Purple Loosestrife

Hamilton County Distribution

  • Roadsides
  • Ditches
  • Gardens
  • Wetlands

Identification

  • Showy, magenta flowers bloom in the summer
  • Stems are square
  • Leaves are lance-shaped

Threats

  • Spreads by seeds and rhizomes
  • Rapid reproduction displaces native plants

Management

  • Biocontrol with Galerucella beetles
  • Pull or dig small plants before they go to seed
  • For large plants, first clip flowers, then cut stems close to the ground in July and August before they go to seed
  • Place all plant material in a heavy duty plastic bag and allow to photodegrade
  • Herbicide application

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