{"id":2216,"date":"2025-06-16T08:10:14","date_gmt":"2025-06-16T08:10:14","guid":{"rendered":"https:\/\/www.zuurstofplanten.net\/?page_id=2216"},"modified":"2025-06-16T08:32:33","modified_gmt":"2025-06-16T08:32:33","slug":"duizendknoopfonteinkruid","status":"publish","type":"page","link":"https:\/\/www.zuurstofplanten.net\/en\/zuurstof-planten\/duizendknoopfonteinkruid\/","title":{"rendered":"Knotweed pondweed"},"content":{"rendered":"<div data-elementor-type=\"wp-page\" data-elementor-id=\"2216\" class=\"elementor elementor-2216\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-ef3342c e-flex e-con-boxed e-con e-parent\" data-id=\"ef3342c\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-44fecfe elementor-widget elementor-widget-heading\" data-id=\"44fecfe\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">Knotweed pondweed<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a66d901 elementor-widget elementor-widget-breadcrumbs\" data-id=\"a66d901\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"breadcrumbs.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<p id=\"breadcrumbs\"><span><span><a href=\"https:\/\/www.zuurstofplanten.net\/en\/\">Home<\/a><\/span><\/span><\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-79a7b15 e-flex e-con-boxed e-con e-parent\" data-id=\"79a7b15\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1d2b7d6 elementor-widget elementor-widget-heading\" data-id=\"1d2b7d6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Knotweed | Oxygen plant that provides shade in shallow ponds<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-3f5502b e-grid e-con-full e-con e-child\" data-id=\"3f5502b\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3d1ebc3 elementor-widget elementor-widget-text-editor\" data-id=\"3d1ebc3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Giant knotweed (Potamogeton polygonifolius) is a versatile native oxygen plant that is perfect for shallow ponds. The plant is known for its leathery, floating leaves that partly cover the water surface, providing shade for fish and amphibians. At the same time, the plant provides oxygenated water, making it a valuable addition in natural and ecologically designed ponds.<\/span><\/p><p>\u00a0<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-62556ec elementor-cta--skin-classic elementor-animated-content elementor-bg-transform elementor-bg-transform-zoom-in elementor-widget elementor-widget-call-to-action\" data-id=\"62556ec\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"call-to-action.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<a class=\"elementor-cta\" href=\"https:\/\/vijvermeester.nl\/waterranonkel.html?utm_source=affiliate&#038;utm_medium=partner&#038;utm_campaign=zuurstofplanten_net&#038;utm_content=waterranonkel\" rel=\"nofollow\">\n\t\t\t\t\t<div class=\"elementor-cta__bg-wrapper\">\n\t\t\t\t<div class=\"elementor-cta__bg elementor-bg\" style=\"background-image: url(https:\/\/www.zuurstofplanten.net\/wp-content\/uploads\/2025\/06\/duizendknoopfonteinkruid.jpg);\" role=\"img\" aria-label=\"Knotweed pondweed\"><\/div>\n\t\t\t\t<div class=\"elementor-cta__bg-overlay\"><\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-cta__content\">\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t<h2 class=\"elementor-cta__title elementor-cta__content-item elementor-content-item\">\n\t\t\t\t\t\tBuy knotweed?\t\t\t\t\t<\/h2>\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-cta__description elementor-cta__content-item elementor-content-item\">\n\t\t\t\t\t\tKnotweed is for sale through De Vijvermeester's webshop. Here you can find beautiful bunches of high quality.\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-cta__button-wrapper elementor-cta__content-item elementor-content-item\">\n\t\t\t\t\t<span class=\"elementor-cta__button elementor-button elementor-size-\">\n\t\t\t\t\t\tOrder on Vijvermeester.nl\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ba0ec3c elementor-widget elementor-widget-heading\" data-id=\"ba0ec3c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">What is knotweed (Potamogeton polygonifolius)?\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6dd58b1 elementor-widget elementor-widget-text-editor\" data-id=\"6dd58b1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Centipede pondweed is a perennial aquatic plant in the pondweed family. This species feels at home in shallow ponds where the water is poor in calcium and nutrients, and slightly acidic in nature. Typical growing sites include peat ponds, dune pools and moist lowlands on sandy soils. It is a rooting plant that functions well in clear and calm water. The name \"knotweed\" refers to the plant's ability to form new rosettes via nodes on the stem when dry.<\/span><\/p><p><span style=\"font-weight: 400;\">It grows 25 to 70 cm tall and forms both submerged and floating leaves. The floating leaves are oval to oblong in shape, leathery and sometimes bronze-coloured. Between May and August, the plant blooms with inconspicuous green flowers that rise above the water in a spike-shaped inflorescence.