{"id":252,"date":"2026-02-12T23:07:09","date_gmt":"2026-02-12T23:07:09","guid":{"rendered":"https:\/\/extension.colostate.edu\/gilpin\/?post_type=resource-cpt&#038;p=252"},"modified":"2026-02-27T23:54:06","modified_gmt":"2026-02-27T23:54:06","slug":"yellow-toadflax","status":"publish","type":"resource-cpt","link":"https:\/\/extension.colostate.edu\/gilpin\/resource\/yellow-toadflax\/","title":{"rendered":"Yellow Toadflax"},"content":{"rendered":"\n<div class=\"wp-block-group wp-block-pattern-longform-content is-vertical is-layout-flex wp-container-core-group-is-layout-fe9cc265 wp-block-group-is-layout-flex\">\n<div class=\"wp-block-group wp-block-pattern-quick-facts has-gray-50-background-color has-background is-vertical is-layout-flex wp-container-core-group-is-layout-fe9cc265 wp-block-group-is-layout-flex\">\n<h3 class=\"wp-block-heading\">Noxious Weed Quick Facts<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Yellow toadflax \u201csnapdragon\u201d flowers have a long spur and usually an orange throat. <\/li>\n\n\n\n<li>This plant typically blooms in June to September.<\/li>\n\n\n\n<li>Toadflax forms big colonies. Each plant can drop 15,000\u201330,000 seeds that can remain viable in soil for up to a decade.<\/li>\n\n\n\n<li>Pull or dig small patches repeatedly and bag any flowers\/seeds to avoid re-seed the area (it\u2019s hard to control overall).<\/li>\n<\/ul>\n<\/div>\n\n\n\n<div class=\"wp-block-group is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:66.66%\">\n<p>Yellow toadflax, sometimes called &#8220;butter-and-eggs,&#8221; is often one of the first plants to return after forest fire.<\/p>\n\n\n\n<p>Large colonies can be found in disturbed areas, meadows, pastures, and rights-of-way.<\/p>\n\n\n\n<p>Yellow flowers are snapdragon-shaped with distinctive long spurs and often have an orange throat. Flowers grow in groups at the end of stems and can usually be found from June through September.<\/p>\n\n\n\n<p>Multiple stems grow from the crown. Plants can grow up to two feet tall. Leaves are narrow, waxy, and attach directly to stems.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:33.33%\">\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"335\" height=\"438\" src=\"https:\/\/extension.colostate.edu\/gilpin\/wp-content\/uploads\/sites\/34\/2026\/02\/Yellow-Toadflax.jpg\" alt=\"Yellow Toadflax\" class=\"wp-image-585\" srcset=\"https:\/\/extension.colostate.edu\/gilpin\/wp-content\/uploads\/sites\/34\/2026\/02\/Yellow-Toadflax.jpg 335w, https:\/\/extension.colostate.edu\/gilpin\/wp-content\/uploads\/sites\/34\/2026\/02\/Yellow-Toadflax.jpg?resize=229,300 229w\" sizes=\"auto, (max-width: 335px) 100vw, 335px\" \/><\/figure>\n<\/div>\n<\/div>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p>Each plant can produce 15,000 to 30,000 seeds that will last for about 10 years in the soil.<\/p>\n\n\n\n<p>Pulling or digging is effective on small populations if repeated multiple times a year. Any flowers and\/or seeds should be bagged and disposed of.<\/p>\n\n\n\n<p><strong><a href=\"https:\/\/extension.colostate.edu\/gilpin\/contact\/\">Contact Gilpin County Extension<\/a><\/strong> for specific herbicide applications.<\/p>\n\n\n\n<hr aria-hidden=\"true\" class=\"wp-block-separator has-alpha-channel-opacity is-style-simple\"\/>\n\n\n\n<h4 class=\"wp-block-heading\">Important notes:<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>This highly invasive plant is difficult to control<strong> <\/strong><\/li>\n\n\n\n<li>Often found in disturbed and degraded areas<\/li>\n\n\n\n<li>List B Noxious Weed in Colorado<\/li>\n\n\n\n<li><strong>State law<\/strong>:\u00a0Toadflax\u00a0must be eradicated or contained in Gilpin County.<\/li>\n<\/ul>\n<\/div>\n\n\n\n<hr aria-hidden=\"true\" class=\"wp-block-separator has-alpha-channel-opacity is-style-simple\"\/>\n\n\n\n<div class=\"wp-block-group is-layout-constrained wp-block-group-is-layout-constrained\">\n<h2 class=\"wp-block-heading has-heading-3-font-size\" id=\"Native-look-alike:-Western-or-White-Virgin\u2019s-Bower-Clematis\">Native look-alike: Western or White Virgin\u2019s Bower Clematis<\/h2>\n\n\n\n<p>State law:&nbsp;<strong>Toadflax<\/strong>&nbsp;must be eradicated or contained in Gilpin County.