{"id":112456,"date":"2024-05-17T17:33:54","date_gmt":"2024-05-17T20:33:54","guid":{"rendered":"https:\/\/www.lawnstarter.com\/blog\/?p=112456"},"modified":"2024-10-28T15:08:02","modified_gmt":"2024-10-28T18:08:02","slug":"what-is-onion-grass","status":"publish","type":"post","link":"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/what-is-onion-grass\/","title":{"rendered":"What Is Onion Grass and How to Identify It"},"content":{"rendered":"<p>If you\u2019ve just mowed your grass and notice a tear coming to your eye, it may not just be tears of joy from your beautiful lawn. You might have a perennial weed called onion grass. But what is onion grass, and how do you identify it?<\/p>    <p>In short, onion grass, also called wild garlic, is a weed. An aggressive and invasive weed, at that. This plant is one that you most certainly don\u2019t want in your yard if you\u2019re trying to keep a lush carpet of grass. Thankfully, there are ways you can both keep it out and remove it when it creeps its way in.<\/p>    <p>Read below to learn more about onion grass and how to protect your lawn from it.<\/p>   <div class=\"wp-block-ub-table-of-contents-block ub_table-of-contents\" id=\"ub_table-of-contents-18c3deea-ed83-4fe6-b1c8-1677fcb5a928\" 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\">In this article, we\u2019ll discuss:<\/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\/what-is-onion-grass\/#0-how-to-identify-onion-grass\" style=\"\">How to Identify Onion Grass<\/a><\/li><li style=\"\"><a href=\"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/what-is-onion-grass\/#1-why-onion-grass-is-a-problem\" style=\"\">Why Onion Grass is a Problem<\/a><\/li><li style=\"\"><a href=\"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/what-is-onion-grass\/#2-how-to-remove-and-prevent-onion-grass\" style=\"\">How to Remove and Prevent Onion Grass<\/a><\/li><li style=\"\"><a href=\"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/what-is-onion-grass\/#3-where-does-onion-grass-come-from\" style=\"\">Where Does Onion Grass Come From?<\/a><ul><li style=\"\"><a href=\"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/what-is-onion-grass\/#4-spreading-through-birds\" style=\"\">Spreading Through Birds<\/a><\/li><li style=\"\"><a href=\"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/what-is-onion-grass\/#5-spreading-from-other-lawns\" style=\"\">Spreading From Other Lawns<\/a><\/li><\/ul><\/li><li style=\"\"><a href=\"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/what-is-onion-grass\/#6-faq-about-onion-grass\" style=\"\">FAQ About Onion Grass<\/a><\/li><li style=\"\"><a href=\"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/what-is-onion-grass\/#10-find-your-lawn-expert\" style=\"\">Find Your Lawn Expert<\/a><\/li><\/ul> \t\t\t<\/div> \t\t<\/div><\/div>   <h2 class=\"wp-block-heading\" id=\"0-how-to-identify-onion-grass\">How to Identify Onion Grass<\/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\/2024\/05\/Onion-grass-in-fall.jpg\" alt=\"Onion grass in fall\" class=\"wp-image-113902\" srcset=\"https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2024\/05\/Onion-grass-in-fall.jpg 800w, https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2024\/05\/Onion-grass-in-fall-300x225.jpg 300w, https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2024\/05\/Onion-grass-in-fall-150x113.jpg 150w, https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2024\/05\/Onion-grass-in-fall-768x576.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\">Photo Credit: <a href=\"https:\/\/commons.wikimedia.org\/wiki\/File:2021-03-09_12_43_31_Onion_grass_within_Franklin_Farm_Park_in_the_Franklin_Farm_section_of_Oak_Hill,_Fairfax_County,_Virginia.jpg\" target=\"_blank\" rel=\"noreferrer noopener\">Famartin<\/a> \/ Wikimedia Commons \/ <a href=\"https:\/\/creativecommons.org\/licenses\/by-sa\/4.0\" target=\"_blank\" rel=\"noreferrer noopener\">CC BY-SA 4.0<\/a><\/figcaption><\/figure>    <p>Identifying onion grass can be a bit tricky if you\u2019re not sure what to look for. Thankfully, once you do, you should be able to spot this weed no problem.