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3a9cd85 elementor-widget elementor-widget-heading\" data-id=\"3a9cd85\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Characteristics and Growth Mode<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-afe174e elementor-widget elementor-widget-text-editor\" data-id=\"afe174e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul><li style=\"font-weight: 400;\" aria-level=\"1\"><strong>Type<\/strong><b>:<\/b><span style=\"font-weight: 400;\"> Rooting oxygen plant<\/span><span style=\"font-weight: 400;\"><br \/><\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><b>Pitch:<\/b><span style=\"font-weight: 400;\"> Full sun to light shade (preferably at least 6 hours of sun per day for optimal growth and oxygen production)<\/span><span style=\"font-weight: 400;\"><br \/><\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><b>Planting depth:<\/b><span style=\"font-weight: 400;\"> 50 to 100 cm (can also grow in shallower zones, but does not grow as well below 40-50 cm)<\/span><span style=\"font-weight: 400;\"><br \/><\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><b>Leaves:<\/b><span style=\"font-weight: 400;\"> Floating, leathery, oval<\/span><span style=\"font-weight: 400;\"><br \/><\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><b>Bloom:<\/b><span style=\"font-weight: 400;\"> May to August, green flowers in spike form<\/span><span style=\"font-weight: 400;\"><br \/><\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><b>Height:<\/b><span style=\"font-weight: 400;\"> 25-70 cm<\/span><span style=\"font-weight: 400;\"><br \/><\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><b>Hardy:<\/b><span style=\"font-weight: 400;\"> Yes, winter buds on rhizome<\/span><span style=\"font-weight: 400;\"><br \/><br \/><\/span><\/li><\/ul><p><span style=\"font-weight: 400;\">The plant grows from an underground rhizome and copes well with varying water levels. This characteristic makes the plant very suitable for shallow areas that sometimes temporarily dry up. When temperatures rise again, the plant spontaneously resumes its development.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f7cfc73 elementor-widget elementor-widget-heading\" data-id=\"f7cfc73\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Knotweed in the Pond<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2bb841e elementor-widget elementor-widget-text-editor\" data-id=\"2bb841e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Thanks to its combination of oxygen production and shading, knotweed is an ideal choice for shallow ponds. The shade under the leaves helps keep the water cooler, which is beneficial for fish and prevents excessive algae growth.<\/span><\/p><p><span style=\"font-weight: 400;\">The plant is suitable for pond baskets or directly in the soil, in substrate, sand or pond soil. Its robust growth and adaptability make it a low-maintenance, self-sustaining plant.<\/span><\/p><p><span style=\"font-weight: 400;\">Good combinations:<\/span><\/p><ul><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\"><a href=\"https:\/\/www.zuurstofplanten.net\/en\/zuurstof-planten\/fonteinkruid\/glanzend-fonteinkruid\/\"><strong>Glossy Pondweed<\/strong><\/a> - for powerful oxygen production<\/span><span style=\"font-weight: 400;\"><br \/><\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\"><strong><a href=\"https:\/\/www.zuurstofplanten.net\/en\/zuurstof-planten\/grof-hoornblad\/\">Coarse Hornleaf<\/a><\/strong> - anti-algae and fast-growing<\/span><span style=\"font-weight: 400;\"><br \/><\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\"><strong><a href=\"https:\/\/www.zuurstofplanten.net\/en\/oeverplanten\/lidsteng\/\">Lidsteng<\/a> <\/strong>- evergreen<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><strong><a href=\"https:\/\/www.zuurstofplanten.net\/en\/zuurstof-planten\/aarvederkruid\/\">Jerusalem artichoke<\/a> <\/strong>- graceful and oxygenated<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2b1ce67 elementor-widget elementor-widget-heading\" data-id=\"2b1ce67\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Frequently asked questions<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-76a05be elementor-widget elementor-widget-heading\" data-id=\"76a05be\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">How much knotweed do I need?<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5a361e0 elementor-widget elementor-widget-text-editor\" data-id=\"5a361e0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">For a healthy pond environment, we recommend 4 to 5 bunches per 1,000 litres of water. Calculate here<strong> <a href=\"https:\/\/www.zuurstofplanten.net\/en\/kennisbank\/hoeveel-zuurstofplanten-in-een-vijver\/\">how many oxygen plants you need in the pond<\/a><\/strong>.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fdff7ba elementor-widget elementor-widget-heading\" data-id=\"fdff7ba\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">How long will this plant last?<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4238a1c elementor-widget elementor-widget-text-editor\" data-id=\"4238a1c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>This plant is perennial and can grow for years, provided conditions remain suitable.