{"id":16444,"date":"2021-03-22T08:08:41","date_gmt":"2021-03-22T12:08:41","guid":{"rendered":"https:\/\/extension.umaine.edu\/gardening\/?p=16444"},"modified":"2024-07-29T10:16:39","modified_gmt":"2024-07-29T14:16:39","slug":"disposal-of-soil-that-contains-japanese-knotwood-rhizomes","status":"publish","type":"post","link":"https:\/\/extension.umaine.edu\/gardening\/2021\/03\/22\/disposal-of-soil-that-contains-japanese-knotwood-rhizomes\/","title":{"rendered":"How can I safely dispose of soil that contains Japanese Knotwood rhizomes?"},"content":{"rendered":"<h3>Question:<\/h3>\n<p>I live in Saco and am in the process of a multi-year (lifelong?) effort to control the spread of Japanese Knotweed on my property, using a combination of methods. My property abuts a community garden\/park, which is infested, so I have no illusions of ever eradicating it but am trying to control its spread into my yard. Chemicals are not an option, as I&#8217;m against them and there&#8217;s a creek\/storm drain between my property and the park.<\/p>\n<p>I&#8217;m planning to dig a trench to prevent the knotweed from spreading into my lawn area. Whatever knotweed spreads underground past the trench will get mowed. My question: where and how do I safely dispose of the dug-up soil with rhizomes in it? I want to communicate to the landfill folks that this can&#8217;t go on compost and shouldn&#8217;t be used for fill dirt but considered as trash. I can try removing the visible rhizomes and double bag them separately, but there will still be remnants left.<\/p>\n<p>The strip I plan on digging up has been mowed regularly for 5 years, so the rhizomes are relatively weak, and I plan to dig from mid to late April before shoots come up. Any guidelines on how deep to dig, and where to dispose?<\/p>\n<h3>Answer:<\/h3>\n<p><em>Tori Lee Jackson, Extension Professor of Agriculture and Natural Resources<\/em><\/p>\n<p>Digging out the rhizomes is not recommended because Japanese Knotweed can create a new plant from very tiny pieces of plant left in the soil. Repeated mowing\/cutting (<a href=\"https:\/\/www.maine.gov\/dacf\/mnap\/features\/invasive_plants\/fallopia.htm\" target=\"_blank\" rel=\"noopener noreferrer\" data-saferedirecturl=\"https:\/\/www.google.com\/url?q=https:\/\/www.maine.gov\/dacf\/mnap\/features\/invasive_plants\/fallopia.htm&amp;source=gmail&amp;ust=1616499771961000&amp;usg=AFQjCNHG3JTLSoUXh6KPAfH7v56MZXSjXA\">up to once\/week<\/a> ), raking up those plant parts and placing them in black garbage bags, and then leaving those tied bags in the sun for a few weeks should be sufficient to kill the stems and leaves. Even then, it should not go into a compost or burn pile. Not all landfills accept invasive species, so calling your local transfer station ahead of time is recommended.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Question: I live in Saco and am in the process of a multi-year (lifelong?) effort to control the spread of Japanese Knotweed on my property, using a combination of methods. My property abuts a community garden\/park, which is infested, so I have no illusions of ever eradicating it but am trying to control its spread [&hellip;]<\/p>\n","protected":false},"author":56,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[199,202,206,207],"tags":[],"class_list":["post-16444","post","type-post","status-publish","format-standard","hentry","category-ask","category-maintenance","category-lawns","category-soil"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How can I safely dispose of soil that contains Japanese Knotwood rhizomes? - Cooperative Extension: Garden and Yard - University of Maine Cooperative Extension<\/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:\/\/extension.umaine.edu\/gardening\/2021\/03\/22\/disposal-of-soil-that-contains-japanese-knotwood-rhizomes\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How can I safely dispose of soil that contains Japanese Knotwood rhizomes? - Cooperative Extension: Garden and Yard - University of Maine Cooperative Extension\" \/>\n<meta property=\"og:description\" content=\"Question: I live in Saco and am in the process of a multi-year (lifelong?) effort to control the spread of Japanese Knotweed on my property, using a combination of methods. 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