Russian Knapweed

QUICK IDENTIFICATION

  • Toothed and hairy base leaves; upper leaves small and narrow with a smooth edge
  • Blue-green leaves and stems
  • One purple to pink flower per branch with light pink to white tips on each flowerhead
  • Height from 1 to 3 feet

Video Information


Weed Pictures



Weed Information


Type Information
Toxicity Toxic to horses.
Control Mechanical and herbicide. Contact your County Weed District or local applicator for more information.
Habitat Irrigation ditches, river corridors, forests, grasslands, roadsides, rangelands and pastures.
Root Extensive root system
Leaf Shape Deeply lobed lower leaves, linear upper leaves
Lifespan Perennial; two years or longer
Priority 2B Weed Abundant in Montana and widespread in many counties.
Similar Looking Plants Spotted knapweed, meadow knapweed and diffuse knapweed
Important Information Root system has a black, bark-like covering. Plant is allelopathic (inhibits growth of other plants) and develops dense stands due to its ability to out-compete resident vegetation.
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