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Purple Loosestrife




Purple loosestrife can range from 1 to 2 meters tall. Purple flowers are arrange in a spike at the top of the plant. Many stems often grow from a single root ball in the ground.


This plant grows in thick stands that can impede shoreline access and out compete native plants.

Range Expansion:

Purple loosestrife is easily misidentified and has been known to be inadvertently sold, purchased and transported by gardeners. Anglers and hunters can spread seeds after coming into contact with the plant and its flowers.

South Dakota Distribution:

Keep Aquatic Invasive Species Out of South Dakota's Waters


  • Remove aquatic plants and animals before leaving any waterbody.
  • Drain water from bait bucket, live well, bilge and motor before leaving any waterbody.
  • Dispose of unwanted bait, fish parts, and worms in the trash.
  • Spray/wash boat, trailer, and equipment with high pressure hot water on your way home or at home -OR- dry everything for at least 5 days.
  • Always report questionable species.


  • Never release live animals or plants - this includes all aquarium species, bait, pets or water garden plants. Do not release these into the wild. If you cannot find another home for animals, dispose of them in a trash can or bury them. Seal plants in plastic bags and dispose.


Because these hitchhikers can:

  • Reduce game fish populations
  • Ruin boat engines and jam steering equipment
  • Make lakes/rivers unusable by boaters and swimmers
  • Dramatically increase the operating costs of drinking water plants, power plants, dam maintenance, and industrial processes
  • Reduce native species
  • Degrade ecosystems
  • Affect human health
  • Reduce property values
  • Affect local economies of water-dependent communities.
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