It grows up to 1 m high, and has narrow, lancet-shaped leaves 8–10 cm long. The leaves often have a brown or black spot. The white, pink or red flowers are in dense panicles and flower from early summer to late autumn. This plant contains persicarin and tannins. In medicine, Redshank is used against diarrhoea and infections. The leaves and young shoots may be eaten as a palatable and nutritious leaf vegetable. A yellow dye can be produced from this plant.
It is native to Europe and Asia.It is often seen as a weed and rarely cultivated.