{"id":11925,"date":"2024-07-23T08:00:56","date_gmt":"2024-07-23T12:00:56","guid":{"rendered":"https:\/\/www.veriheal.com\/blog\/?p=11925"},"modified":"2025-10-10T11:44:25","modified_gmt":"2025-10-10T15:44:25","slug":"plant-growth-regulators","status":"publish","type":"post","link":"https:\/\/www.veriheal.com\/blog\/growing-cannabis\/plant-growth-regulators\/","title":{"rendered":"What Is PGR Weed and How Do You Spot It?"},"content":{"rendered":"<p>\u200bWith PGR weed growing in popularity, staying safe is the highest priority.<\/p>\r\n<p><span style=\"font-weight: 400;\">PGR weed is grown with plant growth regulators to produce higher yields and fatter nugs. However, these potential benefits come at the risk of compromising flavor, visual appearance, and more extreme health effects.\u00a0<\/span><\/p>\r\n<h2 id=\"what-is-pgr-cannabis\">What is PGR Weed?<\/h2>\r\n<p><span style=\"font-weight: 400;\">PGR weed is cannabis flower grown with plant growth regulators to boost yield and nug size. PGRs, or Plant Growth Regulators, are any substances, fertilizers, or mixtures that can be used to speed up or slow down the growth rate in plants and food crops by targeting physiological actions that then change the natural behavior of the plant. The main function of PGRs is to mimic or inhibit the plant\u2019s normal growth hormones during the growth cycles.\u00a0<\/span><\/p>\r\n<p><span style=\"font-weight: 400;\">PGRs can have an impact on when fruits ripen and also on the length, width, and shape of the plant\u2019s roots, stems, trichomes, and leaves. It\u2019s time consumers start asking the right questions to ensure not only the best value for their money but, more importantly, to minimize health risks.<\/span><\/p>\r\n<p><span style=\"font-weight: 400;\">For cannabis, PGRs are likely commonly used to increase the plant\u2019s health and resistance to fungus but often at a cost of flavor and visual appearance. More extreme risks of PGR cannabis include risks of organ damage, cancer, and infertility. They can also cause more minor health effects, like skin or eye irritation.<\/span><\/p>\r\n<h3><strong>Types of Synthetic PGRs Used While Growing Weed<\/strong><\/h3>\r\n<p><span style=\"font-weight: 400;\">When you see the words synthetic before anything, you should already be approaching with caution. Synthetic means that it was man-made using chemicals, compounds, or materials that imitate natural products for human consumption. If we have learned anything at all about the difference between synthetic and organic products is that the synthetic versions are often accompanied by less effective as well as adverse or undesired side effects. With that in mind, let\u2019s have a look at some of the synthetic PGRs on the market:<\/span><\/p>\r\n<ul>\r\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Paclobutrazol<\/span><\/li>\r\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Daminozide<\/span><\/li>\r\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Chlormequat Chloride<\/span><\/li>\r\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">In a not-so-unexpected shift of events, these synthetic PGRs are bad for our environment. Additionally, the Environmental Protection Agency (EPA) recently identified daminozide as a probable carcinogen.<\/span><\/li>\r\n<\/ul>\r\n<p><span style=\"font-weight: 400;\">The residual PGRs in the soil and water can cause some serious damage to the fish and waterways. Additionally, growing cannabis has been known to boost biodiversity in the soil but when synthetic plant growth regulators are used, biodiversity becomes negatively impacted.<\/span><\/p>\r\n<h3><strong>Regulatory Status of PGRs<\/strong><\/h3>\r\n<ul>\r\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Discuss the legal status and regulatory concerns regarding these chemicals, including bans and health warnings.<\/span><\/li>\r\n<\/ul>\r\n<h3><strong>Impact on Cannabis<\/strong><\/h3>\r\n<p><span style=\"font-weight: 400;\">How is it that PGRs can have such an impact on buds? Well, simply put, the PGRs have an impact on the phytohormones-which are the plants\u2019 hormones. These phytohormones play a key role in the growth and development of the plant. The plants\u2019 hormones are also regulated naturally through environmental cues, receptors, and genome. The five major phytohormone classes include gibberellin, auxin, cytokinin, ethylene, and abscisic acid. PGRs are used to manipulate those hormones.