{"id":2535,"date":"2019-08-16T00:01:03","date_gmt":"2019-08-16T07:01:03","guid":{"rendered":"https:\/\/depts.washington.edu\/hortlib\/pal\/pal-question-331\/"},"modified":"2023-08-09T09:27:53","modified_gmt":"2023-08-09T16:27:53","slug":"removing-noxious-weeds","status":"publish","type":"pal","link":"https:\/\/depts.washington.edu\/hortlib\/pal\/removing-noxious-weeds\/","title":{"rendered":"removing noxious weeds"},"content":{"rendered":"<p><strong>I have a non-native bamboo. It&#8217;s in a marshy area. It is soft light green. It dries to wood every year. And I cut it like firewood and chip it. Then suddenly it grew back and is growing to an acre size. It even flowers: soft light white vanilla flowers for the bees. Can I rototill it under and seed in native Northwest groundcovers?<\/strong><\/p>\n<p>&nbsp;<\/p>\n<p>It is difficult to do plant identification by description alone, but it sounds like you may have Japanese Knotweed (<i>Polygonum cuspidatum<\/i>)<br \/>\nIt is extremely (!) hard to control this plant. Rototilling it will make hundreds of new plants because it grows from the tiniest root fragment, so do not do that!<br \/>\nThere is a lot of good information on it on the Internet, but here are two good links:<\/p>\n<p><a href=\"http:\/\/www.kingcounty.gov\/environment\/animalsAndPlants\/noxious-weeds\/weed-identification\/invasive-knotweeds\/japanese-knotweed.aspx\"> King County<\/a>, which lists it as a Class B noxious weed (control recommended but not required by law)<\/p>\n<p><a href=\"https:\/\/www.nwcb.wa.gov\/weeds\/japanese-knotweed\"> Washington State Noxious Weed Control Boards<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>I have a non-native bamboo. It&#8217;s in a marshy area. It is soft light green. It dries to wood every year. And I cut it like firewood and chip it. Then suddenly it grew back and is growing to an acre size. It even flowers: soft light white vanilla flowers for the bees. Can I rototill it under and seed in native Northwest groundcovers? &nbsp; It is difficult to do plant identification by description alone, but it sounds like you&#8230;<\/p>\n<div><a class=\"more-link\" href=\"https:\/\/depts.washington.edu\/hortlib\/pal\/removing-noxious-weeds\/\">Continue reading <span class=\"screen-reader-text\">removing noxious weeds<\/span><\/a><\/div>\n","protected":false},"author":4,"featured_media":0,"menu_order":0,"template":"","keyword":[43,474],"class_list":["post-2535","pal","type-pal","status-publish","hentry","keyword-noxious-weeds","keyword-polygonum-cuspidatum"],"acf":[],"_links":{"self":[{"href":"https:\/\/depts.washington.edu\/hortlib\/wp-json\/wp\/v2\/pal\/2535"}],"collection":[{"href":"https:\/\/depts.washington.edu\/hortlib\/wp-json\/wp\/v2\/pal"}],"about":[{"href":"https:\/\/depts.washington.edu\/hortlib\/wp-json\/wp\/v2\/types\/pal"}],"author":[{"embeddable":true,"href":"https:\/\/depts.washington.edu\/hortlib\/wp-json\/wp\/v2\/users\/4"}],"wp:attachment":[{"href":"https:\/\/depts.washington.edu\/hortlib\/wp-json\/wp\/v2\/media?parent=2535"}],"wp:term":[{"taxonomy":"keyword","embeddable":true,"href":"https:\/\/depts.washington.edu\/hortlib\/wp-json\/wp\/v2\/keyword?post=2535"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}