Centaurea cyanus is an annual plant growing to 20–100 centimetres (8–39 in) tall, with grey-green branched stems. The leaves are lanceolate and 3–10 cm (1–4 in) long. The flowers are most commonly an intense blu… See more

Centaurea cyanus is native to temperate Europe, but is widely naturalized outside its native range.
It has been present in Britain and Ireland as an archaeophyte (ancient introduction) since the … See more

Centaurea cyanus is considered a noxious weed in arable crops, especially cereals and rapeseed. In winter wheat, one plant per m can cause a yield loss of up to 30 kg / ha. Centaurea cyanus produces around 800 seed per pl… See more