{"id":14789,"date":"2023-12-07T13:54:15","date_gmt":"2023-12-07T16:54:15","guid":{"rendered":"https:\/\/www.lawnstarter.com\/blog\/?p=14789"},"modified":"2025-02-24T16:13:17","modified_gmt":"2025-02-24T19:13:17","slug":"natural-weed-killers-a-guide-to-organic-herbicides","status":"publish","type":"post","link":"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/natural-weed-killers-a-guide-to-organic-herbicides\/","title":{"rendered":"Organic Herbicides: A Comprehensive Guide"},"content":{"rendered":"<p>Organic herbicides offer a natural alternative to conventional products. They use plant- or mineral-based components to control unwanted weeds and vegetation.&nbsp;<\/p>    <p>Natural weed killers use active ingredients such as acetic acid, citric acid, or essential oils to target weeds in eco-friendly ways. They work by desiccating plant cells, disrupting cellular membranes, or inhibiting root formation, making them sustainable lawn care solutions.<\/p>    <p>As a plant and soil scientist and a homeowner of 20-plus years, I have experience with all types of herbicides. I\u2019ll share my insights and how I tackled a dandelion and thistle invasion.<\/p>   <div class=\"wp-block-ub-table-of-contents-block ub_table-of-contents\" id=\"ub_table-of-contents-ce2ce673-9510-4174-b896-dc01cef141da\" data-linktodivider=\"false\" data-showtext=\"show\" data-hidetext=\"hide\" data-scrolltype=\"auto\" data-enablesmoothscroll=\"false\" data-initiallyhideonmobile=\"false\" data-initiallyshow=\"true\"><div class=\"ub_table-of-contents-header-container\" style=\"\"> \t\t\t<div class=\"ub_table-of-contents-header\" style=\"text-align: left; \"> \t\t\t\t<div class=\"ub_table-of-contents-title\"><\/div> \t\t\t\t \t\t\t<\/div> \t\t<\/div><div class=\"ub_table-of-contents-extra-container\" style=\"\"> \t\t\t<div class=\"ub_table-of-contents-container ub_table-of-contents-1-column\"> \t\t\t\t<ul style=\"\"><li style=\"\"><a href=\"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/natural-weed-killers-a-guide-to-organic-herbicides\/#0-organic-herbicides-list\" style=\"\">Organic Herbicides List<\/a><\/li><li style=\"\"><a href=\"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/natural-weed-killers-a-guide-to-organic-herbicides\/#1-what-are-organic-herbicides\" style=\"\">What Are Organic Herbicides?<\/a><\/li><li style=\"\"><a href=\"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/natural-weed-killers-a-guide-to-organic-herbicides\/#2-how-do-organic-herbicides-work\" style=\"\">How Do Organic Herbicides Work?<\/a><ul><li style=\"\"><a href=\"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/natural-weed-killers-a-guide-to-organic-herbicides\/#3-organic-herbicide-active-ingredients\" style=\"\">Organic Herbicide Active Ingredients<\/a><\/li><li style=\"\"><a href=\"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/natural-weed-killers-a-guide-to-organic-herbicides\/#4-how-organic-herbicides-work-in-plants\" style=\"\">How Organic Herbicides Work in Plants<\/a><\/li><\/ul><\/li><li style=\"\"><a href=\"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/natural-weed-killers-a-guide-to-organic-herbicides\/#5-types-of-organic-herbicides\" style=\"\">Types of Organic Herbicides<\/a><ul><li style=\"\"><a href=\"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/natural-weed-killers-a-guide-to-organic-herbicides\/#6-pre-emergent-vs-post-emergent-herbicides\" style=\"\">Pre-Emergent vs. Post-Emergent Herbicides<\/a><\/li><li style=\"\"><a href=\"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/natural-weed-killers-a-guide-to-organic-herbicides\/#7-contact-vs-systemic-herbicides\" style=\"\">Contact vs. Systemic Herbicides<\/a><\/li><li style=\"\"><a href=\"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/natural-weed-killers-a-guide-to-organic-herbicides\/#8-selective-vs-non-selective-herbicides\" style=\"\">Selective vs. Non-Selective Herbicides<\/a><\/li><\/ul><\/li><li style=\"\"><a href=\"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/natural-weed-killers-a-guide-to-organic-herbicides\/#9-homemade-organic-weed-killers\" style=\"\">Homemade Organic Weed Killers<\/a><ul><li style=\"\"><a href=\"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/natural-weed-killers-a-guide-to-organic-herbicides\/#10-vinegar\" style=\"\">Vinegar<\/a><\/li><li style=\"\"><a href=\"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/natural-weed-killers-a-guide-to-organic-herbicides\/#12-boiling-water\" style=\"\">Boiling