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f578489 elementor-widget elementor-widget-heading\" data-id=\"f578489\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Can the plant withstand winter?<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-75c3118 elementor-widget elementor-widget-text-editor\" data-id=\"75c3118\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Yes, the plant is completely hardy. In mild winters, it remains partly green.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-04f0410 elementor-widget elementor-widget-heading\" data-id=\"04f0410\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Does he need extra nutrition?<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-474c1e6 elementor-widget elementor-widget-text-editor\" data-id=\"474c1e6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>No, centipede pondweed gets all its nutrition from the pond water itself.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-90caf9a elementor-widget elementor-widget-heading\" data-id=\"90caf9a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Should I prune or maintain this oxygen plant?<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4df5a93 elementor-widget elementor-widget-text-editor\" data-id=\"4df5a93\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Maintenance is minimal. If necessary, older or dead parts can be removed in autumn, but this is often not strictly necessary.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3d2b331 elementor-widget elementor-widget-heading\" data-id=\"3d2b331\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Buy knotweed<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-69a45a3 elementor-widget elementor-widget-image\" data-id=\"69a45a3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/www.zuurstofplanten.net\/wp-content\/uploads\/2025\/06\/duizendknoopfonteinkruid-300x300.jpg\" class=\"attachment-medium size-medium wp-image-2218\" alt=\"Duizendknoopfonteinkruid\" srcset=\"https:\/\/www.zuurstofplanten.net\/wp-content\/uploads\/2025\/06\/duizendknoopfonteinkruid-300x300.jpg 300w, https:\/\/www.zuurstofplanten.net\/wp-content\/uploads\/2025\/06\/duizendknoopfonteinkruid-150x150.jpg 150w, https:\/\/www.zuurstofplanten.net\/wp-content\/uploads\/2025\/06\/duizendknoopfonteinkruid-12x12.jpg 12w, https:\/\/www.zuurstofplanten.net\/wp-content\/uploads\/2025\/06\/duizendknoopfonteinkruid.jpg 700w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8d5321b elementor-widget elementor-widget-text-editor\" data-id=\"8d5321b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Giant knotweed is available from our <strong><a href=\"https:\/\/vijvermeester.nl\/duizendknoopfonteinkruid.html?utm_source=affiliate&amp;utm_medium=partner&amp;utm_campaign=zuurstofplanten_net&amp;utm_content=duizendknoopfonteinkruid\">sales partner Vijvermeester.nl<\/a><\/strong>.\u00a0<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-71cf452 elementor-align-left elementor-widget elementor-widget-button\" data-id=\"71cf452\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm elementor-animation-grow\" href=\"https:\/\/vijvermeester.nl\/duizendknoopfonteinkruid.html?utm_source=affiliate&#038;utm_medium=partner&#038;utm_campaign=zuurstofplanten_net&#038;utm_content=duizendknoopfonteinkruid\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t<span class=\"elementor-button-icon\">\n\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-shopping-cart\" viewbox=\"0 0 576 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M528.12 301.319l47.273-208C578.806 78.301 567.391 64 551.99 64H159.208l-9.166-44.81C147.758 8.021 137.93 0 126.529 0H24C10.745 0 0 10.745 0 24v16c0 13.255 10.745 24 24 24h69.883l70.248 343.435C147.325 417.1 136 435.222 136 456c0 30.928 25.072 56 56 56s56-25.072 56-56c0-15.674-6.447-29.835-16.824-40h209.647C430.447 426.165 424 440.326 424 456c0 30.928 25.072 56 56 56s56-25.072 56-56c0-22.172-12.888-41.332-31.579-50.405l5.517-24.276c3.413-15.018-8.002-29.319-23.403-29.319H218.117l-6.545-32h293.145c11.206 0 20.92-7.754 23.403-18.681z\"><\/path><\/svg>\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Click to visit the Vijvermeester.nl webshop<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>Duizendknoopfonteinkruid Duizendknoopfonteinkruid | Zuurstofplant die schaduw biedt in ondiepe vijvers Duizendknoopfonteinkruid (Potamogeton polygonifolius) is een veelzijdige inheemse zuurstofplant die perfect tot zijn recht komt in ondiepe vijvers. De plant staat bekend om zijn leerachtige, drijvende bladeren die het wateroppervlak deels bedekken en zo schaduw bieden aan vissen en amfibie\u00ebn. Tegelijkertijd zorgt de plant voor zuurstofrijk [&hellip;]<\/p>","protected":false},"author":5,"featured_media":0,"parent":778,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"elementor_header_footer","meta":{"_acf_changed":false,"iawp_total_views":74,"footnotes":""},"class_list":["post-2216","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Duizendknoopfonteinkruid | Zuurstofplant voor Ondiepe Vijvers<\/title>\n<meta name=\"description\" content=\"Duizendknoopfonteinkruid is een inheemse, onderhoudsarme zuurstofplant met drijvende bladeren. 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