and injection port with alcohol, and inject 2 to 5 ml per jar. The Mondo <a href=\"\/liquid-culture-syringe-manual-2\/\">liquid culture syringe manual<\/a> shows the hygiene steps with photos.<\/div><\/div><div style=\"display:flex;gap:14px;align-items:flex-start;padding:14px 0;border-top:1px solid #eef2eb;\"><span style=\"flex:0 0 34px;width:34px;height:34px;border-radius:50%;background:#8672b7;color:#ffffff;display:inline-flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;line-height:1;\">5<\/span><div style=\"flex:1;min-width:0;padding-top:5px;\"><strong>Colonize the grain<\/strong> in the dark at about 24 \u00b0C. Shake once at roughly 30% colonization to spread the mycelium. Expect two to three weeks for full colonization.<\/div><\/div><div style=\"display:flex;gap:14px;align-items:flex-start;padding:14px 0;border-top:1px solid #eef2eb;\"><span style=\"flex:0 0 34px;width:34px;height:34px;border-radius:50%;background:#8672b7;color:#ffffff;display:inline-flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;line-height:1;\">6<\/span><div style=\"flex:1;min-width:0;padding-top:5px;\"><strong>Prepare the bulk substrate:<\/strong> pasteurize the straw or sterilize the pellet or coffee mix, then let it cool below 30 \u00b0C and drain it. Squeeze a handful: a few drops should come out, not a stream.<\/div><\/div><div style=\"display:flex;gap:14px;align-items:flex-start;padding:14px 0;border-top:1px solid #eef2eb;\"><span style=\"flex:0 0 34px;width:34px;height:34px;border-radius:50%;background:#8672b7;color:#ffffff;display:inline-flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;line-height:1;\">7<\/span><div style=\"flex:1;min-width:0;padding-top:5px;\"><strong>Spawn to bulk.<\/strong> Mix the grain spawn evenly through the substrate at 5 to 10% by weight (UF\/IFAS); at home, 10% or a little more gives faster, safer colonization. Pack it into bags or a tub.<\/div><\/div><div style=\"display:flex;gap:14px;align-items:flex-start;padding:14px 0;border-top:1px solid #eef2eb;\"><span style=\"flex:0 0 34px;width:34px;height:34px;border-radius:50%;background:#8672b7;color:#ffffff;display:inline-flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;line-height:1;\">8<\/span><div style=\"flex:1;min-width:0;padding-top:5px;\"><strong>Incubate<\/strong> the bags in the dark at 24 to 25 \u00b0C until they are fully white, usually two to three weeks.<\/div><\/div><div style=\"display:flex;gap:14px;align-items:flex-start;padding:14px 0;border-top:1px solid #eef2eb;\"><span style=\"flex:0 0 34px;width:34px;height:34px;border-radius:50%;background:#8672b7;color:#ffffff;display:inline-flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;line-height:1;\">9<\/span><div style=\"flex:1;min-width:0;padding-top:5px;\"><strong>Start fruiting.<\/strong> Cut small X-shaped slits or holes in the bag, move it to cooler air with light and humidity, and wait for pins.<\/div><\/div><div style=\"display:flex;gap:14px;align-items:flex-start;padding:14px 0;border-top:1px solid #eef2eb;\"><span style=\"flex:0 0 34px;width:34px;height:34px;border-radius:50%;background:#8672b7;color:#ffffff;display:inline-flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;line-height:1;\">10<\/span><div style=\"flex:1;min-width:0;padding-top:5px;\"><strong>Harvest<\/strong> when the caps are full but the edges still curl down, then let the block rest and repeat.<\/div><\/div><\/div>\n<p>New to liquid cultures? Our comparison of <a href=\"\/liquid-culture-vs-spore-syringe\/\">liquid culture vs spore syringe<\/a> explains why a culture skips the slow germination step of spores.<\/p>\n<div class=\"callout tip\" style=\"font-family:'Outfit',sans-serif;margin:1.6em 0;padding:20px 24px;border-radius:18px;background:#eef2eb;border:1px solid #a8b89f;\"><p style=\"font-family:'Outfit',sans-serif;margin:0 0 8px;color:#1f4d3a;font-size:12px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;\">Make more spawn than you need<\/p><div style=\"color:#26332d;\"><p style=\"margin-bottom:.4em;\">One 20 ml syringe can inoculate several grain jars. Colonized grain can then be used to inoculate new jars (grain-to-grain transfer), so a single syringe can feed several bulk bags.