Green foxtail (Setaria viridis) is a member of the large family Poaceae and is related to spelt, rice, wheat and other common grains.
Also known as green bristlegrass or wild foxtail, the annual plant’s habit depends on where it grows.
In general, green foxtail can grow up to 50 centimetres high. The spikes appear from June to October.
It grows almost horizontally along or on paths, where it tends to stay small and only grows to a height of 10 centimetres.
On less disturbed sites with better soil, its stalks point vertically upwards. Here Setaria viridis can reach heights of up to 50 centimetres.
Apart from urban areas, where it colonises paths, roadsides, walls, building sites and gardens, Setaria viridis can also be found on dams, embankments and meadows.
Its native range includes regions of Asia, Europe and North Africa. It is also an invasive species in North and South America (source).
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