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Extension > Garden > Diagnose a problem > Is this plant a weed? > Broadleaf Weeds > Upright > Purple Loosestrife

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Purple Loosestrife

Lythrum salicaria L.

  • Image: broadleaf Plantain
  • Image: broadleaf Plantain
  • Image: broadleaf Plantain

Found in:

  • Sunny areas with moist soil, near shorelines, in wetlands


  • Perennial that grows up to 7’ tall
  • Upright stems are square and covered with tiny hairs
  • Leaves are long, narrow, hairy, and sharply pointed at the tip
  • Leaves arise alternately along stem
  • Violet-purple spike-like flowers bloom June to Sept.
  • Fibrous root system forms a dense mat
  • New plants can grow from small root or stem pieces


Plants that look similar:

  • Blazing Star
  • Cardinal Flower
  • Vervain

More information and control options for Purple Loosestrife

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