LINCOLN SOIL AND WATER CONSERVATION DISTRICT
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Bohemian Knotweed
Fallopia x bohemica

BBohemian knotweed is a vigorous and fertile hybrid that is the result of a cross between Japanese and giant knotweed. 

​Physical Description
There is a high degree of morphological variability in Bohemian knotweed. Physical characteristics of Bohemian knotweed range from being indistinguishable from Japanese knotweed to being indistinguishable from giant knotweed, with most individuals exhibiting intermittent characteristics between the two species.

  • Broadly ovate to narrowly ovate leaves, 7-14 inches long, with a flat to heart-shaped base
  • 6-11 feet tall
  • Green segmented stems, with or without red to brown spotting, that are variable in width
  • Stout leaf hairs up to 1/2 mm long
  • The cross section of the middle leaf vein is square to slightly rounded in shape
  • Papery sheaths between stem sections
  • Hollow stems
  • Cream colored, sweet smelling, linear flower bunches at each leaf. That often appear to have a more upright appearance than Japanese or giant knotweed
Spectrum of leaf shapes of Japanese, giant and hybrid bohemica knotweed species
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​Control Efforts
Bohemian knotweed infestations take several years of treatment to control and the most effective method is repeated herbicide application. Contacting a natural resource professional as early as possible is integral to knotweed control. If you see bohemian knotweed contact the Oregon Invasives Hotline as well as Lincoln SWCD by phone at (541-265-2653) or email.

Click the link below for an in-depth summary of current knotweed control practices:
Knotweed Control Methods

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Watershed Restoration and Enhancement
Noxious Weed Control & Prevention
Water Quality & Fish and Habitat Survey Monitoring


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We've moved!
​914 SW Coast Hwy
​Newport, OR 97365

Mailing address:
Lincoln SWCD
PO Box 2273
Newport, OR 97365

​



Phone: (541) 265-2631​
Email: info@lincolnswcd.org

Office Hours: M-F 8:00 - 4:00*

​*Unless in the field. Please reach out to arrange an office visit so that we can ensure in-person availability.
  • Get Involved
  • Resources
  • District Programs and Services
    • District Programs and Services Overview
    • ODA Mid Coast Agricultural Water Quality Management
    • Watershed Restoration, Enhancement, and Assessment Overview >
      • Conservation Enhancement
    • Noxious Weed Control & Prevention Overview >
      • Invasive Species FAQ
      • Invasive Knotweeds
      • Old Man's Beard
      • Yellow Flag Iris
      • Policeman's Helmet
      • Slender False Brome
      • Yellow Archangel
    • Monitoring Programs Overview* >
      • Fish Surveying and Aquatic Habitat Asessment
      • Water Quality Monitoring
    • Siletz Basin Focus Area
    • Upper Yaquina Strategic Implementation Area
  • Who We Are
  • Native Plant Sale
  • Contact Us