Water<\/a><\/li><\/ul><\/li><li style=\"\"><a href=\"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/natural-weed-killers-a-guide-to-organic-herbicides\/#13-tips-for-using-organic-herbicides\" style=\"\">Tips for Using Organic Herbicides<\/a><\/li><li style=\"\"><a href=\"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/natural-weed-killers-a-guide-to-organic-herbicides\/#14-faq-about-organic-herbicides\" style=\"\">FAQ About Organic Herbicides<\/a><\/li><\/ul> \t\t\t<\/div> \t\t<\/div><\/div>   <h2 class=\"wp-block-heading\" id=\"0-organic-herbicides-list\">Organic Herbicides List<\/h2>    <p>While the market is saturated with conventional herbicides, it offers significantly fewer organic herbicides. If you\u2019re looking to implement eco-friendly <a href=\"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/guide-weed-control-yard\/\">weed control in your yard<\/a>, the following list includes some of the best organic weed killer products on the market.<\/p>   <p><script src=\"https:\/\/api.tablelabs.com\/t\/ftoynuju.js\" defer><\/script><\/p>    <h2 class=\"wp-block-heading\" id=\"1-what-are-organic-herbicides\">What Are Organic Herbicides?<\/h2>    <p>To understand organic herbicides, it\u2019s best to first understand herbicides in general.<\/p>    <p><strong>Herbicides<\/strong> are chemical compounds used to kill or inhibit the growth of unwanted weeds. These products are classified as organic or inorganic based on the compounds they contain.<\/p>    <p><strong>Organic herbicides <\/strong>are designed to control vegetation without using synthetic chemicals as active ingredients. Organic weed control products rely on naturally occurring actives, making them ideal for eco-friendly lawn care.&nbsp;<\/p>    <p>Inorganic herbicides use synthetic chemicals to kill weeds or other plants. Compared to organic herbicides, conventional products may pose more risks.&nbsp;<\/p>    <p><em>Note: Even though organic herbicides are made from naturally occurring components, they aren\u2019t without dangers. <\/em><strong><em>All herbicides pose risks<\/em><\/strong><em> to the applicator, surrounding plants, soil health, and nearby water sources when misapplied. Regardless of your product, always take appropriate safety precautions and follow label directions.<\/em><\/p>    <h2 class=\"wp-block-heading\" id=\"2-how-do-organic-herbicides-work\">How Do Organic Herbicides Work?<\/h2>    <figure class=\"wp-block-image aligncenter size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"600\" src=\"https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2023\/08\/cornmeal-1.jpg\" alt=\"corn gluten meal fertilizer\" class=\"wp-image-97177\" srcset=\"https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2023\/08\/cornmeal-1.jpg 800w, https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2023\/08\/cornmeal-1-300x225.jpg 300w, https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2023\/08\/cornmeal-1-646x485.jpg 646w, https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2023\/08\/cornmeal-1-150x113.jpg 150w, https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2023\/08\/cornmeal-1-768x576.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\"><em>Corn Gluten<\/em><br>Photo Credit: <a href=\"https:\/\/www.flickr.com\/photos\/phuthinhco\/7604800074\" target=\"_blank\" rel=\"noreferrer noopener\">Phu Thinh Co<\/a> \/ Flickr \/ <a href=\"https:\/\/creativecommons.org\/licenses\/by-sa\/2.0\/\" target=\"_blank\" rel=\"noreferrer noopener\">CC BY-SA 2.0<\/a><\/figcaption><\/figure>    <p>At the fundamental level, natural weed killers use plant- or mineral-based active ingredients to disrupt biological processes within the cells of targeted plants, thereby affecting growth and killing vegetation.<\/p>    <h3 class=\"wp-block-heading\" id=\"3-organic-herbicide-active-ingredients\">Organic Herbicide Active Ingredients<\/h3>    <p>The National Pesticide Information Center claims <a href=\"https:\/\/npic.orst.edu\/pest\/weeds.html\" target=\"_blank\" rel=\"noreferrer noopener\">hundreds of different herbicides<\/a> are available for agricultural, horticultural, landscape, or garden settings. Unfortunately, the list of <a href=\"https:\/\/www.agdaily.com\/technology\/the-list-of-pesticides-approved-for-organic-production\/\" target=\"_blank\" rel=\"noreferrer noopener\">approved organic herbicides<\/a> represents only a small percentage of the available products because they contain fewer natural, active ingredients that effectively harm plants.