Tumble pigweed

Amaranthus albus L.

Life cycle

Bushy-branched summer annual.


Alternate, oval- to spatula-shaped, light green leaves have wavy margins and notched leaf tips.

tumble pigweed seedling tumble pigweed stem
Tumble pigweed seedling (left) and leaf (right).


Mostly erect and usually hairless, pale green to whitish stems with multiple branches create a bushy appearance. Stems, up to 4 feet tall, break off at the soil surface when mature and tumble with the wind.

tumble pigweed stem
Whitish stems of tumble pigweed.

Flowers and fruit

Small, greenish flowers are found in dense clusters in the leaf axils. Flowers have long bracts two to four times the length of the sepals and yield small, round, shiny black seeds.

tumble pigweed foliage tumble pigweed flowers
Tumble pigweed foliage (left) and flowers (right).



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The MSU IPM Program maintains this site as an access point to pest management information at MSU. The IPM Program is administered within the Department of Entomology, fueled by research from the AgBioResearch, delivered to citizens through MSU Extension, and proud to be a part of Project GREEEN.