<\/p><\/div><\/div>\n<h2 id=\"should-you-pasteurize-or-sterilize-the-substrate\">Should you pasteurize or sterilize the substrate?<\/h2>\n<p>Pasteurize low-nutrient substrates like straw, and sterilize anything rich in nutrients like supplemented sawdust, grain or coffee grounds.<\/p>\n<p>Pasteurization heats the substrate to around 65 to 80 \u00b0C. UF\/IFAS gives 74 \u00b0C (165 \u00b0F) in a water bath for one to two hours; the Wisconsin Mycological Society uses 71 \u00b0C (160 \u00b0F) for 45 minutes. This kills most molds and insects but leaves some heat-tolerant microbes alive, which helps protect the substrate while the oyster mycelium moves in.<\/p>\n<p>Sterilization at 121 \u00b0C under pressure kills practically everything. That is needed for grain and for sawdust supplemented with bran, because those nutrients would otherwise feed molds and bacteria faster than the mycelium can use them. A 2025 study in Scientific Reports autoclaved its straw and sawdust mixes at 121 \u00b0C for 30 minutes; at home, larger bags need longer in a pressure cooker because the heat takes time to reach the core.<\/p>\n<div class=\"callout warn\" style=\"font-family:'Outfit',sans-serif;margin:1.6em 0;padding:20px 24px;border-radius:18px;background:#fff8e9;border:1px solid #f1dfb4;\"><p style=\"font-family:'Outfit',sans-serif;margin:0 0 8px;color:#8a5a00;font-size:12px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;\">Pressure cookers and boiling water<\/p><div style=\"color:#26332d;\"><p style=\"margin-bottom:.4em;\">Pasteurizing straw means working with large volumes of near-boiling water, and pressure cookers store a lot of energy. Use a cooker with a working safety valve, never open it under pressure, and let pans of hot straw cool before you lift them.<\/p><\/div><\/div>\n<h2 id=\"what-temperature-humidity-and-fresh-air-do-oyster-mushrooms-need\">What temperature, humidity and fresh air do oyster mushrooms need?<\/h2>\n<p>Oyster mushrooms need warmth and darkness to colonize, then cooler, very humid air with light and plenty of fresh air to fruit.<\/p>\n<div class=\"mgk-tabel-wrap\" style=\"overflow-x:auto;margin:1.2em 0 1.6em;border:1px solid #e5e9e4;border-radius:18px;\"><table class=\"compare-table mgk-tabel\" style=\"font-family:'Outfit',sans-serif;width:100%;border-collapse:collapse;font-size:.95em;margin:0;border:0;\"><thead><tr><th style=\"padding:12px 16px;text-align:left;background:#1f4d3a;color:#ffffff;font-weight:600;border:0;\">Phase<\/th><th style=\"padding:12px 16px;text-align:left;background:#1f4d3a;color:#ffffff;font-weight:600;border:0;\">Temperature<\/th><th style=\"padding:12px 16px;text-align:left;background:#1f4d3a;color:#ffffff;font-weight:600;border:0;\">Humidity<\/th><th style=\"padding:12px 16px;text-align:left;background:#1f4d3a;color:#ffffff;font-weight:600;border:0;\">Light<\/th><th style=\"padding:12px 16px;text-align:left;background:#1f4d3a;color:#ffffff;font-weight:600;border:0;\">Fresh air<\/th><\/tr><\/thead><tbody><tr><td data-label=\"Phase\" style=\"padding:12px 16px;vertical-align:top;font-weight:400;border:0;border-top:1px solid #e5e9e4;background:#ffffff;font-weight:600;color:#1f4d3a;\">Grain and bulk colonization<\/td><td data-label=\"Temperature\" style=\"padding:12px 16px;vertical-align:top;font-weight:400;border:0;border-top:1px solid #e5e9e4;background:#ffffff;\">24 to 25 \u00b0C (UF\/IFAS)<\/td><td data-label=\"Humidity\" style=\"padding:12px 16px;vertical-align:top;font-weight:400;border:0;border-top:1px solid #e5e9e4;background:#ffffff;\">80 to 90% (kept in a closed bag)<\/td><td data-label=\"Light\" style=\"padding:12px 