Japanese Knotweed

Hamilton County Distribution

  • Roadsides
  • Stream banks
  • Disturbed locales

Identification

  • Cascading flowers bloom in the summer
  • Stems are hollow and notched
  • Leaves are leathery and heart shaped

Threats

  • Spreads by rhizomes that stretch long distances through soil
  • Early spring emergence
  • Dense stands displaces native plants
  • Causes erosion along stream banks
  • Dormant stems remain during the winter and create a fire hazard

Management

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