<\/p>    <p>The products available contain the following common active ingredients:<\/p>    <ul class=\"wp-block-list\"> <li>Herbicidal soaps containing long-chain fatty acids<\/li>    <li>Acetic acid<\/li>    <li>Citric acid<\/li>    <li>D-limonene, a common terpene found naturally in citrus peels<\/li>    <li><a href=\"https:\/\/www.cambridge.org\/core\/journals\/weed-science\/article\/herbicide-effects-of-essential-oils\/12E79407D8741A7819A22C5F10CAECE0\" target=\"_blank\" rel=\"noreferrer noopener\">Essential oils<\/a> such as clove, summer savory, cinnamon, and red thyme<\/li>    <li><a href=\"https:\/\/extension.umd.edu\/resource\/iron-based-herbicides\" target=\"_blank\" rel=\"noreferrer noopener\">Chelated iron<\/a> (effective against broadleaf weeds but leaves grass alone)<\/li>    <li><a href=\"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/corn-gluten-meal-natural-weed-and-feed\/\">Corn gluten meal<\/a> (most common pre-emergent organic product)<\/li> <\/ul>    <p><em>Note: To give you an idea of the organic market size globally, in 2023, the herbicide industry was valued at <\/em><a href=\"https:\/\/www.transparencymarketresearch.com\/herbicides-market.html\" target=\"_blank\" rel=\"noreferrer noopener\"><em>$32.2 billion<\/em><\/a><em>. Of that, the organic herbicide global market was valued at <\/em><a href=\"https:\/\/dataintelo.com\/report\/organic-biological-herbicides-market\" target=\"_blank\" rel=\"noreferrer noopener\"><em>$1.2 billion<\/em><\/a><em>, a mere 3.7%.<\/em>&nbsp;<\/p>    <p><strong><em>What\u2019s the story behind corn gluten meal?<\/em><\/strong><\/p>    <p><a href=\"https:\/\/hortnews.extension.iastate.edu\/1997\/6-20-1997\/cornglut.html\" target=\"_blank\" rel=\"noreferrer noopener\">Dr. Nick Christians<\/a> of Iowa State University discovered corn gluten meal\u2019s weed-killing properties while researching a pathogen found on golf course turf. The corn-milling byproduct inhibits root formation of broadleaf weeds, (e.g., dandelions), and grassy weeds, (e.g., crabgrass), and was patented as a natural pre-emergent herbicide in the early 1990s. However, it works better in <a href=\"https:\/\/s3.wp.wsu.edu\/uploads\/sites\/403\/2015\/03\/corn-gluten.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">some climates<\/a> than in others.<\/p>    <p><strong>See Related:&nbsp;<\/strong><\/p>    <ul class=\"wp-block-list\"> <li><a href=\"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/how-to-get-rid-of-crabgrass\/\">How to Get Rid of Crabgrass in Your Yard<\/a><\/li>    <li><a href=\"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/how-to-get-rid-of-dandelions\/#2-how-to-kill-dandelions-naturally\">How to Kill Dandelions Naturally<\/a><\/li> <\/ul>    <h3 class=\"wp-block-heading\" id=\"4-how-organic-herbicides-work-in-plants\">How Organic Herbicides Work in Plants<\/h3>    <figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" width=\"800\" height=\"533\" src=\"https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2024\/06\/Spraying-weed-killer-with-handheld-sprayer.jpeg\" alt=\"Spraying weed killer with handheld sprayer\" class=\"wp-image-114789\" srcset=\"https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2024\/06\/Spraying-weed-killer-with-handheld-sprayer.jpeg 800w, https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2024\/06\/Spraying-weed-killer-with-handheld-sprayer-300x200.jpeg 300w, https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2024\/06\/Spraying-weed-killer-with-handheld-sprayer-150x100.jpeg 150w, https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2024\/06\/Spraying-weed-killer-with-handheld-sprayer-768x512.jpeg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\">Photo Credit: <a href=\"https:\/\/stock.adobe.com\/images\/spraying-weed-killer-onto-weeds-growing-on-a-mud-path-through-a-wild-garden\/271489615?asset_id=271489615\" target=\"_blank\" rel=\"noreferrer noopener\">dean<\/a> \/ Adobe Stock Free \/ <a href=\"https:\/\/stock.adobe.com\/license-terms\" target=\"_blank\" rel=\"noreferrer noopener\">License<\/a> <\/figcaption><\/figure>    <p>Once applied, natural weed killers work in several ways, depending on their active ingredient(s).<\/p>    <ul class=\"wp-block-list\"> <li><strong>Cell Membrane Disruption: <\/strong>Some products break down or rupture plant cell walls, leading to rapid dehydration or cellular collapse as fluids leak out. <ul class=\"wp-block-list\"> <li>Include clove oil-based, vinegar-based, and fatty acid-based herbicides.