{"id":87411,"date":"2022-06-30T00:00:00","date_gmt":"2022-06-29T22:00:00","guid":{"rendered":"https:\/\/www.growbarato.net\/blog\/botrytis-treatment-step-by-step\/"},"modified":"2026-05-27T11:33:55","modified_gmt":"2026-05-27T09:33:55","slug":"botrytis-treatment-step-by-step","status":"publish","type":"post","link":"https:\/\/www.gbthegreenbrand.com\/blog\/botrytis-treatment-step-by-step\/","title":{"rendered":"Botrytis treatment step by step"},"content":{"rendered":"<p>Marijuana cultivation is a long process that requires dedication and time to achieve good results. However, there are cases where an external pathogen could compromise the harvest despite the grower&#8217;s careful attention. One such case is botrytis in marijuana, which is very common in cannabis plants and equally harmful. In this article, you can find all the necessary information to recognize, prevent, or treat this fungus before it compromises future harvests.<\/p>\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_84 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<label for=\"ez-toc-cssicon-toggle-item-6a20cfc6c1f59\" class=\"ez-toc-cssicon-toggle-label\"><p class=\"ez-toc-title\" style=\"cursor:inherit\">Contenido<\/p>\n<span class=\"ez-toc-cssicon\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-6a20cfc6c1f59\"  \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.gbthegreenbrand.com\/blog\/botrytis-treatment-step-by-step\/#What_is_botrytis\" >What is botrytis?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.gbthegreenbrand.com\/blog\/botrytis-treatment-step-by-step\/#How_to_recognize_botrytis\" >How to recognize botrytis?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.gbthegreenbrand.com\/blog\/botrytis-treatment-step-by-step\/#Botrytis_in_outdoor_cultivation\" >Botrytis in outdoor cultivation<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.gbthegreenbrand.com\/blog\/botrytis-treatment-step-by-step\/#Botrytis_in_indoor_cultivation\" >Botrytis in indoor cultivation<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.gbthegreenbrand.com\/blog\/botrytis-treatment-step-by-step\/#How_to_prevent_botrytis\" >How to prevent botrytis?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.gbthegreenbrand.com\/blog\/botrytis-treatment-step-by-step\/#Pruning\" >Pruning<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.gbthegreenbrand.com\/blog\/botrytis-treatment-step-by-step\/#Using_fungicides_as_preventatives\" >Using fungicides as preventatives<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.gbthegreenbrand.com\/blog\/botrytis-treatment-step-by-step\/#Treatment_against_botrytis\" >Treatment against botrytis<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.gbthegreenbrand.com\/blog\/botrytis-treatment-step-by-step\/#Should_infected_buds_be_consumed\" >Should infected buds be consumed?<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_is_botrytis\"><\/span>What is botrytis?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p>&#8220;Botrytis cinerea&#8221; is one of the most harmful fungi that can attack marijuana. It is also called gray mold because it manifests as a whitish cotton-like substance, turning grayish and brownish over time. Furthermore, it is <strong>very difficult to detect,<\/strong> becoming visible weeks after its arrival in the crop and being capable of ruining the entire harvest.<\/p>\n\n<p>Although it can attack at any stage of cultivation, it most often does so during the flowering stage, when the buds are already formed. This is because <strong>botrytis is a fungus<\/strong> that appears in areas with high humidity, entering the marijuana flowers and spreading rapidly.<\/p>\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_to_recognize_botrytis\"><\/span>How to recognize botrytis?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p>Since botrytis is usually detected late, the best option is to prevent it. To do this, you must be clear about the situations in which botrytis is most frequent. In addition, periodic checks of the marijuana plants will also help us <strong>detect the problem in time before it spreads<\/strong> throughout the entire harvest. To identify this fungus, look for brown spots, irregularities on the stem, small leaves on formed buds that suddenly dry out and die, dehydrated leaves, or flowers that have grayish cottony layers.<\/p>\n\n<p>The main attraction for the arrival of this fungus is high humidity. Outdoors, botrytis <strong>appears in rainy areas<\/strong>, humid climates, or where there are no air currents. Therefore, you must take into account where you are growing to act accordingly. Seed selection is also <strong>very important for growing plants<\/strong> that better withstand the conditions of the area or that have high defenses against these pathogens.<\/p>\n\n<p>Therefore, if you grow outdoors and storms or several days of humidity are expected, it is also important to know <a href=\"https:\/\/www.growbarato.net\/blog\/?p=232532\" data-type=\"link\" data-id=\"https:\/\/www.growbarato.net\/blog\/como-proteger-las-plantas-de-la-lluvia\/\" target=\"_blank\" rel=\"noopener\">how to protect plants from rain<\/a> before the buds accumulate too much water.