16px;vertical-align:top;font-weight:400;border:0;border-top:1px solid #e5e9e4;background:#ffffff;\">Dark<\/td><td data-label=\"Fresh air\" style=\"padding:12px 16px;vertical-align:top;font-weight:400;border:0;border-top:1px solid #e5e9e4;background:#ffffff;\">Not needed; filter patch or closed bag<\/td><\/tr><tr><td data-label=\"Phase\" style=\"padding:12px 16px;vertical-align:top;font-weight:400;border:0;border-top:1px solid #e5e9e4;background:#f7f8f5;font-weight:600;color:#1f4d3a;\">Pinning and fruiting<\/td><td data-label=\"Temperature\" style=\"padding:12px 16px;vertical-align:top;font-weight:400;border:0;border-top:1px solid #e5e9e4;background:#f7f8f5;\">About 18 to 20 \u00b0C (UF\/IFAS, WMS); grey dove strains 7 to 18 \u00b0C<\/td><td data-label=\"Humidity\" style=\"padding:12px 16px;vertical-align:top;font-weight:400;border:0;border-top:1px solid #e5e9e4;background:#f7f8f5;\">90 to 95% (UF\/IFAS, WMS, SARE)<\/td><td data-label=\"Light\" style=\"padding:12px 16px;vertical-align:top;font-weight:400;border:0;border-top:1px solid #e5e9e4;background:#f7f8f5;\">10 to 12 hours of indirect or cool light (WMS)<\/td><td data-label=\"Fresh air\" style=\"padding:12px 16px;vertical-align:top;font-weight:400;border:0;border-top:1px solid #e5e9e4;background:#f7f8f5;\">Regular air exchange; commercial target below 600 ppm CO2 (SARE)<\/td><\/tr><\/tbody><\/table><\/div>\n<p>Fresh air is where most home grows go wrong. Oyster mushrooms are very sensitive to CO2. In stale air they grow long, thin stems with small caps, as if they are reaching for oxygen. Fanning a tub several times a day usually solves it.<\/p>\n<p>Humidity is the second lever. Mist the walls of the tent or the air around the bag, not the young pins directly. Pins that turn yellow, or caps that crack at the edges, are signs that the air is too dry.<\/p>\n<p>In a cold house colonization slows down; a <a href=\"\/heat-mats\/\">heat mat<\/a> under the incubation shelf brings grain and bags back to about 24 \u00b0C.<\/p>\n<h2 id=\"how-and-when-do-you-harvest-oyster-mushrooms\">How and when do you harvest oyster mushrooms?<\/h2>\n<p><a href=\"\/how-to-harvest-magic-mushrooms\/\">Harvest<\/a> a whole cluster at once when the largest caps are fully formed but their edges still curl slightly downward. Once the edges flatten, spore drop rises and texture and shelf life suffer.<\/p>\n<p>Twist the cluster off at the base or cut it flush with the substrate, and remove any stumps left behind so they do not rot. UF\/IFAS describes two to four further flushes after the first, so three to five harvests from one block in total. Each flush is usually smaller than the one before. Between flushes, let the block rest for one to two weeks at <a href=\"\/optimal-light-airflow-and-humidity-for-fruiting\/\">fruiting conditions<\/a>; a block that feels light and dry can be soaked in cold water for a few hours to rehydrate.<\/p>\n<p>Keep fresh oysters a few days in a paper bag in the fridge, not in airtight plastic.<\/p>\n<h2 id=\"how-much-will-one-oyster-mushroom-block-yield\">How much will one oyster mushroom block yield?<\/h2>\n<p>Yields are measured as biological efficiency (BE): the fresh weight of mushrooms divided by the dry weight of the substrate, times 100. In published studies with Pleurotus ostreatus, BE ranges roughly from 15 to 62%, depending on substrate and conditions:<\/p>\n<div class=\"mgk-tabel-wrap\" style=\"overflow-x:auto;margin:1.2em 0 1.6em;border:1px solid #e5e9e4;border-radius:18px;\"><table class=\"compare-table mgk-tabel\" style=\"font-family:'Outfit',sans-serif;width:100%;border-collapse:collapse;font-size:.95em;margin:0;border:0;\"><thead><tr><th style=\"padding:12px 16px;text-align:left;background:#1f4d3a;color:#ffffff;font-weight:600;border:0;\">Study<\/th><th style=\"padding:12px 16px;text-align:left;background:#1f4d3a;color:#ffffff;font-weight:600;border:0;\">Substrate<\/th><th