Polygonum aviculare

Common Knotgrass

Description

1. Popular name(s): Common Knotgrass, Common Knodweed, Doorweed, Birdweed, Pigweed
2. Botanical name: Polygonum aviculare
3. Family: Polygonaceae
4. Origin: Asia, Europe, North America and as an introduced species in other regions
5. Height: The lying to semi-erect growing stems are between 5 and 50 centimetres long
6. USDA zone: 5 (-9.4 F/-23 °C)