<\/p>    <p>Firstly, onion grass is <strong>thicker<\/strong> and sometimes grows <strong>taller <\/strong>than most lawn grasses, so look for especially thick or tall patches of grass. Second, you may be able to notice the <strong>top of the bulb<\/strong> peeking out from the soil, which is a great help when you\u2019re looking for onion grass.<\/p>    <p>Another good way to identify onion grass is by its smell. Just as you would think, onion grass has a <strong>distinct smell of onions.<\/strong> This smell should be especially noticeable after the plant is cut. After cutting your grass, take a lap around your yard and see if you can <strong>smell onions.<\/strong> If you can, there\u2019s likely some onion grass nearby.<\/p>    <p>Onion grass grows from late fall to early spring, so you\u2019re most likely to see it sprout up then. However, remember that onion grass is a <strong>perennial,<\/strong> which means that it grows back every year. In addition, the main part of the plant <strong>grows underground,<\/strong> so it\u2019s easy to miss. Both of these combined can make onion grass a very stubborn plant.<\/p>    <p>For more information on identifying weeds, read this article: <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>.<\/p>    <h2 class=\"wp-block-heading\" id=\"1-why-onion-grass-is-a-problem\">Why Onion Grass is a Problem<\/h2>    <p>Like most weeds, onion grass is an unsightly intruder in your lawn.&nbsp;<\/p>    <p>Onion Grass is <strong>not native<\/strong> to the United States. It originally came from <strong>Europe, Africa, and the Middle East <\/strong>and has become an invasive species in the U.S. An <strong>\u2018invasive species\u2019<\/strong> is any non-native animal or plant that harms the environment it\u2019s introduced into, usually by outcompeting the local species or killing them outright. In this case, that \u2018local species\u2019 is your lawn.<\/p>    <p>Onion grass will take over patches of grass and can even <strong>overtake your entire lawn<\/strong> if left unchecked. This species spreads rapidly once it\u2019s established and can require multiple seasons to get rid of. For the sake of your lawn, remove onion grass <strong>as soon as you identify it.<\/strong> <\/p>    <h2 class=\"wp-block-heading\" id=\"2-how-to-remove-and-prevent-onion-grass\">How to Remove and Prevent Onion Grass<\/h2>    <figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" width=\"800\" height=\"534\" src=\"https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2024\/05\/Onion-grass-Allium-vineale-early-spring.jpg\" alt=\"Onion grass (Allium vineale) early spring\" class=\"wp-image-113901\" srcset=\"https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2024\/05\/Onion-grass-Allium-vineale-early-spring.jpg 800w, https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2024\/05\/Onion-grass-Allium-vineale-early-spring-300x200.jpg 300w, https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2024\/05\/Onion-grass-Allium-vineale-early-spring-150x100.jpg 150w, https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2024\/05\/Onion-grass-Allium-vineale-early-spring-768x513.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\">Photo Credit: <a href=\"https:\/\/commons.wikimedia.org\/wiki\/File:Allium_vineale_early_spring_001.JPG\" target=\"_blank\" rel=\"noreferrer noopener\">User:SB_Johnny<\/a> \/ Wikimedia Commons \/ <a href=\"http:\/\/creativecommons.org\/licenses\/by-sa\/3.0\/\" target=\"_blank\" rel=\"noreferrer noopener\">CC BY-SA 3.0<\/a><\/figcaption><\/figure>    <p>Thankfully, you can stop onion grass from cropping up in your yard as long as you <strong>stay vigilant.