Biology and Management of Annual Sowthistle

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Registered Herbicides

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  General Description:

• Erect, fleshy plant that grows 1 to 4 feet tall.
• Basal leaves are stalked while upper leaves clasp the stems.
• All but the upper leaves are deeply lobed with 1 to 3 lobes along each side.
• Flower heads are numerous and pale yellow, 1/4 to 3/4 inches wide.
• Seeds are flat and ribbed lengthwise.
• Tuft of fine hairs allows wind-borne dissemination.

Life cycle:

• Annual

Habitat/ Distribution/ Crops associated with:

• Introduced from Europe.
• Found throughout the western United States.
• Occur in vacant lots, roadsides, cultivated fields and gardens.

Herbicide Control Notes:

Gramoxone plus Goal, Sinbar, or Karmex/Direx is effective.