<\/p>\n\n<p>In any case, there are quite clear signs, both for indoor and outdoor cultivation, to identify botrytis. Some examples are shown below.<\/p>\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"450\" src=\"https:\/\/www.growbarato.net\/blog\/wp-content\/uploads\/2022\/07\/tratamiento-botrytis.jpg\" alt=\"Tratamiento botrytis\" class=\"wp-image-145136\" srcset=\"https:\/\/www.gbthegreenbrand.com\/blog\/wp-content\/uploads\/2022\/07\/tratamiento-botrytis.jpg 1000w, https:\/\/www.gbthegreenbrand.com\/blog\/wp-content\/uploads\/2022\/07\/tratamiento-botrytis-300x135.jpg 300w, https:\/\/www.gbthegreenbrand.com\/blog\/wp-content\/uploads\/2022\/07\/tratamiento-botrytis-768x346.jpg 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n<\/div>\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Botrytis_in_outdoor_cultivation\"><\/span><strong>Botrytis in outdoor cultivation<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<p>In outdoor crops, the phase most susceptible to contagion by the botrytis fungus is the last <strong>15\u201320 days before harvest,<\/strong> when plants usually have well-formed and dense buds. Since the flowers are almost mature, they usually have little air circulation inside; therefore, if they get wet from rain, we will have to monitor their condition very closely.<\/p>\n\n<p>It is usually considered normal to lose 5\u201310% of an outdoor harvest due to this fungus, as it is <strong>very present in nature<\/strong>. It should be remembered that it is best to detect and remove any affected part before the drying and curing phase, as the affected parts can spread very quickly in the following days.<\/p>\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Botrytis_in_indoor_cultivation\"><\/span><strong>Botrytis in indoor cultivation<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<p>Regarding indoor cultivation, it is advisable to leave <strong>space between plants,<\/strong> avoid leaves sticking to each other, and have proper control of humidity and temperature. In addition, the <strong>presence of fans or air conditioners<\/strong> will help prevent this fungus.<\/p>\n\n<p>Finally, botrytis can also <strong>appear during drying<\/strong>, so it is essential not to place the buds too close to each other to promote airflow. It is also common during curing if we do not ensure that the flowers are dry when putting them into the chosen containers.<\/p>\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_to_prevent_botrytis\"><\/span><strong>How to prevent botrytis?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p>Once the presence of botrytis in the marijuana crop is recognized, it is advisable to take measures as soon as possible to prevent it from spreading throughout the entire crop. While it is said that it is <strong>better to prevent than to cure,<\/strong> in this case, the saying could not be more accurate.<\/p>\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Pruning\"><\/span><strong>Pruning<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<p>One of the recommended tricks to avoid the arrival of any fungus as much as possible is to perform <strong>apical pruning<\/strong>. With this, the central bud (which is the most sought after by botrytis in marijuana) is divided into several smaller ones, so they <strong>contain less humidity<\/strong> and are better aerated.<\/p>\n\n<p>On the other hand, it is also favorable to apply <strong><a href=\"https:\/\/www.growbarato.net\/blog\/en\/lollipop-pruning-technique\/\" target=\"_blank\" rel=\"noopener\">lollipop pruning<\/a><\/strong>. The lower branches of the cannabis plant are usually the ones that absorb the most humidity, as they do not receive as much sun and air as the upper ones. Therefore, if pruned, <strong>humidity in the plants is reduced<\/strong> and, in addition, <strong>production is maximized<\/strong> in the upper part.<\/p>\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Using_fungicides_as_preventatives\"><\/span><strong>Using fungicides as preventatives<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<p>Expert growers have been saying for years that, as the popular saying goes, it is <strong>better to prevent than to cure<\/strong>. Therefore, the application of preventative fungicides from the plant&#8217;s growth phase will be of great help so we do not have to worry about the arrival of pathogens that destroy our harvest.<\/p>\n\n<p>A great option is <a href=\"https:\/\/www.growbarato.net\/insecticidas-boom-nutrients\/5191-fungi-boom.html\" target=\"_blank\" rel=\"noopener\"><strong>Fungi Boom<\/strong><\/a>, a completely natural product made from <strong>horsetail, silicon, and equisetonin<\/strong>, compounds that are highly toxic to fungi and prevent their appearance. In addition, it can be used as a preventative and as a curative treatment.