<\/strong> Monitor your lawn closely and identify and <a href=\"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/how-to-remove-onion-grass\/\">remove onion grass<\/a> whenever it appears. The best methods are manual removal and herbicides.<\/p>    <p>You should also prevent onion grass by making your yard inhospitable to it. Here\u2019s a short list of things you can do to discourage onion grass in your yard:<br><\/p>    <ul class=\"wp-block-list\"> <li><strong>Maintain Your Lawn:<\/strong> A <strong>healthy lawn<\/strong> makes for a bad growing environment for weeds like onion grass. Keep your lawn in good shape so that it\u2019s strong enough to outcompete onion grass.<\/li> <\/ul>    <ul class=\"wp-block-list\"> <li><strong>Keep Thick Grass:<\/strong> Onion grass doesn\u2019t grow well in<strong> thick grass.<\/strong> If you have a thick lawn, it will have an easier time repelling onion grass.<\/li> <\/ul>    <ul class=\"wp-block-list\"> <li><strong>Raise Your Soil pH:<\/strong> Onion grass prefers <strong>acidic soil. <\/strong>Keep the pH at a neutral or basic level to create an inhospitable environment for onion grass.<\/li> <\/ul>    <ul class=\"wp-block-list\"> <li><strong>Aerate Your Soil:<\/strong> Onion grass grows well in <strong>heavy, compacted soil. <\/strong>Aerating your soil on a regular basis will help prevent onion grass from growing. Read this guide to learn about <a href=\"https:\/\/www.lawnstarter.com\/blog\/lawn-care-2\/what-to-do-after-aerating-your-lawn\/\">What to Do After Aerating Your Lawn<\/a>.<\/li> <\/ul>    <ul class=\"wp-block-list\"> <li><strong>Add Compost:<\/strong> Lastly, adding compost and topsoil to your lawn will help prevent onion grass. Onion grass prefers soil with a <strong>low nutrient count,<\/strong> so adding nutrients will help prevent it from growing.<\/li> <\/ul>    <h2 class=\"wp-block-heading\" id=\"3-where-does-onion-grass-come-from\">Where Does Onion Grass Come From?<\/h2>    <figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" width=\"800\" height=\"600\" src=\"https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2024\/05\/Onion-grass-in-lawn.jpg\" alt=\"Onion grass in lawn\" class=\"wp-image-113903\" srcset=\"https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2024\/05\/Onion-grass-in-lawn.jpg 800w, https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2024\/05\/Onion-grass-in-lawn-300x225.jpg 300w, https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2024\/05\/Onion-grass-in-lawn-150x113.jpg 150w, https:\/\/www.lawnstarter.com\/blog\/wp-content\/uploads\/2024\/05\/Onion-grass-in-lawn-768x576.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\">Photo Credit: <a href=\"https:\/\/commons.wikimedia.org\/wiki\/File:2021-03-10_17_07_22_Onion_grass_along_Terrace_Boulevard_in_the_Parkway_Village_section_of_Ewing_Township,_Mercer_County,_New_Jersey.jpg\" target=\"_blank\" rel=\"noreferrer noopener\">Famartin<\/a> \/ Wikimedia Commons \/ <a href=\"https:\/\/creativecommons.org\/licenses\/by-sa\/4.0\" target=\"_blank\" rel=\"noreferrer noopener\">CC BY-SA 4.0<\/a><\/figcaption><\/figure>    <p>If you have onion grass cropping up in your yard, you may be wondering where it came from. Weeds can come from almost anywhere. Onion grass in particular can lie in wait for quite some time. Their underground bulbs can go dormant for up to <strong>six years,<\/strong> so it could have been there for ages and you just never knew.&nbsp;<\/p>    <p>Of course, every plant needs to spread somehow, and onion grass is no different. Here\u2019s a couple of ways onion grass can spread to your lawn:<\/p>    <h3 class=\"wp-block-heading\" id=\"4-spreading-through-birds\">Spreading Through Birds<\/h3>    <p>A common way that weeds like onion grass spread is through <strong>birds. <\/strong>Birds eat plants\u2019 seeds, then leave droppings with those seeds just about everywhere, including your lawn. Feathered friends like sparrows and robins may be a welcome sight in a suburban landscape, but they unfortunately can also <strong>spread weeds.