style=\"padding:12px 16px;text-align:left;background:#1f4d3a;color:#ffffff;font-weight:600;border:0;\">Biological efficiency<\/th><\/tr><\/thead><tbody><tr><td data-label=\"Study\" style=\"padding:12px 16px;vertical-align:top;font-weight:400;border:0;border-top:1px solid #e5e9e4;background:#ffffff;font-weight:600;color:#1f4d3a;\">Brunetti et al. 2023 (commercial bales)<\/td><td data-label=\"Substrate\" style=\"padding:12px 16px;vertical-align:top;font-weight:400;border:0;border-top:1px solid #e5e9e4;background:#ffffff;\">Wheat straw, fresh to aged<\/td><td data-label=\"Biological efficiency\" style=\"padding:12px 16px;vertical-align:top;font-weight:400;border:0;border-top:1px solid #e5e9e4;background:#ffffff;\">26% down to 15%<\/td><\/tr><tr><td data-label=\"Study\" style=\"padding:12px 16px;vertical-align:top;font-weight:400;border:0;border-top:1px solid #e5e9e4;background:#f7f8f5;font-weight:600;color:#1f4d3a;\">Mi\u015bkiewicz et al. 2025 (lab)<\/td><td data-label=\"Substrate\" style=\"padding:12px 16px;vertical-align:top;font-weight:400;border:0;border-top:1px solid #e5e9e4;background:#f7f8f5;\">Wheat straw alone \/ with bran \/ with brewer&#8217;s grains<\/td><td data-label=\"Biological efficiency\" style=\"padding:12px 16px;vertical-align:top;font-weight:400;border:0;border-top:1px solid #e5e9e4;background:#f7f8f5;\">42% \/ 45% \/ 54%<\/td><\/tr><tr><td data-label=\"Study\" style=\"padding:12px 16px;vertical-align:top;font-weight:400;border:0;border-top:1px solid #e5e9e4;background:#ffffff;font-weight:600;color:#1f4d3a;\">Dissasa 2022<\/td><td data-label=\"Substrate\" style=\"padding:12px 16px;vertical-align:top;font-weight:400;border:0;border-top:1px solid #e5e9e4;background:#ffffff;\">Coffee husk or parchment with cow dung and gypsum<\/td><td data-label=\"Biological efficiency\" style=\"padding:12px 16px;vertical-align:top;font-weight:400;border:0;border-top:1px solid #e5e9e4;background:#ffffff;\">39 to 62%<\/td><\/tr><\/tbody><\/table><\/div>\n<p>In practical terms, 1 kg of dry straw that you hydrate and spawn can, as a rough estimate based on these figures, give 300 to 500 g of fresh oyster mushrooms over all flushes at home, with more on supplemented substrates in controlled conditions. The SARE coffee grounds project, measuring by wet weight, averaged about 1 pound of mushrooms per 6-pound bag of grounds and sawdust, with large variation between bags.<\/p>\n<h2 id=\"what-are-the-most-common-mistakes-when-growing-oyster-mushrooms\">What are the most common mistakes when growing oyster mushrooms?<\/h2>\n<p>The most common mistake is substrate that is too wet, followed by too little fresh air during fruiting:<\/p>\n<ul><li><strong>Soggy substrate.<\/strong> Water pooling at the bottom of the bag invites bacteria. Drain properly and do the squeeze test.<\/li><li><strong>Not enough fresh air.<\/strong> Long stems and small caps mean CO2 is too high.<\/li><li><strong>Too little spawn.<\/strong> Below 5% the mycelium colonizes slowly and green Trichoderma gets a chance.<\/li><li><strong>Old coffee grounds.<\/strong> Grounds left standing for days are already colonized by molds.<\/li><li><strong>Under-sterilized grain or sawdust.<\/strong> Too short in the pressure cooker, or bags packed too big.<\/li><li><strong>Harvesting late.<\/strong> Flat caps mean spores everywhere and a shorter shelf life.<\/li><li><strong>Fruiting in a living space.<\/strong> Choose a room where spores and moisture are not a problem.