<\/li>    <li><strong>Works best for <\/strong>young weeds in full sun, and quick top kill.<\/li> <\/ul> <\/li> <\/ul>    <ul class=\"wp-block-list\"> <li><strong>Desiccation: <\/strong>Some products damage the waxy cuticle on plant leaves or directly draw moisture from the plant, causing it to dry out and die. <ul class=\"wp-block-list\"> <li>Include citric acid-based and salt-based herbicides.<\/li>    <li><strong>Works best for <\/strong>long-term weed suppression, but <a href=\"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/signs-salt-damage-lawn\/\">salts may affect soil health<\/a> negatively.<\/li> <\/ul> <\/li> <\/ul>    <ul class=\"wp-block-list\"> <li><strong>Pre-Emergent Root Inhibition: <\/strong>Some products prevent root formation in newly germinated seeds, keeping weeds from emerging through the soil surface. <ul class=\"wp-block-list\"> <li>Includes corn gluten meal.<\/li>    <li><strong>Works best for <\/strong>preventing persistent lawn weeds like dandelions and crabgrass.<\/li> <\/ul> <\/li> <\/ul>    <ul class=\"wp-block-list\"> <li><strong>Oxidative Stress: <\/strong>Some active ingredients cause oxidative harm to cells, damaging their proteins, lipids, or DNA. This damage causes cellular dysfunction, impairing the weed\u2019s growth. <ul class=\"wp-block-list\"> <li>Includes chelated iron (FeHEDTA).<\/li>    <li><strong>Works best for <\/strong>broadleaf weeds like dandelions and clover but won\u2019t harm the grass.<\/li> <\/ul> <\/li> <\/ul>    <p><strong>See Related:<\/strong><\/p>    <ul class=\"wp-block-list\"> <li><a href=\"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/how-to-apply-crabgrass-preventer\/\">When and How to Apply Crabgrass Preventer<\/a><\/li>    <li><a href=\"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/how-to-get-rid-clover-not-kill-grass\/\">How to Get Rid of Clover and Not Kill Grass<\/a><\/li> <\/ul>    <h2 class=\"wp-block-heading\" id=\"5-types-of-organic-herbicides\">Types of Organic Herbicides<\/h2>    <p>Herbicides are categorized based on when they are applied and how their active ingredients affect plants. Understanding the differences can help you choose the best herbicide for your yard and garden.<\/p>    <h3 class=\"wp-block-heading\" id=\"6-pre-emergent-vs-post-emergent-herbicides\">Pre-Emergent vs. Post-Emergent Herbicides<\/h3>    <p>Organic herbicides for weeds can be pre-emergent or post-emergent, based on when they are used.<\/p>    <ul class=\"wp-block-list\"> <li><strong>Pre-emergent<\/strong> products prevent weed seeds from sprouting through the soil surface, stopping a weed problem before it starts. Their active ingredient is a mitotic inhibitor, which halts cellular division and inhibits the growth of the root, shoot, or both.<\/li>    <li><strong>Post-emergent<\/strong> weed killer targets weeds that are actively growing above the soil surface.<\/li> <\/ul>    <p><strong>See Related:<\/strong><\/p>    <ul class=\"wp-block-list\"> <li><a href=\"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/what-are-pre-emergent-herbicides\/\">What Are Pre-Emergent Herbicides?<\/a><\/li>    <li><a href=\"https:\/\/www.lawnstarter.com\/blog\/weed-control\/types-of-post-emergent-herbicides\/\">Types of Post-Emergent Herbicides<\/a><\/li>    <li><a href=\"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/applying-post-emergent-herbicides-to-your-lawn\/\">Applying Post-Emergent Herbicides to Your Lawn<\/a><\/li> <\/ul>    <h3 class=\"wp-block-heading\" id=\"7-contact-vs-systemic-herbicides\">Contact vs. Systemic Herbicides<\/h3>    <figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" width=\"800\" height=\"1067\" src=\"https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2022\/12\/Herbicide-Illustration-LS-1.png\" alt=\"Herbicide-Illustration-LS-1\" class=\"wp-image-74490\" srcset=\"https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2022\/12\/Herbicide-Illustration-LS-1.png 800w, https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2022\/12\/Herbicide-Illustration-LS-1-225x300.png 225w, https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2022\/12\/Herbicide-Illustration-LS-1-646x862.png 646w, https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2022\/12\/Herbicide-Illustration-LS-1-112x150.png 112w, https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2022\/12\/Herbicide-Illustration-LS-1-768x1024.png 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\">Photo Credit: Juan Rodriguez<\/figcaption><\/figure>    <p>Herbicides come in two major classes \u2014 contact and systemic \u2014 based on how they affect plant tissues.