\u00a0<\/span><\/p>\r\n<p><\/p>\r\n<p>The growth process is divided into stages where each of these hormones serves an important purpose.<\/p>\r\n<p>\r\n\r\n<\/p>\r\n<figure class=\"wp-block-table\">\r\n<table class=\"has-fixed-layout\">\r\n<thead>\r\n<tr>\r\n<th>Phytohormone<\/th>\r\n<th>Growth Stage<\/th>\r\n<\/tr>\r\n<\/thead>\r\n<tbody>\r\n<tr>\r\n<td>Gibberellin<\/td>\r\n<td>Gibberellin impacts the most during the germination, growth to maturity, and flowering stages with less of an impact, but still an impact, on the fruit development stage.\u00a0<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Auxin &amp; Cytokinin<\/td>\r\n<td>Auxin and Cytokinin impact the most during the growth, maturity, flowering, and fruit development stages.\u00a0<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Ethylene<\/td>\r\n<td>Ethylene impacts the most during the flowering and fruit development stages and then again after the seed dormancy stage in the abscission stage.<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Abscisic Acid<\/td>\r\n<td>Abscisic acid (ABA) impacts the most during seed dormancy and abscission (when ripe fruit drops).\u00a0<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/figure>\r\n<p>\r\n\r\n<\/p>\r\n<h2 id=\"how-to-identify\"><strong>How Do You Spot PGR Cannabis?<\/strong><\/h2>\r\n<p>Though PGR cannabis is impossible to spot without proper chemical testing, there are a few tell-tale signs to flag for at <a href=\"https:\/\/www.veriheal.com\/blog\/cannabis-dispensary-etiquette-101-what-you-should-and-shouldnt-do\/\">your local dispensaries.<\/a><\/p>\r\n<h3><strong>Appearance<\/strong><\/h3>\r\n<p>Cannabis plants grown with PGRs are super dense and tightly curled. PGR buds will be elongated and feel thicker than healthy, leafy buds, with a spongy consistency. They\u2019re also rock hard, so they\u2019ll feel weighted than healthy nugs.Also, PGR cannabis will have more brown and red hairs than naturally-grown cannabis. Coupled with the yellow-brown <a href=\"https:\/\/www.veriheal.com\/blog\/trichomes-the-key-that-controls-cannabis-potency\/\">trichomes<\/a> typical of PGR weed, the red and brown hairs will cause the flower to have a duller, orange or brown appearance.<\/p>\r\n<h3><strong>Texture and Smell<\/strong><\/h3>\r\n<p>Not only are the trichomes a yellow-brown color, but there are also fewer trichomes on PGR cannabis. Because trichomes produce the plant\u2019s<a href=\"https:\/\/www.veriheal.com\/blog\/understanding-cannabis-terpenes-and-their-effects\/\"> terpenes<\/a>, PGR weed will have a weaker smell compared to natural cannabis.\u00a0<\/p>\r\n<p>These nugs will also feel either spongey and wet or extremely dense and rock hard.\u00a0<\/p>\r\n<h3><strong>Taste and Effects\u00a0<\/strong><\/h3>\r\n<p>Because of the lack of trichomes on PGR weed, the plant carries less terpenes and cannabinoids. As such, this type of weed typically has a harsher, chemical-like flavor.<\/p>\r\n<p>Generally, PGR weed also has a lower CBD and THC content than other cannabis products, as these cannabinoids are also produced in the trichomes of the plant. To make matters worse, the synthetic chemicals used in the PGR process disrupts the production of the plant\u2019s cannabinoids, further diminishing its effects.\u00a0<\/p>\r\n<h2 id=\"is-pgr-weed-safe\"><strong>Is PGR Weed Safe to Use?<\/strong><\/h2>\r\n<h3><strong>Health Concerns<\/strong><\/h3>\r\n<p><span style=\"font-weight: 400;\">Consuming cannabis grown with PGRs poses several health risks due to the harmful chemicals involved. These risks include carcinogenic effects, toxicity to vital organs, respiratory issues, and potential endocrine disruption. In particular, some plant growth regulators have been found to <\/span><a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/30168961\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">affect reproductive function in humans and animals<\/span><\/a><span style=\"font-weight: 400;\">.\u00a0<\/span><\/p>\r\n<p><span style=\"font-weight: 400;\">Chronic exposure to PGRs can also <\/span><a href=\"https:\/\/link.springer.com\/article\/10.1007\/BF01061103\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">weaken the immune system<\/span><\/a><span style=\"font-weight: 400;\"> and reduce the therapeutic efficacy of cannabis by altering its cannabinoid and terpene profiles.