<\/li><\/ul>\n<div class=\"callout green mgk-proof\" style=\"font-family:'Outfit',sans-serif;margin:2em 0;padding:clamp(18px,5vw,30px);border-radius:22px;background:#1f4d3a;color:#ffffff;box-sizing:border-box;\">\n<p style=\"margin:0 0 .7em;font-size:1.15em;line-height:1.35;font-weight:700;color:#ffffff;\">Oyster mushroom liquid culture from Mondo<\/p>\n<div style=\"display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,190px),1fr));gap:8px;margin:0 0 1.1em;\"><span style=\"display:flex;align-items:center;gap:.45em;background:rgba(255,255,255,.10);border:1px solid #a8b89f;border-radius:12px;padding:.5em .8em;font-size:.92em;line-height:1.3;\"><span style=\"flex:0 0 auto;color:#a8b89f;font-weight:700;\">&#10003;<\/span><span>Growing since 2009<\/span><\/span><span style=\"display:flex;align-items:center;gap:.45em;background:rgba(255,255,255,.10);border:1px solid #a8b89f;border-radius:12px;padding:.5em .8em;font-size:.92em;line-height:1.3;\"><span style=\"flex:0 0 auto;color:#a8b89f;font-weight:700;\">&#10003;<\/span><span>Discreet, tracked shipping<\/span><\/span><span style=\"display:flex;align-items:center;gap:.45em;background:rgba(255,255,255,.10);border:1px solid #a8b89f;border-radius:12px;padding:.5em .8em;font-size:.92em;line-height:1.3;\"><span style=\"flex:0 0 auto;color:#a8b89f;font-weight:700;\">&#10003;<\/span><span>Step-by-step manuals<\/span><\/span><\/div>\n\n<p style=\"margin:0 0 1.1em;color:#ffffff;font-weight:400;\">The Mondo oyster mushroom syringe holds 20 ml of living Pleurotus ostreatus culture and comes with a sterile needle, alcohol swabs and a step-by-step manual. Orders ship discreetly with tracking. <\/p>\n<div style=\"display:flex;flex-wrap:wrap;align-items:center;gap:6px 18px;\"><a href=\"\/liquid-culture-oyster-mushroom\/\" class=\"button secondary\" style=\"border-radius:99px;\">\n\t\t<span>Shop oyster liquid culture<\/span>\n\t<\/a>\n\n<\/div><\/div>\n<h2 id=\"more-questions-about-growing-oyster-mushrooms\">More questions about growing oyster mushrooms<\/h2>\n<div class=\"accordion\">\n\t<div id=\"accordion-1786441417\" class=\"accordion-item\">\n\t\t<a id=\"accordion-1786441417-label\" class=\"accordion-title plain\" href=\"#accordion-item-can-i-grow-oyster-mushrooms-on-coffee-grounds-alone?\" aria-expanded=\"false\" aria-controls=\"accordion-1786441417-content\">\n\t\t\t<button class=\"toggle\" aria-label=\"Toggle\"><i class=\"icon-angle-down\" aria-hidden=\"true\"><\/i><\/button>\n\t\t\t<span>Can I grow oyster mushrooms on coffee grounds alone?<\/span>\n\t\t<\/a>\n\t\t<div id=\"accordion-1786441417-content\" class=\"accordion-inner\" aria-labelledby=\"accordion-1786441417-label\">\n\t\t\t\n<p>It is possible on a small scale with very fresh grounds, but results are less reliable. Grounds on their own are dense and wet, and they mold quickly. The SARE project got its most consistent results with 25 to 50% grounds mixed with hardwood sawdust and then sterilized.<\/p>\n\t\t<\/div>\n\t<\/div>\n\t\n\t<div id=\"accordion-1097862380\" class=\"accordion-item\">\n\t\t<a id=\"accordion-1097862380-label\" class=\"accordion-title plain\" href=\"#accordion-item-do-i-need-a-pressure-cooker-to-grow-oyster-mushrooms?\" aria-expanded=\"false\" aria-controls=\"accordion-1097862380-content\">\n\t\t\t<button class=\"toggle\" aria-label=\"Toggle\"><i class=\"icon-angle-down\" aria-hidden=\"true\"><\/i><\/button>\n\t\t\t<span>Do I need a pressure cooker to grow oyster mushrooms?<\/span>\n\t\t<\/a>\n\t\t<div id=\"accordion-1097862380-content\" class=\"accordion-inner\" aria-labelledby=\"accordion-1097862380-label\">\n\t\t\t\n<p>For grain spawn from liquid culture, yes, because grain has to be sterilized. The bulk substrate can do without one if you use pasteurized straw. If you buy ready-made grain spawn, you can grow on straw with only a large pan and a thermometer.<\/p>\n\t\t<\/div>\n\t<\/div>\n\t\n\t<div id=\"accordion-355598383\" class=\"accordion-item\">\n\t\t<a id=\"accordion-355598383-label\" class=\"accordion-title plain\" href=\"#accordion-item-how-long-does-it-take-from-liquid-culture-to-first-harvest?\" aria-expanded=\"false\" aria-controls=\"accordion-355598383-content\">\n\t\t\t<button class=\"toggle\" aria-label=\"Toggle\"><i class=\"icon-angle-down\" aria-hidden=\"true\"><\/i><\/button>\n\t\t\t<span>How long does it take from liquid culture to first harvest?