{"product_id":"lobelia-siphilitica-blue-lobelia-marginal-pond-plants-mbp072","title":"Lobelia siphilitica (Blue lobelia) - Marginal Pond Plants - MBP072","description":"\u003cdiv style=\"text-align: center;\"\u003e\n\u003cp\u003e\u003cstrong\u003eLobelia siphilitica\u003c\/strong\u003e, commonly known as \u003cem\u003eBlue Lobelia\u003c\/em\u003e or \u003cem\u003eGreat Blue Lobelia\u003c\/em\u003e, is a herbaceous perennial native to North America. Renowned for its tall spikes of vibrant blue flowers and ability to thrive in moist conditions, this plant is a striking addition to water gardens, pond edges, and damp borders. Its late-season blooms provide a valuable source of colour and nectar when many other plants have finished flowering.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp\u003e\u003cem\u003eLobelia siphilitica\u003c\/em\u003e grows to a height of 60–100 cm (24–40 inches) with a spread of 30–45 cm (12–18 inches). The plant forms a clump of lance-shaped, toothed green leaves that create a tidy base for its flowering stems.\u003c\/p\u003e\n\u003cp\u003eFrom late summer to early autumn (August to October), tall, unbranched spikes emerge, bearing tubular, deep blue to violet flowers. The blooms are two-lipped, with the lower lip often larger, creating a distinctive and elegant appearance. These flowers are highly attractive to pollinators such as bees and butterflies.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eGrowing Conditions\u003c\/h3\u003e\n\u003cp\u003e\u003cem\u003eLobelia siphilitica\u003c\/em\u003e thrives in full sun to partial shade and prefers consistently moist or waterlogged soil. It grows well in damp meadows, along pond margins, or in bog gardens. The plant performs best in rich, loamy soil but can adapt to clay or sandy conditions as long as adequate moisture is maintained. It prefers slightly acidic to neutral pH levels.\u003c\/p\u003e\n\u003cp\u003eHardy in the UK, \u003cem\u003eBlue Lobelia\u003c\/em\u003e can tolerate frost and will regrow each spring after winter dormancy, making it a reliable choice for temperate gardens.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003ePropagation and Care\u003c\/h3\u003e\n\u003cp\u003e\u003cem\u003eLobelia siphilitica\u003c\/em\u003e can be propagated by seed or division. Seeds can be sown in spring or autumn directly onto the surface of damp soil, as they require light to germinate. Division is best performed in spring, separating clumps and replanting them in suitable moist conditions.\u003c\/p\u003e\n\u003cp\u003eOnce established, this plant is low-maintenance. Regular watering is essential, especially during dry periods, to maintain its preferred damp conditions. Deadheading spent flowers may encourage further blooming, while cutting back stems in late autumn tidies the plant for winter dormancy. Divide clumps every 3–4 years to prevent overcrowding and maintain vigour.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eUses\u003c\/h3\u003e\n\u003ch4\u003e\u003cstrong\u003eOrnamental:\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cem\u003eLobelia siphilitica\u003c\/em\u003e is a beautiful choice for water gardens, pond edges, and damp borders. Its vibrant blue flowers add vertical interest and contrast beautifully with other moisture-loving plants such as \u003cem\u003eIris laevigata\u003c\/em\u003e, \u003cem\u003eCaltha palustris\u003c\/em\u003e (Marsh Marigold), and \u003cem\u003eLythrum salicaria\u003c\/em\u003e (Purple Loosestrife).\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eNaturalized Planting:\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eThis plant is ideal for naturalizing in wetlands or along streams, where its bold flowers and robust growth enhance the landscape.\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eContainer Planting:\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eIts compact size and need for moisture make it a good candidate for containers placed near water features or in damp garden areas.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eEcological Value\u003c\/h3\u003e\n\u003cp\u003e\u003cem\u003eLobelia siphilitica\u003c\/em\u003e is a valuable plant for pollinators, including bees, butterflies, and hummingbirds (in its native range). Its late-season blooms provide nectar when many other flowers have faded. The dense foliage and upright growth habit offer cover for small creatures in wetland environments.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eConsiderations\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMoisture Needs:\u003c\/strong\u003e This plant requires consistently moist or waterlogged soil and is not suited to dry or well-drained areas.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWinter Dormancy:\u003c\/strong\u003e The plant dies back in winter but regrows vigorously in spring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eToxicity:\u003c\/strong\u003e While the plant is not typically consumed, it contains compounds that may be mildly toxic if ingested by humans or pets.