{"id":9257,"date":"2026-11-03T09:27:28","date_gmt":"2026-11-03T08:27:28","guid":{"rendered":"https:\/\/bio-grow.com\/?p=9257"},"modified":"2026-11-04T09:53:53","modified_gmt":"2026-11-04T08:53:53","slug":"after-the-last-harvest-reuse-recycle-or-replace-your-coir-bags","status":"publish","type":"post","link":"https:\/\/bio-grow.com\/en\/agronomy-field\/after-the-last-harvest-reuse-recycle-or-replace-your-coir-bags\/","title":{"rendered":"After the last harvest: reuse, recycle or replace your coir bags?"},"content":{"rendered":"<style>\n.et_pb_title_featured_container{display:none}\n\/* Titre du th\u00e8me masqu\u00e9 \u00e0 l'\u00e9cran (le titre visible est dans l'image d'en-t\u00eate), gard\u00e9 pour le r\u00e9f\u00e9rencement et les lecteurs d'\u00e9cran *\/\n.et_pb_post_title 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.bgart-regrow-label{display:inline-block;font-size:12px!important;font-weight:800!important;letter-spacing:.14em;text-transform:uppercase;color:#003232!important;background:#96c11f;padding:6px 14px;border-radius:3px;margin:0 0 18px!important}\n.bgart .bgart-regrow-img{display:block;width:100%;max-width:520px;height:auto;margin:0 auto 24px}\n.bgart .bgart-regrow p{color:rgba(255,255,255,.9)!important}\n.bgart .bgart-regrow .bgart-tips li{color:rgba(255,255,255,.9)!important}\n.bgart .bgart-regrow .bgart-tips li::before{background:#96c11f;color:#003232}\n.bgart .bgart-regrow .bgart-tips li strong{color:#fff}\n.bgart .bgart-regrow a.bgart-regrow-btn{display:inline-block;background:#96c11f;color:#003232!important;text-decoration:none!important;padding:15px 26px;border-radius:5px;font-size:13.5px;font-weight:800;letter-spacing:.06em;text-transform:uppercase}\n@media screen and (max-width:768px){.bgart .bgart-regrow{padding:28px 22px 26px}}\n<\/style>\n<div class=\"bgart-hero-wrap\">\n  <img decoding=\"async\" src=\"https:\/\/bio-grow.com\/wp-content\/uploads\/2026\/10\/fraise-grappe-gouttiere-bokeh-large.jpg\" alt=\"Ripe strawberries in a raised gutter\" \/><\/p>\n<div class=\"bgart-hero-overlay\"><\/div>\n<p>  <span class=\"bgart-hero-kicker\">Root Zone No. 1 \u00b7 Strawberry<\/span><\/p>\n<div class=\"bgart-hero-title\">After the last harvest: reuse, recycle or replace your coir bags?<\/div>\n<\/div>\n<div class=\"bgart\">\n<div class=\"bgart-tags\">\n    <span class=\"bgart-tag\">Root Zone<\/span><br \/>\n    <span class=\"bgart-tag\">Strawberry<\/span><br \/>\n    <span class=\"bgart-tag\">Coir substrate<\/span><br \/>\n    <span class=\"bgart-tag\">End of season<\/span><br \/>\n    <span class=\"bgart-tag\">Regrow<\/span>\n  <\/div>\n<p class=\"bgart-chapeau\">For many strawberry growers, the end of the season brings back the same question: what to do with the bags? Replant into them, compost them, recycle them, or start again with new ones? In this article, we look at what the trials measured for each option, why used coir loses yield, and how <strong style=\"font-style:normal;color:#006465\">Regrow, our recycled coir substrate made in the UK<\/strong>, answers the problem.<\/p>\n<h2 style=\"text-transform:uppercase\">What the trials show<\/h2>\n<p>In a NIAB trial (2022-2023), every alternative to virgin coir cost yield. Strawberry plants replanted directly into used coir yielded <strong>10% less<\/strong>. Composted coir lost <strong>16%<\/strong>. Even coir recycled on its own, with an industrial process still under development, lost <strong>4%<\/strong>: on a whole crop, that is still a lot of fruit.