<\/span>\n\t\t<\/a>\n\t\t<div id=\"accordion-355598383-content\" class=\"accordion-inner\" aria-labelledby=\"accordion-355598383-label\">\n\t\t\t\n<p>Count on roughly five to eight weeks: two to three weeks for the grain, two to three weeks for the bulk substrate, and about one to two weeks from fruiting conditions to harvest. Cold rooms and low spawn rates make it slower.<\/p>\n\t\t<\/div>\n\t<\/div>\n\t\n\t<div id=\"accordion-1531148247\" class=\"accordion-item\">\n\t\t<a id=\"accordion-1531148247-label\" class=\"accordion-title plain\" href=\"#accordion-item-can-i-fruit-oyster-mushrooms-outdoors?\" aria-expanded=\"false\" aria-controls=\"accordion-1531148247-content\">\n\t\t\t<button class=\"toggle\" aria-label=\"Toggle\"><i class=\"icon-angle-down\" aria-hidden=\"true\"><\/i><\/button>\n\t\t\t<span>Can I fruit oyster mushrooms outdoors?<\/span>\n\t\t<\/a>\n\t\t<div id=\"accordion-1531148247-content\" class=\"accordion-inner\" aria-labelledby=\"accordion-1531148247-label\">\n\t\t\t\n<p>Yes. Colonized straw bags or logs can fruit in a shaded spot outside in spring and autumn, when temperatures sit in the fruiting range. Yields vary more, and slugs find them too.<\/p>\n\t\t<\/div>\n\t<\/div>\n\t\n\t<div id=\"accordion-2666368088\" class=\"accordion-item\">\n\t\t<a id=\"accordion-2666368088-label\" class=\"accordion-title plain\" href=\"#accordion-item-does-an-oyster-mushroom-liquid-culture-need-to-be-refrigerated?\" aria-expanded=\"false\" aria-controls=\"accordion-2666368088-content\">\n\t\t\t<button class=\"toggle\" aria-label=\"Toggle\"><i class=\"icon-angle-down\" aria-hidden=\"true\"><\/i><\/button>\n\t\t\t<span>Does an oyster mushroom liquid culture need to be refrigerated?<\/span>\n\t\t<\/a>\n\t\t<div id=\"accordion-2666368088-content\" class=\"accordion-inner\" aria-labelledby=\"accordion-2666368088-label\">\n\t\t\t\n<p>Yes. Store it at 2 to 8 \u00b0C in the dark and never freeze it. Mondo&#8217;s guidance for liquid culture syringes is a shelf life of six to eight months, but fresher cultures start faster. Browse the other <a href=\"\/gourmet-functional-mushroom-liquid-cultures\/\">gourmet and functional mushroom liquid cultures<\/a> if you want to grow more species after oysters.<\/p>\n\t\t<\/div>\n\t<\/div>\n\t\n<\/div>\n\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>La seta de ostra es la seta comestible m\u00e1s agradecida que puedes cultivar en interior. Qu\u00e9 sustrato elegir, c\u00f3mo pasar del cultivo l\u00edquido a la cosecha y qu\u00e9 valores mantener en cada fase.<\/p>","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"wpai_generated_summary":"","_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[178],"tags":[],"class_list":["post-990320","post","type-post","status-publish","format-standard","hentry","category-growing-guides"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/www.mondogrowkits.com\/es\/wp-json\/wp\/v2\/posts\/990320","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.mondogrowkits.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.mondogrowkits.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.mondogrowkits.com\/es\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.mondogrowkits.com\/es\/wp-json\/wp\/v2\/comments?post=990320"}],"version-history":[{"count":1,"href":"https:\/\/www.mondogrowkits.com\/es\/wp-json\/wp\/v2\/posts\/990320\/revisions"}],"predecessor-version":[{"id":990364,"href":"https:\/\/www.mondogrowkits.com\/es\/wp-json\/wp\/v2\/posts\/990320\/revisions\/990364"}],"wp:attachment":[{"href":"https:\/\/www.mondogrowkits.com\/es\/wp-json\/wp\/v2\/media?parent=990320"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.mondogrowkits.com\/es\/wp-json\/wp\/v2\/categories?post=990320"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.mondogrowkits.com\/es\/wp-json\/wp\/v2\/tags?post=990320"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}