Common Tansy

QUICK IDENTIFICATION

  • Stems reddish-purple
  • Crushed leaves strongly aromatic; furry on the underside and smooth above
  • Bright yellow button-flower clusters
  • Height 1 to 6 feet


Weed Pictures



Weed Information


Type Information
Toxicity Can cause abortions in humans if ingested; can cause liver damage in some livestock, but it is largely palatable.
Control Mechanical and herbicide. Contact your County Weed District or local applicator for more information.
Habitat Full sun and moist habitats along stream banks, irrigation ditches, trails and roadsides, lawns and gardens, waste areas, vacant lots and pastures.
Root Extensive, spreading root system
Leaf Shape Alternate on stem and fern-like
Lifespan Perennial; two years or longer
Priority 2B Weed Abundant in Montana and widespread in many counties.
Similar Looking Plants Tansy ragwort and camphor tansy
Important Information Often still planted and cultivated as an ornamental. Also can be used as a natural insect repellent.
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