<\/p>\n<div class=\"bgart-stats\">\n<div class=\"bgart-stat\"><span class=\"bgart-stat-number\">\u221210%<\/span><\/p>\n<p class=\"bgart-stat-label\">coir reused directly<\/p>\n<\/div>\n<div class=\"bgart-stat\"><span class=\"bgart-stat-number\">\u221216%<\/span><\/p>\n<p class=\"bgart-stat-label\">composted coir<\/p>\n<\/div>\n<div class=\"bgart-stat\"><span class=\"bgart-stat-number\">\u22124%<\/span><\/p>\n<p class=\"bgart-stat-label\">coir recycled on its own<\/p>\n<\/div><\/div>\n<p class=\"bgart-stats-caption\">Yield compared with virgin coir. NIAB trial, 2022-2023.<\/p>\n<p>The type of crop matters too. In an earlier project run with growers, June-bearers were successfully replanted into used bags. Everbearers replanted year after year, on the other hand, suffered a significant yield loss.<\/p>\n<p class=\"bgart-source\">Source: <a href=\"https:\/\/www.niab.com\/sites\/default\/files\/imce_uploads\/FruitMembership\/NIAB%20Fruit%20Annual%20Review%202023.pdf\" target=\"_blank\" rel=\"noopener\">NIAB, <em>Fruit Annual Review 2023<\/em>, &#8220;Developing methods to recycle coir substrate&#8221;, p.&nbsp;26<\/a><\/p>\n<p>Recycling alone is not enough: the substrate also needs a fresh structure. That is why <a href=\"#regrow\" style=\"color:#006465;font-weight:700\">Regrow blends recycled coir with new coir<\/a>, and why it gave similar yields in a commercial trial.<\/p>\n<figure>\n    <img decoding=\"async\" src=\"https:\/\/bio-grow.com\/wp-content\/uploads\/2026\/10\/fraise-gouttieres-suspendues-serre-large.jpg\" alt=\"Suspended gutters full of strawberries in a glasshouse\" class=\"bgart-img\" \/><figcaption>With everbearers, grown for a long time in the same bag, the question of reuse matters most.<\/figcaption><\/figure>\n<h2 style=\"text-transform:uppercase\">Why second-season coir loses performance<\/h2>\n<p>Used coir holds less air than virgin coir, and much more water. Commercial trials in Tasmania, published this year, point to the same cause: if second-year coir loses performance, it is mainly because the substrate breaks down physically, rather than because of a higher disease risk.<\/p>\n<p>Over the season, fine particles move down and clog the pores in the lower part of the root zone. They create wetter areas there, short of oxygen. Hygiene matters too, but the trials show that most of the yield is lost through the structure.<\/p>\n<p class=\"bgart-source\">Sources: <a href=\"https:\/\/www.niab.com\/sites\/default\/files\/imce_uploads\/FruitMembership\/NIAB%20Fruit%20Annual%20Review%202023.pdf\" target=\"_blank\" rel=\"noopener\">NIAB, <em>Fruit Annual Review 2023<\/em>, &#8220;Developing methods to recycle coir substrate&#8221;, p.&nbsp;26<\/a>; <a href=\"https:\/\/www.fruitgrowerstas.org.au\/coir-reuse-project-findings-2026\/\" target=\"_blank\" rel=\"noopener\">Fruit Growers Tasmania \/ RMCG, &#8220;Coir reuse project findings&#8221; (2026)<\/a><\/p>\n<h2 id=\"regrow\" style=\"text-transform:uppercase;scroll-margin-top:120px\">Regrow: recycled coir with a fresh structure<\/h2>\n<p>Recycled coir on its own still loses yield, because its structure is worn. Regrow does not stop at recycling: the used coir is sterilised, then <strong>blended with new coir<\/strong>, which brings back the structure the trials point to.<\/p>\n<div class=\"bgart-regrow\">\n<p class=\"bgart-regrow-label\">Regrow \u00b7 Made in the UK<\/p>\n<p>    <img decoding=\"async\" src=\"https:\/\/bio-grow.com\/wp-content\/uploads\/2026\/11\/growbag-regrow-detoure.png\" alt=\"Regrow grow bag, recycled coir substrate made in the UK\" class=\"bgart-regrow-img\" \/><\/p>\n<ol class=\"bgart-tips\">\n<li><strong>Collected<\/strong>Used coir is collected from UK growers after the last harvest.<\/li>\n<li><strong>Sterilised<\/strong>It is heat-treated, which removes weeds and pathogens.