Genus name presumably comes from the Greek word lythron meaning blood with reference to the color of the flowers. It is best planted in the spring and fall months, although its hardiness means it can survive being planted in mild periods in winter. Zell, CC BY-SA 3.0, via Wikimedia Commons. A number of cultivars, such as the popular ‘Morden Pink’ have been marketed over the years as sterile plants, but there is evidence that some of these cultivars may interbreed. Purple loosestrife can grow up to a meter tall in their first year of growth, but require 2 to 5 years to reach full height. Other names include spiked loosestrife and purple Lythrum. It should not be confused with other plants sharing the name loosestrife that are members of the family Primulaceae. It was introduced from Europe in the 1800s as a perennial garden plant. Magenta flowers appear in dense terminal spikes (to 18” long) over a long summer to early fall bloom period. Lythrum salicaria or purple loosestrife is a flowering plant belonging to the family Lythraceae. Item number: XHT1084 What is purple loosestrife Purple loosestrife (Lythrum salicaria) is a fast-spreading, tall Eurasian plant that grows primarily in wetlands and ditches, but can invade home gardens. of the Interior, Fish and Wildlife Service. from seed contained in ships’ ballast, and it became established in certain estuaries in the northeastern states by the early 1800s. It is believed to have been first introduced into the U.S. ![]() Downy, stemless, lance-shaped leaves (to 4” long) are opposite or sometimes in whorls of three. Spread, impact, and control of purple loosestrife (Lythrum salicaria) in North American wetlands. Lythrum salicaria, commonly called purple loosestrife, is a clump-forming wetland perennial that is native to Europe and Asia. It typically grows 2-4’ tall on stiff upright stems. ![]() The problem is that it is so invasive that it can rapidly colonize wet areas and both choke out native vegetation and destroy wildlife habitat. In full flower, a colony of purple loosestrife produces spectacular bloom. ![]() It has gradually spread throughout much of the United States, particularly in marshes, swamps, pond peripheries, ditches and wet meadows. Although many alien invasive plants have naturalized by escaping gardens, purple loosestrife basically began naturalizing on its own in rural areas. Plants in northern regions are smaller and flower earlier than those in southern regions. from seed contained in ships’ ballast, and it became established in certain estuaries in the northeastern states by the early 1800s. Description Purple loosestrife has evolved to tolerate the shorter growing season and colder weather of the central and northern parts of the provinces. Lythrum salicaria, commonly called purple loosestrife, is a clump-forming wetland perennial that is native to Europe and Asia.
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