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eSummary\u003c\/h3\u003e\n\u003cp\u003eWith its bold spikes of blue flowers, upright growth, and adaptability to wet conditions, \u003cstrong\u003eLobelia siphilitica (Blue Lobelia)\u003c\/strong\u003e is a standout addition to water gardens, pond edges, and boggy landscapes. Its ornamental appeal, ecological benefits, and ease of care make it a versatile and valuable plant for enhancing the beauty and biodiversity of aquatic environments. Whether used as a focal point or part of a mixed planting, \u003cem\u003eBlue Lobelia\u003c\/em\u003e adds late-season colour and interest to any garden.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eWhy Choose Lobelia siphilitica (Blue Lobelia)?\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eLobelia siphilitica\u003c\/strong\u003e, commonly known as \u003cstrong\u003eBlue Lobelia\u003c\/strong\u003e, is a striking and vibrant perennial that thrives in \u003cstrong\u003emoist conditions\u003c\/strong\u003e. Known for its \u003cstrong\u003ebright blue tubular flowers\u003c\/strong\u003e and \u003cstrong\u003eupright growth habit\u003c\/strong\u003e, this plant adds \u003cstrong\u003ecolor\u003c\/strong\u003e and \u003cstrong\u003etexture\u003c\/strong\u003e to \u003cstrong\u003epond edges\u003c\/strong\u003e, \u003cstrong\u003ebog gardens\u003c\/strong\u003e, and \u003cstrong\u003ewoodland borders\u003c\/strong\u003e. Its ability to thrive in wet or damp environments and attract \u003cstrong\u003epollinators\u003c\/strong\u003e makes it a great addition to any garden seeking to enhance both beauty and biodiversity.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch4\u003e\u003cstrong\u003e1. Vibrant Blue Tubular Flowers\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLobelia siphilitica\u003c\/strong\u003e produces \u003cstrong\u003ebright blue\u003c\/strong\u003e, tubular flowers that bloom in \u003cstrong\u003elate summer to fall\u003c\/strong\u003e, offering a \u003cstrong\u003ebold pop of color\u003c\/strong\u003e to your garden.\u003c\/li\u003e\n\u003cli\u003eThe flowers are \u003cstrong\u003earranged in loose, spike-like clusters\u003c\/strong\u003e, creating a striking display that draws attention and adds a vertical accent to your landscape.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlue Lobelia\u003c\/strong\u003e is especially attractive to \u003cstrong\u003epollinators\u003c\/strong\u003e like \u003cstrong\u003ebees\u003c\/strong\u003e, \u003cstrong\u003ebutterflies\u003c\/strong\u003e, and \u003cstrong\u003ehummingbirds\u003c\/strong\u003e, supporting a healthy garden ecosystem.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch4\u003e\u003cstrong\u003e2. Graceful, Upright Foliage\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eFeatures \u003cstrong\u003eelongated, lance-shaped leaves\u003c\/strong\u003e with a \u003cstrong\u003edark green\u003c\/strong\u003e color, providing a natural backdrop for the striking flowers.\u003c\/li\u003e\n\u003cli\u003eThe plant grows in a \u003cstrong\u003edense, clump-forming habit\u003c\/strong\u003e, adding \u003cstrong\u003evertical structure\u003c\/strong\u003e and \u003cstrong\u003etexture\u003c\/strong\u003e to your garden while complementing other plants in the landscape.\u003c\/li\u003e\n\u003cli\u003eThe \u003cstrong\u003efoliage\u003c\/strong\u003e remains healthy and attractive even after the blooms have faded, maintaining the plant’s appeal throughout the growing season.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch4\u003e\u003cstrong\u003e3. Thrives in Wet and Moist Conditions\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlue Lobelia\u003c\/strong\u003e is perfect for \u003cstrong\u003emoist soils\u003c\/strong\u003e or \u003cstrong\u003eshallow water\u003c\/strong\u003e (up to 15 cm \/ 6 inches deep), making it ideal for \u003cstrong\u003epond edges\u003c\/strong\u003e, \u003cstrong\u003ebog gardens\u003c\/strong\u003e, or \u003cstrong\u003ewet meadows\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eIt thrives in \u003cstrong\u003efull sun\u003c\/strong\u003e to \u003cstrong\u003epartial shade\u003c\/strong\u003e, making it adaptable to a range of lighting conditions and ensuring healthy growth and vibrant blooms in various environments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch4\u003e\u003cstrong\u003e4. Hardy and Low Maintenance\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLobelia siphilitica\u003c\/strong\u003e is a \u003cstrong\u003ehardy perennial\u003c\/strong\u003e that tolerates fluctuating water levels and varying moisture conditions, making it well-suited for diverse wetland environments.\u003c\/li\u003e\n\u003cli\u003eOnce established, it requires \u003cstrong\u003elow-maintenance\u003c\/strong\u003e, needing only regular watering and occasional deadheading to encourage continued blooming.