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Tansy Ragwort

Senecio jacobaea

Plant Description

Branching flower stalks with bright yellow flowers; leaves are dark green and deeply lobed.

Plant Details

Life Forms
ODA Listing
Soil and Moisture Conditions
Suggested Actions
Shade Preference
Mature Height up to 6'
Distribution Widespread through western Oregon with more limited distribution in eastern Oregon.
Control Biological control agents are well established. Hand pulling is only effective on small populations during the first year of growth. Mowing may stimulate multistemmed growth. Follow all label directions when using chemicals
Reproduction and Spread A single plant can produce up to 200,000 seeds that can remain viable up to 15 years.
Introduced This plant is native to Europe and western Asia. It was first documented in Multnomah County in 1922.
Look Alikes common tansy
Impact Plants are poisonous to livestock and often thrive in pastures
More Info
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