IPMP3.0, Oregon State University, Copyright 2000

Common Groundsel Asteraceae (Senecio vulgaris)


Biology and Management

Registered Herbicides

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Common Groundsel (link to large image) Common Groundsel (link to large image)
Common Groundsel Seedling Common Groundsel Flowers and Seeds
Common Groundsel (link to large image) Common groundsel is a winter or summer annual, but may act as a biennial.  Plants have simple or branched upright growth, 6 to 18 inches tall. The foliage is generally smooth but may have light pubescence. Flowers are yellow. Seeds germinate in early spring - late fall and 3 to 4 generations may develop in one season. The cotyledons and young leaves on seedlings are purple on the underside. Young plants appear as rosettes. Flowers in April - October. Seed can mature in opened flowers even after the plants have been killed. Common groundsel contains the same pyrrolididine alkaloids found in tansy ragwort. Biotypes have evolved that are resistant to some herbicides. This weed prefers cool and wet environments with nutrient rich soil. Common in mint west of the Cascade Mountains.
Common Groundsel Mature Plant Description

This section contains information on identification of the different life stages of Common Groundsel. Select Biology and Management from the Contents Menu for more information on the biology and management, or select Registered Herbicides for the herbicides that are registered to control this weed in mint.