<\/li>\n<li><strong>Restructured<\/strong>It is blended with new, RPC-certified coir, which brings back a fresh structure.<\/li>\n<li><strong>Back in production<\/strong>It goes back into glasshouses and tunnels as grow bags, big bags or bulk.<\/li>\n<\/ol>\n<p>Available now for the 2027 season, with delivery across the UK and Ireland.<\/p>\n<p>    <a class=\"bgart-regrow-btn\" href=\"https:\/\/bio-grow.co.uk\/\" target=\"_blank\" rel=\"noopener\">Discover Regrow \u2192<\/a>\n  <\/div>\n<p style=\"margin-top:32px!important\">In a recent commercial trial on everbearers, shared with us by our recycling partner, the recycled coir used in Regrow gave a similar yield to virgin and reused coir combined, with an earlier harvest and less fertigation.<\/p>\n<div class=\"bgart-stats\">\n<div class=\"bgart-stat win\"><span class=\"bgart-stat-number\">1.3&nbsp;kg<\/span><\/p>\n<p class=\"bgart-stat-label\">per plant, a similar yield<\/p>\n<\/div>\n<div class=\"bgart-stat win\"><span class=\"bgart-stat-number\">7-10<\/span><\/p>\n<p class=\"bgart-stat-label\">days earlier to harvest<\/p>\n<\/div>\n<div class=\"bgart-stat win\"><span class=\"bgart-stat-number\">\u221212%<\/span><\/p>\n<p class=\"bgart-stat-label\">fertigation over the season<\/p>\n<\/div><\/div>\n<p class=\"bgart-stats-caption\">Recent commercial trial on everbearers. The harvests in virgin and reused coir were recorded together, so the recycled coir is compared with the two combined.<\/p>\n<p class=\"bgart-source\">Source: recent commercial trial on everbearers, results shared with BIOGROW by its recycling partner.<\/p>\n<h2 style=\"text-transform:uppercase\">What the economics say<\/h2>\n<p>In the Tasmanian analysis, new coir in bags for a single season is still the option with the best gross margin, under current assumptions. Reuse options quickly become more attractive if the price of coir goes up.<\/p>\n<p class=\"bgart-source\">Source: <a href=\"https:\/\/www.fruitgrowerstas.org.au\/coir-reuse-project-findings-2026\/\" target=\"_blank\" rel=\"noopener\">Fruit Growers Tasmania \/ RMCG, &#8220;Coir reuse project findings&#8221; (2026)<\/a><\/p>\n<p class=\"bgart-keyphrase\">There is no single right answer for every farm. What decides it is the physical state of the substrate, and above all how much air is left at the bottom of the bag.<\/p>\n<div class=\"bgart-related\">\n<p class=\"bgart-related-label\">And on your farm?<\/p>\n<p>The risks of keeping your bags one more year, and how to limit them on your farm.<\/p>\n<p>    <a class=\"bgart-link\" href=\"https:\/\/bio-grow.com\/en\/agronomy-field\/what-are-the-risks-of-keeping-your-coir-bags-one-more-year\/\">Read the field advice \u2192<\/a>\n  <\/div>\n<p>  <!-- BLOC CONTACT FINAL --><\/p>\n<div style=\"background:linear-gradient(145deg,#004d4e 0%,#006465 55%,#007a7c 100%);border-radius:10px;padding:48px 52px;margin:56px 0 36px;box-shadow:0 10px 40px rgba(0,100,101,.22);\">\n<h2 style=\"text-transform:uppercase;color:#ffffff!important;border-bottom:1px solid rgba(255,255,255,0.22)!important;font-size:20px!important;margin-top:0!important;padding-bottom:16px!important;margin-bottom:26px!important;\">New bags, reuse or Regrow for 2027?<\/h2>\n<p style=\"color:rgba(255,255,255,0.88)!important;font-size:15.5px!important;margin-bottom:18px!important;\">Tell us about your growing system: gutter type, varieties, irrigation strategy. We will look at the options with you, based on your own farm.