<\/span><\/p>\r\n<h3><strong>Consumer Safety<\/strong><\/h3>\r\n<p><span style=\"font-weight: 400;\">To avoid the risks of PGR cannabis, it\u2019s best to avoid this type of weed altogether. The best way to ensure you\u2019re consuming safe cannabis is to purchase from a licensed dispensary that provides a certificate of analysis with their products. A certificate of analysis can not only show the cannabinoid and terpene profile for the product you\u2019re consuming, it also details how the product was tested before hitting the shelves \u2013 including whether or not the flower was texted for toxins and other pollutants.<\/span><\/p>\r\n<h2>PGR Weed vs Natural<\/h2>\r\n<h3><strong>Comparison with Natural Cannabis<\/strong><\/h3>\r\n<div class=\"flex flex-grow flex-col max-w-full\">\r\n<div class=\"min-h-[20px] text-message flex flex-col items-start whitespace-pre-wrap break-words [.text-message+&amp;]:mt-5 juice:w-full juice:items-end overflow-x-auto gap-2\" dir=\"auto\" data-message-author-role=\"assistant\" data-message-id=\"8dcd2636-8cb2-460d-971e-3e0ba374f9e8\">\r\n<div class=\"flex w-full flex-col gap-1 juice:empty:hidden juice:first:pt-[3px]\">\r\n<div class=\"markdown prose w-full break-words dark:prose-invert light\">\r\n<p>While PGR-treated cannabis often offers higher yields and more visually appealing buds, consuming PGR weed can pose significant health risks due to the potential presence of carcinogenic and toxic chemicals. Plus, the plant growth regulation process alters the natural cannabinoid and terpene profiles of the cannabis flower, which can reduce the therapeutic and medical efficacy of the weed, as well as the flavor, aroma, and texture.\u00a0<\/p>\r\n<p>In contrast, naturally grown cannabis is generally free from harmful synthetic chemicals, especially when it is purchased from a trusted source. Though it may produce lower yields and less aesthetically uniform nugs, naturally grown cannabis retains its rich cannabinoid and terpene profile. Not only does this natural profile mean better-tasting weed, but it can also provide stronger therapeutic benefits and richer, more balanced effects overall.\u00a0<\/p>\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n<h3><strong>Advantages of Natural Growing Practices<\/strong><\/h3>\r\n<p>Naturally grown cannabis is significantly better for the environment compared to PGR-treated cannabis. By avoiding synthetic chemicals, natural cultivation promotes healthier soil, reduces harmful runoff, and supports local water quality.<\/p>\r\n<p>Plus, organic farming practices can protect local ecosystems and promote sustainable energy use \u2013 ultimately reducing the carbon footprint and energy consumption associated with commercial cannabis grows.<\/p>\r\n<p>Overall, naturally grown cannabis not only minimizes pollution but ultimately ensures a healthier, cleaner, and more balanced ecosystem among plants.<\/p>\r\n<h2>Conclusion<\/h2>\r\n<p>Overall, though PGR weed may produce uniform nugs and higher yields, dangerous synthetic chemicals can pose serious health risks and lead to weaker, less flavorful cannabis.\u00a0<\/p>\r\n<p>To ensure you&#8217;re using cannabis safely in a way that is best for you, <a href=\"https:\/\/www.veriheal.com\/find-a-medical-marijuana-doctor\/\" target=\"_blank\" rel=\"noopener\">consult with a medical marijuana doctor<\/a>. Having your med card can open doors to a number of benefits &#8212; from tax breaks to enhanced legal protection &#8212; but it is ultimately the key to ensuring you&#8217;re making the best decisions for your health and your individual symptoms while ensuring easy access to safe medical cannabis.\u00a0<\/p>\r\n<h2>FAQs on PGR weed<\/h2>\r\n<h3><strong>What does PGR do to weed?<\/strong><\/h3>\r\n<p>PGRs or plant growth regulators can increase cannabis yield and lead to bigger nugs. However, it can also weaken the effects, flavor, and aroma of weed.\u00a0<\/p>\r\n<h3><strong>What is the difference between PGR weed and real weed?<\/strong><\/h3>\r\n<p>PGR weed is grown with plant growth regulators, which can make for more uniform bud, but also can weaken the cannabinoid and terpene profile of the natural plant. In contrast, naturally grown cannabis keeps its terpene and cannabinoid profile, leading to a richer, more balanced, and overall safer experience.