<\/p>\n\n<p>On the other hand, you can also use <strong>more economical homemade treatments<\/strong> to avoid it, such as Neem oil, milk (skimmed + water), or a garlic fungicide (mixed with boiling water).<\/p>\n\n<p>[ppgbo product=&#8221;5191&#8243; language=&#8221;en&#8221;]<\/p>\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Treatment_against_botrytis\"><\/span><strong>Treatment against botrytis<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p>The truth is that, in most situations, once botrytis is discovered in marijuana, it is already <strong>too late to act<\/strong>. In case of having detected it in time, and taking into account that it usually appears in the flowering stage, the only solution is to <strong>cut the branch 5 or 10 centimeters below the affected bud<\/strong>. This process must be carried out carefully, as a sudden movement in the calyxes can <strong>transport the spores to the rest of the crop<\/strong>. In fact, it is advisable to cover the infected area with a <strong>trash bag<\/strong> to prevent the traffic of these cells.<\/p>\n\n<p>From that moment on, you must have <strong>exhaustive control of humidity<\/strong> in the drying and curing processes, as it is possible that there are inactive spores in the healthy buds and, as conditions become favorable again, <strong>botrytis can develop again<\/strong>.<\/p>\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Should_infected_buds_be_consumed\"><\/span><strong>Should infected buds be consumed?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<p>It is very common that, after months of dedication, botrytis infects the crop in its final phase. This leads many people, <strong>driven by the desperation<\/strong> of having worked in vain, to wonder if these buds can and should be consumed. <strong>The answer is clear: no<\/strong>. The introduction of fungal spores into our lungs can cause serious health problems such as <strong>pneumonia or aspergillosis<\/strong>.<\/p>\n\n<p>In many Internet forums, it is said that if you <strong>dry the buds in the sun<\/strong>, the botrytis will go away. Other people say that these flowers can be used for <strong>extractions<\/strong>. <strong>Nothing could be further from the truth<\/strong>. If botrytis has infected the buds, <strong>they must be disposed of immediately<\/strong>. This experience will help you be more careful and preventative in future harvests, but <strong>you should never gamble with your own health<\/strong>.<\/p><div style='text-align:center' class='yasr-auto-insert-visitor'><\/div>","protected":false},"excerpt":{"rendered":"<p>Marijuana cultivation is a long process that requires dedication and time to achieve good results. However, there are cases where an external pathogen could compromise the harvest despite the grower&#8217;s careful attention. One such case is botrytis in marijuana, which is very common in cannabis plants and equally harmful. In this article, you can find\u2026 <span class=\"leermas\" onclick=\"window.location.href='https:\/\/www.gbthegreenbrand.com\/blog\/botrytis-treatment-step-by-step\/'\">Continue reading<\/span ><\/p>\n","protected":false},"author":18,"featured_media":145132,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"wprm-recipe-roundup-name":"","wprm-recipe-roundup-description":"","yasr_overall_rating":0,"yasr_post_is_review":"","yasr_auto_insert_disabled":"","yasr_review_type":"","footnotes":""},"categories":[253,10,285],"tags":[],"class_list":["post-87411","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tips-on-how-to-grow","category-consejos-sobre-como-cultivar","category-tips"],"yasr_visitor_votes":{"stars_attributes":{"read_only":false,"span_bottom":false},"number_of_votes":2,"sum_votes":10},"_links":{"self":[{"href":"https:\/\/www.gbthegreenbrand.com\/blog\/wp-json\/wp\/v2\/posts\/87411","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.gbthegreenbrand.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.gbthegreenbrand.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.gbthegreenbrand.com\/blog\/wp-json\/wp\/v2\/users\/18"}],"replies":[{"embeddable":true,"href":"https:\/\/www.gbthegreenbrand.com\/blog\/wp-json\/wp\/v2\/comments?post=87411"}],"version-history":[{"count":13,"href":"https:\/\/www.gbthegreenbrand.com\/blog\/wp-json\/wp\/v2\/posts\/87411\/revisions"}],"predecessor-version":[{"id":232573,"href":"https:\/\/www.gbthegreenbrand.com\/blog\/wp-json\/wp\/v2\/posts\/87411\/revisions\/232573"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.gbthegreenbrand.com\/blog\/wp-json\/wp\/v2\/media\/145132"}],"wp:attachment":[{"href":"https:\/\/www.gbthegreenbrand.com\/blog\/wp-json\/wp\/v2\/media?parent=87411"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.gbthegreenbrand.com\/blog\/wp-json\/wp\/v2\/categories?post=87411"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.gbthegreenbrand.com\/blog\/wp-json\/wp\/v2\/tags?post=87411"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}