&nbsp;<\/p>    <ul class=\"wp-block-list\"> <li><strong>Contact herbicides <\/strong>disrupt biological processes <em>in the plant tissues they contact.<\/em> They tend to work quickly but, in most cases, need repeated applications to kill the entire plant.<\/li>    <li><strong>Systemic herbicides<\/strong> disrupt the biological process <em>throughout the plant<\/em>, including the roots. After the applied product is absorbed into the plant tissues, the weed\u2019s vascular system carries the herbicide from the shoots to the root system, killing the entire plant.<\/li> <\/ul>    <p><em>Note: Organic herbicides are typically contact herbicides, so it\u2019s important to coat the entire weed when applying the product.<\/em><\/p>    <h3 class=\"wp-block-heading\" id=\"8-selective-vs-non-selective-herbicides\">Selective vs. Non-Selective Herbicides<\/h3>    <p>Lastly, herbicides are categorized by the type(s) of plants they affect.<\/p>    <ul class=\"wp-block-list\"> <li><strong>Selective herbicides<\/strong> <em>target specific types of plants<\/em> while leaving others unharmed. Usually, these products affect broadleaf weeds while leaving grass alone to help maintain a weed-free lawn.<\/li>    <li><strong>Non-selective herbicides<\/strong> <em>kill anything they touch<\/em>, including desired vegetation. They are best for total vegetation control in driveways, sidewalks, or garden beds.&nbsp;<\/li> <\/ul>    <p><em>Note: Most organic products, besides those with chelated iron, are non-selective, so careful application is key.<\/em><\/p>    <p><strong>See Related:<\/strong> <a href=\"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/reasons-why-weeds-grow-in-lawn\/\">Reasons Why Weeds Grow in Your Lawn<\/a><\/p>    <h2 class=\"wp-block-heading\" id=\"9-homemade-organic-weed-killers\">Homemade Organic Weed Killers<\/h2>    <p>Sometimes, something gets in the way, and you must take a DIY route. Fortunately, you can make your own organic weed killer for lawns and gardens if you can\u2019t find a product or your budget won\u2019t allow you to buy one.&nbsp;<\/p>    <h3 class=\"wp-block-heading\" id=\"10-vinegar\">Vinegar<\/h3>    <figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"450\" src=\"https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2023\/06\/how-surfactants-work.png\" alt=\"graphic showing how a surfactant works\" class=\"wp-image-94061\" srcset=\"https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2023\/06\/how-surfactants-work.png 800w, https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2023\/06\/how-surfactants-work-300x169.png 300w, https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2023\/06\/how-surfactants-work-646x363.png 646w, https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2023\/06\/how-surfactants-work-150x84.png 150w, https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2023\/06\/how-surfactants-work-768x432.png 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\">Photo Credit: Juan Rodriguez<\/figcaption><\/figure>    <p>Acetic acid was mentioned in the active ingredients list. So, one would think that the vinegar in your kitchen cabinet or pantry is the perfect solution to the weeds in your lawn or garden. However, it\u2019s not that straightforward.<\/p>    <p>While some claim kitchen vinegar (~5% acetic acid) works fabulously to kill weeds, there is little science behind the claims. When it comes down to it, the acetic acid concentration isn\u2019t high enough to do much damage. The <a href=\"https:\/\/doi.org\/10.5539\/JAS.V10N8P1\" target=\"_blank\" rel=\"noreferrer noopener\">research supporting acetic acid<\/a> as a weed killer shows the best results with 20% acetic acid concentration on broadleaf weeds versus grassy weeds.<\/p>    <p><strong><em>My Experience: <\/em><\/strong><em>I\u2019ve tried dumping straight vinegar on thistles in my yard, and it barely browns the edges. It&#8217;s far from being a wonder product. This isn\u2019t to say, though, that the vinegar bottle in your kitchen is useless!