Purple loosestrife (Lythrum salicaria) is listed as a noxious weed in nearly every state in the U.S, and is therefore illegal to sell, buy, trade or transport. Lythrum Lythrum. Purple loosestrife (Lythrum salicaria) flowers June – September. Botanical name. Lythrum salicaria is listed as an exotic weed in Illinois (525 ILCS 10/3, 10/4) making it illegal to buy, sell or distribute plants, its seeds, or any part without a permit. Purple loosestrife 'Robin', Dye plant 'Robin' Genus. Purple Loosestrife (Lythrum Salicaria Rosy Gem) - This attractive perennial produces a showy display of carmine-colored flower spikes throughout much of the summer. Lythrum salicaria 'Robin' Other names. According to the U.S Forest Service, Invasive species have contributed to the decline of 42% of U.S. endangered and threatened species, and for 18% of U.S. endangered or threatened species. Lythrum needs water and … Lythrum plants were brought to North Dakota for flower gardens because of their striking color, ease of growth, winter hardiness, and lack of insect or disease problems. The Purple Loosestrife flower inhabits reed swamps, margins of lakes and slow-flowing rivers, ditches and marshes. It can grow up to 120 cm tall. It was introduced to the United States and Canada as an ornamental for wetlands in the 1800s. Lythrum plants are hardy perennials that can reach an height of 150 cm.. By streams,rivers and lakes. The name, lythrum, comes from the Greek for blood, in reference to the color of the flowers in some species. Lythrum salicaria (Purple Loosetrife) is listed in the Invasive Plant Atlas of the United States. Bibliography. Purple Loosestrife ( Lythrum Salicaria) Purple Loosestrife is a very colourful flower which will send up spires of reddish-purple flowers from June though to August. In Spring divide plants if necessary and apply a thick mulch. It is believed to have been first introduced into the U.S. from seed contained in ships’ ballast, and it became established in certain estuaries in the northeastern states by the early 1800s. It made its way over from Europe in the 1800’s. Lythrum salicaria L. var. It infests waterways across the entire continental U.S. (with the exception of Florida below the panhandle) and Canada below the Arctic Circle. The restoration of sites depends on these non-target species as they recolonize the area after the purple loosestrife is eliminated. Bender, J.; Rendall, J. Lythrum salicaria: element stewardship abstract. The plant was sold in North Dakota by its genus name Lythrum for at least 50 years. Variety or Cultivar 'Robin' _ 'Robin' is a tall, clump-forming, herbaceous perennial with erect, branching stems bearing linear to lance-shaped, mid- to dark green leaves and slender, spike-like racemes of deep pink to purple-pink flowers from early summer into early autumn vulgare DC. Lythrum salicaria, commonly called purple loosestrife, is a clump-forming wetland perennial that is native to Europe and Asia. The purple loosestrife plant (Lythrum salicaria) is an extremely invasive perennial that has spread throughout the upper Midwest and Northeastern United States.It has become a menace to the native plants in the wetlands of these areas where it chokes out the growth of all its competitors. It spreads mainly by seeds where a 60-70% survival rate is not uncommon. Click on a scientific name below to expand it in the PLANTS Classification Report. They are an invasive species in many areas in Northern America, and growing them is banned in the garden. Lythrum Care and Growing. Pruning in Autumn will prevent the spread of unwanted seed. Glyphosate is a non-selective herbicide, and extreme care must be taken to avoid contact with non-target plant species. Planting, sale, or other distribution without a permit is also prohibited in Indiana ( 312 IAC 14-24-12 ). Care. How to Grow Lythrum Plants in your Garden Gardener's HQ Guide to Growing Loosestrife and Purple Willow Herb. Pruning can be done in Autumn or Spring, cutting down the plant to just a few centimetres high. Classification. Purple loosestrife, a beautiful garden plant with an aggressive nature, was first introduced into North America in the early 1800s. The plant will grow in rich, marshy areas.