Common Name: Purple Loosestrife
Scientific Name: Lythrum salicaria L.
Efforts must be made to prevent seed maturation and dispersal of plants into new areas. Additionally, no transportation, propagation, or sale of these plants is allowed. Failure to comply may result in enforcement action by the county or local municipality. Minnesota Noxious Weed Law.
Purple loosestrife is native to Europe and Asia. It was introduced to North America in the early 1800s in ship ballast and as a medicinal herb. It is now found in 40 US states.
Purple loosestrife prefers wet soils or standing water. Loosestrife plants are typically found in poorly drained soils of road right-of-ways and trails, drainage ditches, culverts, lake shores, stream banks, and a variety of wetland habitats.
Purple loosestrife reproduces both by seed and vegetative propagation which allows it to quickly invade new landscapes. Each flower spike can produce thousands of tiny seeds that are easily dispersed by wind, water, snow, animals, and humans. Purple loosestrife is found throughout Minnesota. The Minnesota Department of Natural Resources estimates that infestations have been recorded in 77 of Minnesota's 87 counties, covering 58,000 acres of lake, river, and wetland habitats. View purple loosestrife distribution in Minnesota.
Purple loosestrife aggressively invades lakes, rivers, and wetlands, creates large monocultures, and significantly decreases the biological diversity of native plant and wildlife populations.
MDA Noxious Weed Program
County Ag Inspectors