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch4\u003e\u003cstrong\u003e5. Wildlife-Friendly\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eThe \u003cstrong\u003ebright blue flowers\u003c\/strong\u003e attract \u003cstrong\u003epollinators\u003c\/strong\u003e, such as \u003cstrong\u003ebees\u003c\/strong\u003e, \u003cstrong\u003ebutterflies\u003c\/strong\u003e, and \u003cstrong\u003ehummingbirds\u003c\/strong\u003e, helping to support the overall health and biodiversity of your garden.\u003c\/li\u003e\n\u003cli\u003eThe dense \u003cstrong\u003efoliage\u003c\/strong\u003e provides \u003cstrong\u003eshelter\u003c\/strong\u003e for small creatures like \u003cstrong\u003einsects\u003c\/strong\u003e and \u003cstrong\u003eamphibians\u003c\/strong\u003e, contributing to a thriving and diverse ecosystem.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch4\u003e\u003cstrong\u003e6. Erosion Control and Water Filtration\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eThe plant’s \u003cstrong\u003edense root system\u003c\/strong\u003e helps \u003cstrong\u003estabilize soil\u003c\/strong\u003e, making it ideal for \u003cstrong\u003eerosion control\u003c\/strong\u003e along pond banks, marshes, and wetland areas.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLobelia siphilitica\u003c\/strong\u003e also helps \u003cstrong\u003efilter water\u003c\/strong\u003e, improving water quality by absorbing excess nutrients and helping to maintain the overall health of your aquatic environment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch4\u003e\u003cstrong\u003e7. Versatile Design Use\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003ePerfect for \u003cstrong\u003ewater gardens\u003c\/strong\u003e, \u003cstrong\u003ebog gardens\u003c\/strong\u003e, \u003cstrong\u003epond edges\u003c\/strong\u003e, or \u003cstrong\u003ewoodland borders\u003c\/strong\u003e, where it can add both \u003cstrong\u003ecolor\u003c\/strong\u003e and \u003cstrong\u003estructure\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eWorks well in \u003cstrong\u003enaturalistic plantings\u003c\/strong\u003e, where its upright form and bright blooms complement other moisture-loving plants or as part of a \u003cstrong\u003ewildlife-friendly garden\u003c\/strong\u003e that supports pollinators and small creatures.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeight\u003c\/strong\u003e: 60–90 cm (24–36 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlowers\u003c\/strong\u003e: Bright blue, tubular flowers, blooming in late summer to fall\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSoil\u003c\/strong\u003e: Moist to wet soil or shallow water\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLight\u003c\/strong\u003e: Full sun to partial shade\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003eLobelia siphilitica (Blue Lobelia)\u003c\/strong\u003e is a beautiful and functional addition to any wetland or water garden. Its vibrant blue flowers, graceful foliage, and ability to thrive in wet conditions make it an excellent choice for enhancing the beauty and biodiversity of your garden.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Lincspplants","offers":[{"title":"1 \/ 7cm","offer_id":56445047406969,"sku":"MBP072-plug","price":2.6,"currency_code":"GBP","in_stock":false},{"title":"1 \/ 9cm","offer_id":56445047439737,"sku":"MBP072-9cm","price":6.8,"currency_code":"GBP","in_stock":true},{"title":"1 \/ 9cm Potted","offer_id":56445047472505,"sku":"MBP072-9cmpot","price":8.8,"currency_code":"GBP","in_stock":true},{"title":"1 \/ 1Ltr","offer_id":56445047505273,"sku":"MBP072-1ltr","price":10.72,"currency_code":"GBP","in_stock":true},{"title":"1 \/ 1Ltr Potted","offer_id":56445047538041,"sku":"MBP072-1ltrpot","price":12.67,"currency_code":"GBP","in_stock":true},{"title":"1 \/ 3Ltr","offer_id":56445047570809,"sku":"MBP072-3ltr","price":19.5,"currency_code":"GBP","in_stock":true},{"title":"1 \/ 3Ltr Potted","offer_id":56445047603577,"sku":"MBP072-3ltrpot","price":23.4,"currency_code":"GBP","in_stock":true},{"title":"1 \/ 2 x Pot \u0026 2 x Compost","offer_id":56628736229753,"sku":"MBP072-2xpot-2xcompost","price":24.0,"currency_code":"GBP","in_stock":true},{"title":"3 \/ 7cm","offer_id":56722465816953,"sku":"sku-52454170591579","price":7.41,"currency_code":"GBP","in_stock":false},{"title":"3 \/ 9cm","offer_id":56722465849721,"sku":"sku-52454170624347","price":19.38,"currency_code":"GBP","in_stock":true},{"title":"3 \/ 1Ltr","offer_id":56722465882489,"sku":"sku-52454170657115","price":30.55,"currency_code":"GBP","in_stock":false},{"title":"3 \/ 3Ltr","offer_id":56722465915257,"sku":"sku-52454170689883","price":55.58,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0966\/8263\/9737\/files\/Lobelia-siphilitica-Blue-lobelia-01-scaled.jpg?v=1767532406","url":"https:\/\/mgmgardening.com\/products\/lobelia-siphilitica-blue-lobelia-marginal-pond-plants-mbp072","provider":"MGMgardening","version":"1.0","type":"link"}