Skip Maine state header navigation

Agencies | Online Services | Help

Skip First Level Navigation | Skip All Navigation

Ask the Expert Button
Home > Weeds > Redroot Pigweed

Redroot Pigweed—Amaranthus retroflexus

A common annual weed in gardens, cultivated areas and waste places.

pigweed plant pigweed root pigweed leaves pigweed flower
Plants grow erect, 2 to 4 feet tall. Lower stems and roots are often red or striped with red. Leaves have long petioles and prominent veins and are lance-shaped with wavy margins. Flowers at the top of the plant are greenish, spike-like clusters. Each plant can produce 100,000 seeds.

Click on images to view full-size

 

Identification and Control Information (will open in a new window)

More Information (each will open in a new window)

 

[Photos, left to right: Mary Ellen (Mel) Harte, , Bugwood.org; Richard Old, XID Services, Inc., Bugwood.org; Robert Vidéki, Doronicum Kft., Bugwood.org; Joseph M. DiTomaso, University of California - Davis, Bugwood.org]

 
It is the policy of the State of Maine to minimize reliance on pesticides. The Maine Department of Agriculture, Conservation and Forestry and the Maine IPM Council encourage everyone to practice integrated pest management and to use pesticides only as a last resort. The mention of pesticides in the fact sheets linked to these pages does not imply an endorsement of any product. Be sure that any product used is currently registered and follow all label directions.