<\/p>\n\n\n\n<p>The a native plant, Golden Banner (<em>Thermopsis divaricarpa<\/em>) is often confused for toadflax. Observe leaves to distinguish these plants more easily. The leaves of yellow toadflax are <strong>linear<\/strong>. The leaves of Golden Banner have <strong>three leaflets<\/strong> (like a clover).<\/p>\n\n\n\n<section tabindex=\"0\" class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/gilpin.extension.colostate.edu\/wp-content\/uploads\/sites\/29\/2017\/12\/Thermopsis-divaricarpa-1024x768.jpg\" alt=\"Golden banner\" width=\"279\" height=\"211\"><\/td><td>Golden banner (a good\/native plant) has leaflets like a clover.<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/gilpin.extension.colostate.edu\/wp-content\/uploads\/sites\/29\/2017\/12\/toadflax.jpg\" alt=\"Yellow toadflax (Linaria vulgaris)\" width=\"194\" height=\"234\"><\/td><td>Yellow toadflax (a bad\/noxious weed) has linear leaves.<\/td><\/tr><\/tbody><\/table><\/section>\n\n\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Noxious Weed Quick Facts Yellow toadflax, sometimes called &#8220;butter-and-eggs,&#8221; is often one of the first plants to return after forest fire. Large colonies can be found in&#8230;<\/p>\n","protected":false},"author":45,"featured_media":0,"parent":0,"menu_order":0,"template":"","meta":{"_acf_changed":false,"footnotes":""},"area_tax":[],"county_tax":[127],"global-category_tax":[165,167],"global-offering_tax":[],"global-sub-category_tax":[325,360],"global-topic_tax":[375],"region_tax":[385],"resource-type_tax":[388],"class_list":["post-252","resource-cpt","type-resource-cpt","status-publish","hentry"],"pp_statuses_selecting_workflow":false,"pp_workflow_action":"current","pp_status_selection":"publish","pp_post_mime_type":"","acf":[],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/extension.colostate.edu\/gilpin\/wp-json\/wp\/v2\/resource-cpt\/252","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/extension.colostate.edu\/gilpin\/wp-json\/wp\/v2\/resource-cpt"}],"about":[{"href":"https:\/\/extension.colostate.edu\/gilpin\/wp-json\/wp\/v2\/types\/resource-cpt"}],"author":[{"embeddable":true,"href":"https:\/\/extension.colostate.edu\/gilpin\/wp-json\/wp\/v2\/users\/45"}],"version-history":[{"count":3,"href":"https:\/\/extension.colostate.edu\/gilpin\/wp-json\/wp\/v2\/resource-cpt\/252\/revisions"}],"predecessor-version":[{"id":643,"href":"https:\/\/extension.colostate.edu\/gilpin\/wp-json\/wp\/v2\/resource-cpt\/252\/revisions\/643"}],"wp:attachment":[{"href":"https:\/\/extension.colostate.edu\/gilpin\/wp-json\/wp\/v2\/media?parent=252"}],"wp:term":[{"taxonomy":"area_tax","embeddable":true,"href":"https:\/\/extension.colostate.edu\/gilpin\/wp-json\/wp\/v2\/area_tax?post=252"},{"taxonomy":"county_tax","embeddable":true,"href":"https:\/\/extension.colostate.edu\/gilpin\/wp-json\/wp\/v2\/county_tax?post=252"},{"taxonomy":"global-category_tax","embeddable":true,"href":"https:\/\/extension.colostate.edu\/gilpin\/wp-json\/wp\/v2\/global-category_tax?post=252"},{"taxonomy":"global-offering_tax","embeddable":true,"href":"https:\/\/extension.colostate.edu\/gilpin\/wp-json\/wp\/v2\/global-offering_tax?post=252"},{"taxonomy":"global-sub-category_tax","embeddable":true,"href":"https:\/\/extension.colostate.edu\/gilpin\/wp-json\/wp\/v2\/global-sub-category_tax?post=252"},{"taxonomy":"global-topic_tax","embeddable":true,"href":"https:\/\/extension.colostate.edu\/gilpin\/wp-json\/wp\/v2\/global-topic_tax?post=252"},{"taxonomy":"region_tax","embeddable":true,"href":"https:\/\/extension.colostate.edu\/gilpin\/wp-json\/wp\/v2\/region_tax?post=252"},{"taxonomy":"resource-type_tax","embeddable":true,"href":"https:\/\/extension.colostate.edu\/gilpin\/wp-json\/wp\/v2\/resource-type_tax?post=252"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}