Amaranthus - Red Root

21/06/2026

Amaranthus powellii

Commonly known as redroot, amaranthus (Amaranthus powellii) is a serious weed of maize, other crops and orchards and is widespread throughout New Zealand. It can grow up to 1 m in height and is characterised by red coloured stem.

Commonly known as redroot (Amaranthus powellii) is the most often seen of the Amaranthus weeds in New Zealand. Able to grow very quickly up to 1 metre high, redroot is a seriously competitive weed in crops, including fodder beet.

Cotyledons:

Apex slightly pointed
Base tapered, stalked

Leaves:

Oval to rhombic, notched at tip
Reddish stem

Mature plants grow erect and upright to a 1 metre high but in challenging conditions, plants up to 5 cm will still flower. Leaves are oval narrowing at the tip with the base narrowing to the stalk.

The leaves are hairy on the underside. Has a reddish stem at the base with less branching as it gets taller. Produces numerous green flowers as inflorescences.

103456 Abdruck mit Urhebervermerk honorarfrei. Beleg bitte an: Bayer AG/UK-EM/Geb.: W4/ Bildredaktion Kaiser Wilhelm Allee 51368 Leverkusen Zurückgekrümmte Amaranth (Amaranthus retroflexus) im 3-Blatt-Stadium