<\/em><\/p>    <p>If you want to use vinegar in your kitchen, your best bet is to <a href=\"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/how-to-make-homemade-weed-killer\/\">make a homemade weed killer<\/a> with vinegar, rubbing alcohol, salt, and dish soap. Salt and rubbing alcohol help dry out the weeds, and the soap acts as a surfactant, making the liquid stick to the foliage, making it more effective.<\/p>    <p>For a more effective homemade organic weed killer or a product to use directly on weeds, buy horticultural vinegar with a higher concentration of acetic acid. Retailers sell products with a concentration of 20% to 45% or 50%.&nbsp;<\/p>    <h3 class=\"wp-block-heading\" id=\"11-using-vinegar-safely\">Using Vinegar Safely<\/h3>    <figure class=\"wp-block-image aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2024\/07\/spray-vinegar-solution.jpg\" alt=\"close-up of a liquid being sprayed from a spray bottle outside with grass in the background\" class=\"wp-image-117802\" style=\"width:800px;height:533px\" width=\"800\" height=\"533\" srcset=\"https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2024\/07\/spray-vinegar-solution.jpg 800w, https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2024\/07\/spray-vinegar-solution-300x200.jpg 300w, https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2024\/07\/spray-vinegar-solution-150x100.jpg 150w, https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2024\/07\/spray-vinegar-solution-768x512.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\">Photo Credit: <a href=\"https:\/\/www.flickr.com\/photos\/thriftyuk\/9251949940\/\" target=\"_blank\" rel=\"noreferrer noopener\">athriftymrs.com<\/a> \/ Flickr \/ <a href=\"https:\/\/creativecommons.org\/licenses\/by-sa\/2.0\/\" target=\"_blank\" rel=\"noreferrer noopener\">CC BY-SA 2.0<\/a><\/figcaption><\/figure>    <p>However, if you do buy something more potent, it\u2019s important to <strong>heed caution<\/strong>! <em>Acetic acid at such high concentrations is a dangerous chemical.<\/em> Vinegar with more than 11% acetic acid can cause blindness and burn your skin, so follow all safety recommendations when using.<\/p>    <p>Acetic acid is a prime example of an organic treatment being more acutely toxic than synthetic herbicides, and care must be demonstrated when using it.&nbsp;<\/p>    <p>Karey Windbiel-Rojas, Associate Director for Urban &amp; Community IPM\/Area Urban IPM Advisor, has extensively researched the efficacy and safety of organic herbicides in urban landscapes. \u201cWhile organic, 20% acetic acid is very toxic,\u201d says Windbiel-Rojas, \u201cso the applicator must wear more personal protective equipment than with some other herbicides.\u201d<\/p>    <p><strong>See Related:<\/strong> <a href=\"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/vinegar-as-a-weed-killer-youre-probably-doing-it-wrong\/\">Does Vinegar Kill Weeds?<\/a><\/p>    <h3 class=\"wp-block-heading\" id=\"12-boiling-water\">Boiling Water<\/h3>    <p>For the most natural approach, look no further than your faucet. If you can boil water, you have a simple DIY organic weed killer within your reach. Boiling water works well on young, small weeds and is an excellent treatment choice for patios and driveways. Pour the water directly \u2014 and carefully \u2014 on the weeds so you don\u2019t burn yourself or kill the wrong plants.<\/p>    <h2 class=\"wp-block-heading\" id=\"13-tips-for-using-organic-herbicides\">Tips for Using Organic Herbicides<\/h2>    <p>Organic herbicides present challenges that are not found in inorganic products, so keep the following in mind:<\/p>    <ul class=\"wp-block-list\"> <li>Many organic products do not have residual effects, so reapplications may be necessary for best results.<\/li>    <li>Use it in conjunction with hand weeding or other integrated pest (e.g., weed) management methods for the best results.<\/li>    <li>Organic herbicides are typically contact herbicides, so you must cover the entire plant when applying.<\/li>    <li>Use a fine mist setting on your <a href=\"https:\/\/www.lawnstarter.com\/blog\/reviews\/best-backpack-weed-sprayers\/\">backpack weed sprayer<\/a> to coat the weed evenly.<\/li>    <li>Add dish soap to help the product stick to the leaves better.<\/li>    <li>Be aware that perennial weed plants have a more remarkable ability to recover than annuals, even if a herbicide is applied well.<\/li>    <li>The best time to apply is when temperatures are above 65 degrees Fahrenheit on a sunny day.