<\/p>\r\n<h3><strong>Is PGR harmful?<\/strong><\/h3>\r\n<p>Yes, PGR weed can lead to serious health risks such as liver toxicity, lowered immune system, or even cancer.\u00a0<\/p>\r\n<h3><strong>Is PGR weed illegal?<\/strong><\/h3>\r\n<p>While PGRs are banned for use on food crops in many areas,\u00a0 some cultivators still use them for cannabis growth, as there are no laws explicitly restricting them in the cannabis industry.<\/p>\r\n<h3><strong>What does PGR cannabis do to the body?<\/strong><\/h3>\r\n<p><span style=\"font-weight: 400;\">Consuming PGR weed <\/span><span style=\"font-weight: 400;\">poses several health risks due to the harmful chemicals involved. These risks include carcinogenic effects, toxicity to vital organs, respiratory issues, and potential endocrine disruption.<\/span><\/p>\r\n<hr \/>\r\n<h2><strong>Citations:<\/strong><\/h2>\r\n<p>1. National Toxicology Program. NTP Technical Report on the Toxicity Study of<br \/>Chitosan (CASRN 9012-76-4) Administered in Feed to Sprague Dawley<br \/>[Crl:CD(SD)] Rats: Toxicity Report 93 [Internet]. Research Triangle Park (NC):<br \/>National Toxicology Program; 2017 Dec. Introduction.<\/p>\r\n<p>2. https:\/\/www3.epa.gov\/pesticides\/chem_search\/reg_actions\/reregistration\/fs_PC-<br \/>035101_1-Sep-93.pdf<\/p>\r\n<p>3. Xu, C. S., Jiang, Z., Shen, W., &amp;amp; Zou, S. H. (2018). Zhonghua nan ke xue =<br \/>National journal of andrology, 24(4), 370\u2013375.<\/p>\r\n<p>4. Pang, Q., Chen, X., Lv, J., Li, T., Fang, J., &amp;amp; Jia, H. (2020). Triacontanol<br \/>Promotes the Fruit Development and Retards Fruit Senescence in Strawberry: A<br \/>Transcriptome Analysis. Plants (Basel, Switzerland), 9(4), 488<\/p>\r\n<p>5. Ali, O., Ramsubhag, A., &amp;amp; Jayaraman, J. (2021). Biostimulant Properties of<br \/>Seaweed Extracts in Plants: Implications towards Sustainable Crop Production.<br \/>Plants (Basel, Switzerland), 10(3), 531. https:\/\/doi.org\/10.3390\/plants10030531<\/p>\r\n<p>6. Gupta, R., &amp;amp; Chakrabarty, S. K. (2013). Gibberellic acid in plant: still a mystery<br \/>unresolved. Plant signaling &amp;amp; behavior, 8(9), e25504.<br \/>https:\/\/doi.org\/10.4161\/psb.25504<\/p>\r\n<p>7. Khadr, A., Wang, G. L., Wang, Y. H., Zhang, R. R., Wang, X. R., Xu, Z. S., Tian,<br \/>Y. S., &amp;amp; Xiong, A. S. (2020). Effects of auxin (indole-3-butyric acid) on growth<br \/>characteristics, lignification, and expression profiles of genes involved in lignin<br \/>biosynthesis in carrot taproot. PeerJ, 8, e10492.<\/p>\r\n<p>8. Corbineau, F., Xia, Q., Bailly, C., &amp;amp; El-Maarouf-Bouteau, H. (2014). Ethylene, a<br \/>key factor in the regulation of seed dormancy. Frontiers in plant science, 5, 539.<\/p>\r\n<p>9. Gupta, K., Wani, S. H., Razzaq, A., Skalicky, M., Samantara, K., Gupta, S.,<br \/>Pandita, D., Goel, S., Grewal, S., Hejnak, V., Shiv, A., El-Sabrout, A. M.,<br \/>Elansary, H. O., Alaklabi, A., &amp;amp; Brestic, M. (2022). Abscisic Acid: Role in Fruit<br \/>Development and Ripening. Frontiers in plant science, 13, 817500.<\/p>\r\n\r\n\r\n","protected":false},"excerpt":{"rendered":"<p>\u200bWith PGR weed growing in popularity, staying safe is the highest priority. PGR weed is grown with plant growth regulators to produce higher yields and fatter nugs. However, these potential benefits come at the risk of compromising flavor, visual appearance, and more extreme health effects.\u00a0 What is PGR Weed? PGR weed is cannabis flower grown&#8230;<\/p>\n","protected":false},"author":49,"featured_media":35078,"parent":2687,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[15362,259],"tags":[3480,1812,1811,16515,16517,16516],"class_list":["post-11925","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-guides","category-research","tag-cannabis-grow","tag-cultivation","tag-growing","tag-pgr-weed","tag-pgrs","tag-plant-growth-regulators"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.1 (Yoast SEO v26.1.1) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>PGR Weed Explained | How to Identify It Safely<\/title>\n<meta name=\"description\" content=\"Discover how to identify PGR weed, understand its risks, and choose safe, natural cannabis for a better experience.\" \/>\n<meta name=\"robots\" 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