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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.

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

It is the policy of the State of Maine to minimize reliance on pesticides. The Maine Department of Agriculture 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.