<\/li>    <li>Treat weeds as soon as you see them. Organic herbicides work better on smaller, immature weeds than mature, bigger plants. Thomas Lanini of the University of California found the <a href=\"https:\/\/ucanr.edu\/blogs\/blogcore\/postdetail.cfm?postnum=5623\" target=\"_blank\" rel=\"noreferrer noopener\">best results<\/a> at the cotyledon or first true leaf stage.<\/li>    <li>Apply in the morning or early afternoon to give the product time to work before evening moisture.<\/li>    <li>Wait a few days after mowing to make sure there is enough leaf surface for the product to be effective.<\/li> <\/ul>    <p><strong>See Related:<\/strong> <a href=\"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/lawn-mowing-tips-cut-grass\/\">Lawn Mowing Tips: How to Mow a Lawn the Right Way<\/a><\/p>    <h2 class=\"wp-block-heading\" id=\"14-faq-about-organic-herbicides\">FAQ About Organic Herbicides<\/h2>    <div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1740294281653\"><strong class=\"schema-faq-question\">Are Organic or Conventional Herbicides Better?<\/strong> <p class=\"schema-faq-answer\">I\u2019ve been asked this question frequently, and I don\u2019t think there is a straightforward answer. As a plant and soil scientist and a homeowner, I believe that both types of products have advantages that make them better in certain regards but also disadvantages. Personally, I use a mix of organic and inorganic lawn care products on my lawn and garden.<br\/><br\/>Organic products are better if you\u2019re looking for a sustainable lawn care approach. As they\u2019re made from natural ingredients, they are more environmentally benign. However, this means they are typically not as strong. In turn, they may not be as effective and require more applications \u2014 and each application increases inherent risks. They can also come with a higher initial cost that goes up with each application.<br\/><br\/>Conventional products often work much quicker and offer more complete weed control. In some cases, this makes them a better choice. My backyard is prone to a serious dandelion and thistle infestation (there\u2019s a massive field behind my fence). Organic products barely dent the problem, no matter the herbicides I\u2019ve tried. The only way to keep both weeds under control is to use conventional, synthetic products.\u00a0<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1740294295310\"><strong class=\"schema-faq-question\">How Long Do Organic Herbicides Take to Work?<\/strong> <p class=\"schema-faq-answer\">Organic herbicides may show visible effects a few hours after application, depending on the herbicide\u2019s active ingredient, the type of weed you\u2019re spraying, and weather conditions. Vinegar, citric acid, d-limonene, and clove oil damage cells within two to 24 hours of contact. The most notable damage will be seen within the first week.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1740294300444\"><strong class=\"schema-faq-question\">What\u2019s a Good Non-Chemical Weed Preventer?<\/strong> <p class=\"schema-faq-answer\">A good way to prevent weeds without using chemicals is to cover the soil, preventing light from reaching the seeds and triggering germination.\u00a0<br\/><br\/>You can spread 2-3 inches of mulch in the area you want to keep weed-free or use a commercial weed-blocking fabric. The fabric can be applied on its own or under mulch. Cover the ground with a thick newspaper or cardboard layer for a less expensive landscape fabric alternative.<\/p> <\/div> <\/div>    <p><strong>See Related:<\/strong><\/p>    <ul class=\"wp-block-list\"> <li><a href=\"https:\/\/www.lawnstarter.com\/blog\/landscaping\/mulch-types-tips-guide\/\">Mulch Guide: Types, Pro Tips and Where to Mulch<\/a><\/li>    <li><a href=\"https:\/\/www.lawnstarter.com\/blog\/landscaping\/how-to-install-landscape-fabric\/\">How to Install Landscape Fabric (in 9 Easy Steps)<\/a><\/li>    <li><a href=\"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/sheet-mulching-lasagna-garden\/\">Sheet Mulching: What it is, How to do It<\/a><\/li> <\/ul>    <h2 class=\"wp-block-heading\" id=\"15-need-help-with-your-natural-lawn-care\">Need Help With Your Natural Lawn Care?<\/h2>    <p>If you\u2019re looking for a natural weed killer, it&#8217;s essential to choose the right organic herbicide for lawns and apply it correctly. If you\u2019re unsure how to do this, contact LawnStarter, and we\u2019ll connect you with a <a href=\"https:\/\/www.lawnstarter.com\/lawn-care\">local lawn care professional<\/a>. A local pro experienced in using organic herbicides for weeds can help you achieve a lush, healthy, eco-friendly lawn!