<\/strong><\/p>    <h3 class=\"wp-block-heading\" id=\"5-spreading-from-other-lawns\">Spreading From Other Lawns<\/h3>    <p>Alternatively, if your <strong>neighbor <\/strong>has onion grass in their lawn, it can spread to yours if it goes unaddressed.<\/p>    <p>This usually requires the onion grass to be present for a <strong>long time<\/strong> and, depending on where in the other lawn it started, to overtake quite a bit of the initial lawn, so it\u2019s rather unlikely that it will go unnoticed for such a long period of time. However, it\u2019s <strong>not impossible.<\/strong><\/p>    <h2 class=\"wp-block-heading\" id=\"6-faq-about-onion-grass\">FAQ About Onion Grass<\/h2>    <h3 class=\"wp-block-heading\" id=\"7-is-onion-grass-related-to-onions\">Is onion grass related to onions?<\/h3>    <p>Sort of. Onions and onion grass are both members of the genus Allium. Common onions that we eat and buy in a grocery store are <em>Allium cepa,<\/em> while onion grass is <em>Allium vineale.<\/em> Think of them as distant cousins.<\/p>    <h3 class=\"wp-block-heading\" id=\"8-is-onion-grass-edible\">Is onion grass edible?<\/h3>    <p>Yes. The <strong>leaves, flowers, and bulbs<\/strong> of the onion grass plant are all edible. If you\u2019d like, you can try to grow it in a food garden.<\/p>    <p>If you pull onion grass out of your yard, though, and want to try chowing down on it, you should reconsider if you treat your lawn with <strong>pesticides.<\/strong> Even if onion grass is resistant to them or if you haven\u2019t targeted it with poisons, you still don\u2019t want to roll those dice.<\/p>    <h3 class=\"wp-block-heading\" id=\"9-why-does-onion-grass-keep-coming-back\">Why does onion grass keep coming back?<\/h3>    <p>If you have a recurring onion grass problem, it\u2019s likely because you\u2019re only removing the surface part of the plant. Just like the veggie they\u2019re named after, onion grass grows <strong>bulbs below the ground.<\/strong> That\u2019s what you need to remove in order to get rid of onion grass for good. If it\u2019s still present, the plant will keep coming back <strong>every year.<\/strong><\/p>    <h2 class=\"wp-block-heading\" id=\"10-find-your-lawn-expert\">Find Your Lawn Expert<\/h2>    <p>Onion grass might be annoying, but you can keep it out of your lawn if you <strong>stay vigilant.<\/strong> When it arrives, <strong>get rid of it immediately<\/strong> to protect your grass.<\/p>    <p>If you need expert help with your grass, contact <a href=\"https:\/\/www.lawnstarter.com\/\">lawn care professionals near you<\/a>. They can take care of your yard, mow the turf, and protect your lawn from invasive weeds.<\/p>    <p>Main Photo Credit: <a href=\"https:\/\/commons.wikimedia.org\/wiki\/File:2021-03-07_12_29_44_Onion_grass_along_Tranquility_Lane_in_the_Franklin_Farm_section_of_Oak_Hill,_Fairfax_County,_Virginia.jpg\" target=\"_blank\" rel=\"noreferrer noopener\">Famartin<\/a> \/ Wikimedia Commons \/ <a href=\"https:\/\/creativecommons.org\/licenses\/by-sa\/4.0\" target=\"_blank\" rel=\"noreferrer noopener\">CC BY-SA 4.0<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Onion grass is an aggressive and invasive weed that can take over your lawn if you let it. Learn more here.<\/p>\n","protected":false},"author":147,"featured_media":113897,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[28],"tags":[9],"class_list":["post-112456","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\/2024\/05\/Onion-grass-along-Tranquility-Lane-in-the-Franklin-Farm-section-of-Oak-Hill-Fairfax-County-Virginia.jpg?wsr","author_info":{"display_name":"Austin Geiger","author_link":"https:\/\/www.lawnstarter.com\/blog\/author\/austin-geiger\/"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What Is Onion Grass?<\/title>\n<meta name=\"description\" content=\"Onion grass is an aggressive and invasive weed that can take over your lawn. 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