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habitatmatters.org

Purple loosestrife ​(Lythrum salicaria)
  • See MISIN species profile
  • Introduced from Eurasia via ship ballast  and intentionally as an ornamental garden plant in the 1800s.
  • This plant is illegal to sell, trade, plant, or share in Michigan, per Michigan's Natural Resources Environmental Protection Act (Part 413 of Act 451).
​
What problems does purple loosestrife cause?
Like most invasive plants on the Top 12 list for the Grand Traverse region, purple loosestrife forms monocultures that replace native plants in high quality natural areas, which in turn reduces critical food resources for birds, butterflies, and other wild creatures. Not only do purple loosestrife seeds germinate very rapidly, purple loosestrife grows faster than almost any wetland plant.  This makes it very easy for it to out-compete native species.
When purple loosestrife enters an area its stiff stems can collect debris such as silt (sedimentation).  This can dry up a shallow water habitat and make it into a terrestrial area, destroying the habitat for native aquatic animals that have been living there.  Furthermore, the stems of purple loosestrife are very unwelcoming to waterfowl and as a result waterfowl do not frequent areas with purple loosestrife.
 
What does purple loosestrife look like?
Purple can grow to 4-10 feet tall.  The leaves of purple loosestrife start out with lance-shaped leaves, but can become very variable in shape as the plant grows.  It has a woody root that can have from 30-50 stems coming from it.  Purple loosestrife has a square, woody stem and opposite leaves.  Purple loosestrife is in bloom July through October and the flowers are a vivid purple that are very easy to spot from a distance.
 
How do I manage purple loosestrife?
Once it is established, purple loosestrife is very hard to control and likely won’t completely disappear in a large patch.  The best thing to do is monitor natural areas and work to remove purple loosestrife as soon as it is spotted.  Mechanical removal is not recommended, but if done on a small patch and done very carefully (making sure that all parts of the plant are removed) it can work. 
 
Two species of Galerucella beetles can provide effective biocontrol for purple loosestrife, but will die off when the population of purple loosestrife goes down, allowing it to grow back again.

Picture
Picture

Contact US

1450 Cass Road
Traverse City, Michigan 49685
-
(231)941 - 0960
Pleasant Peninsula Design, Habitat Matters 2017 
  • Home
  • About
    • About ISN & FAQs
    • Our Team
    • Our Partners
    • ISN Board of Directors
    • Employment
    • Enewsletter
    • Blog - Notes from ISN
    • Donate to ISN
  • Events
  • ID & Report
    • Top 12 Species
    • Early Detection Species
    • Awareness Species
    • Other Invasive Species >
      • Hemlock Woolly Adelgid
      • Aquatic Invasive Species
      • Lymantria Moths (gypsy moth)
    • ID and Reporting Tools
  • Resources
    • Videos
    • Education
    • Tool Library
    • Garlic Mustard Dumpsters
    • Planting Guide/Ordinance Templates
    • Requests For Bids
    • Treatment Information
    • Other Information
    • Native Plant Seeds
    • Invasive Species in the News >
      • ISN in the News
  • Go Beyond Beauty
    • Find Participants >
      • Nurseries/Garden Centers >
        • Bioconcentric Farms
        • Birdsfoot Native Nursery
        • Black Cap Farms
        • Bright Lane Gardens
        • Garden Goods
        • Greystone Gardens
        • Misty Ridge
        • Pine Hill
      • Landscapers/Professionals >
        • Cre Woodard
        • Cyman Gardens
        • Designs in Bloom
        • Greener Earth Landscaping
        • Heritage Landscape Design
        • Inhabitect, LLC
        • Lakeview Habitats
        • Laurel Voran, LLC
        • The Mossy Tree, LLC
        • Old Mission Associates
        • Inner-Coastal
        • Pine Hill
        • Silverman & Company
        • Sustainable Landscape Design, LLC
        • TruNorth Landscaping
        • Wildlife & Wetland Solutions
      • Community Participants
    • GBB Achievement Program
    • Register >
      • Registration Form (Garden Professional)
      • Registration Form (Individual or other org)
      • Start-up Materials
      • GBB Statewide Inquiries
    • Ornamental Invasive Species
    • Native Plant Species
    • Participant Signs
    • Japanese Barberry Trade-Up Day
    • GBB Resources
  • Contact