Cornflower, also known as Bachelor’s Button (Centaurea Cyanus) is an annual forb in the Aster Family (Asteraceae). It’s native to Europe, blooms Jun-Aug and grows 1-3.5 ft. It tolerates dry soils and full sun exposure.
Cornflower is an endangered species in Europe. In the United States it used to grow as a weed in cornfields; now days it’s used as an ornamental and also grows in grass fields and roadsides as a weed. It’s sometimes used in wildflower seed mixes in meadows, prairies and savannas. Check your wanted and unwanted plant list before attempting any control methods to kill this plant in habitat restoration; for some states it might be a noxious weed, others are trying to save it due to the endangered status in Europe.