<\/p>    <p><strong>Read More:<\/strong><\/p>    <ul class=\"wp-block-list\"> <li><a href=\"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/how-to-remove-weeds-from-gravel\/\">How to Remove Weeds From Gravel (7 Methods)<\/a><\/li>    <li><a href=\"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/read-your-weeds-identifying-weeds-lawn-health\/\">Read Your Weeds: Identify Them to Learn About Your Lawn\u2019s Health<\/a><\/li> <\/ul>   <div class=\"wp-block-ub-content-toggle wp-block-ub-content-toggle-block\" id=\"ub-content-toggle-block-89628957-b50b-4c36-833e-f46be6b70d61\" data-mobilecollapse=\"false\" data-desktopcollapse=\"true\" data-preventcollapse=\"false\" data-showonlyone=\"true\"> <div class=\"wp-block-ub-content-toggle-accordion\" style=\"border-color: #f1f1f1; \" id=\"ub-content-toggle-panel-block-\"> \t\t\t<div class=\"wp-block-ub-content-toggle-accordion-title-wrap\" style=\"background-color: #f1f1f1;\" aria-controls=\"ub-content-toggle-panel-0-89628957-b50b-4c36-833e-f46be6b70d61\" tabindex=\"0\"> \t\t\t<p class=\"wp-block-ub-content-toggle-accordion-title ub-content-toggle-title-89628957-b50b-4c36-833e-f46be6b70d61\" style=\"color: #000000; \"><strong>Source:<\/strong><\/p> \t\t\t<div class=\"wp-block-ub-content-toggle-accordion-toggle-wrap right\" style=\"color: #000000;\"><span class=\"wp-block-ub-content-toggle-accordion-state-indicator wp-block-ub-chevron-down\"><\/span><\/div> \t\t<\/div> \t\t\t<div role=\"region\" aria-expanded=\"false\" class=\"wp-block-ub-content-toggle-accordion-content-wrap ub-hide\" id=\"ub-content-toggle-panel-0-89628957-b50b-4c36-833e-f46be6b70d61\">  <p><a href=\"https:\/\/yardandgarden.extension.iastate.edu\/faq\/can-i-manage-weeds-boiling-water\" target=\"_blank\" rel=\"noreferrer noopener\">Iowa State University: Can I Manage Weeds With Boiling Water?<\/a><\/p>  <\/div> \t\t<\/div> <\/div>   <p><em>LawnStarter participates in the Amazon Services LLC Associates Program and other retailer affiliate programs. LawnStarter may earn revenue from products promoted in this article.<\/em><\/p>    <p>Main Image Credit: <a href=\"https:\/\/www.shutterstock.com\/image-photo\/weed-sprayer-1289604?irclickid=Ueux0RSicxyIUnxSIMxN7w-dUkAxJux1KwhpQc0&amp;irgwc=1&amp;utm_campaign=linkprice&amp;utm_medium=Affiliate&amp;utm_source=1193708&amp;utm_term=\" target=\"_blank\" rel=\"noreferrer noopener\">Shutterstock<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Organic herbicides use eco-friendly ingredients like vinegar, clove oil, or corn gluten meal to dry out plants or prevent sprouting.<\/p>\n","protected":false},"author":52,"featured_media":14793,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[28],"tags":[9],"class_list":["post-14789","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-lawn-care-2","tag-lawn-care"],"acf":[],"featured_image_src":"https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2019\/05\/weed-sprayer-on-lawn2.jpg?wsr","author_info":{"display_name":"Amanda Shiffler","author_link":"https:\/\/www.lawnstarter.com\/blog\/author\/amanda-shiffler\/"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Organic Herbicides: A Comprehensive Guide<\/title>\n<meta name=\"description\" content=\"Organic herbicides use eco-friendly ingredients like vinegar, clove oil, or corn gluten meal to dry out plants or prevent 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Organic products barely dent the problem, no matter the herbicides I\u2019ve tried. The only way to keep both weeds under control is to use conventional, synthetic products.\u00a0\",\"inLanguage\":\"en-US\"},\"inLanguage\":\"en-US\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/www.lawnstarter.com\\\/blog\\\/lawn-care-2\\\/natural-weed-killers-a-guide-to-organic-herbicides\\\/#faq-question-1740294295310\",\"position\":2,\"url\":\"https:\\\/\\\/www.lawnstarter.com\\\/blog\\\/lawn-care-2\\\/natural-weed-killers-a-guide-to-organic-herbicides\\\/#faq-question-1740294295310\",\"name\":\"How Long Do Organic Herbicides Take to Work?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Organic herbicides may show visible effects a few hours after application, depending on the herbicide\u2019s active ingredient, the type of weed you\u2019re spraying, and weather conditions. Vinegar, citric acid, d-limonene, and clove oil damage cells within two to 24 hours of contact. 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