<\/p>\n<p>    <a href=\"https:\/\/bio-grow.com\/en\/contact-us\/\" style=\"display:inline-block;background:#ffffff;color:#006465!important;text-decoration:none!important;padding:16px 28px;border-radius:5px;font-size:13.5px;font-weight:800;letter-spacing:.06em;text-transform:uppercase;box-shadow:0 4px 18px rgba(0,0,0,.18);font-family:'Poppins',Helvetica,Arial,sans-serif;\">Contact a technical advisor \u2192<\/a>\n  <\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Root Zone No. 1 \u00b7 Strawberry After the last harvest: reuse, recycle or replace your coir bags? Root Zone Strawberry Coir substrate End of season Regrow For many strawberry growers, the end of the season brings back the same question: what to do with the bags? Replant into them, compost them, recycle them, or start [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[56],"tags":[],"class_list":["post-9257","post","type-post","status-publish","format-standard","hentry","category-agronomy-field"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>After the last harvest: reuse, recycle or replace your coir bags? - Biogrow<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/bio-grow.com\/en\/agronomy-field\/after-the-last-harvest-reuse-recycle-or-replace-your-coir-bags\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"After the last harvest: reuse, recycle or replace your coir bags? - Biogrow\" \/>\n<meta property=\"og:description\" content=\"Root Zone No. 1 \u00b7 Strawberry After the last harvest: reuse, recycle or replace your coir bags? Root Zone Strawberry Coir substrate End of season Regrow For many strawberry growers, the end of the season brings back the same question: what to do with the bags? Replant into them, compost them, recycle them, or start [&hellip;]\" \/>\n<meta property=\"og:site_name\" content=\"Biogrow\" \/>\n<meta property=\"article:published_time\" content=\"2026-11-03T08:27:28+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-11-04T08:53:53+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/bio-grow.com\/wp-content\/uploads\/2026\/10\/fraise-grappe-gouttiere-bokeh-large.jpg\" \/>\n<meta name=\"author\" content=\"RORY MERRY\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"RORY MERRY\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/bio-grow.com\\\/en\\\/agronomy-field\\\/after-the-last-harvest-reuse-recycle-or-replace-your-coir-bags\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/bio-grow.com\\\/en\\\/agronomy-field\\\/after-the-last-harvest-reuse-recycle-or-replace-your-coir-bags\\\/\"},\"author\":{\"name\":\"RORY MERRY\",\"@id\":\"https:\\\/\\\/bio-grow.com\\\/en\\\/#\\\/schema\\\/person\\\/02ee7acc5c7bd32d17f79fc4ed030289\"},\"headline\":\"After the last harvest: reuse, recycle or replace your coir bags?\",\"datePublished\":\"2026-11-03T08:27:28+00:00\",\"dateModified\":\"2026-11-04T08:53:53+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/bio-grow.com\\\/en\\\/agronomy-field\\\/after-the-last-harvest-reuse-recycle-or-replace-your-coir-bags\\\/\"},\"wordCount\":729,\"image\":{\"@id\":\"https:\\\/\\\/bio-grow.com\\\/en\\\/agronomy-field\\\/after-the-last-harvest-reuse-recycle-or-replace-your-coir-bags\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/bio-grow.com\\\/wp-content\\\/uploads\\\/2026\\\/10\\\/fraise-grappe-gouttiere-bokeh-large.jpg\",\"articleSection\":[\"Agronomy &amp; field\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/bio-grow.com\\\/en\\\/agronomy-field\\\/after-the-last-harvest-reuse-recycle-or-replace-your-coir-bags\\\/\",\"url\":\"https:\\\/\\\/bio-grow.com\\\/en\\\/agronomy-field\\\/after-the-last-harvest-reuse-recycle-or-replace-your-coir-bags\\\/\",\"name\":\"After the last harvest: reuse, recycle or replace your coir bags? 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