Centaurea cyanus, commonly known as cornflower, is an annual in the family Asteraceae, native to Europe. In the past it often grew as a weed in fields of grain. It is now considered to be endangered in its native habitat by over use of herbicides. I am very familiar with these flowers but haven’t grown them from seed before. I have sown twenty each of Blue Ball and Black Ball, into a tray of moist compost. They shouldn’t need heat but do need light. These Annuals are usually sown directly into the garden in September but I am trying to start a few now. We shall see. 11th Feb – All of the seeds have germinated already after five days. 16th Feb – All potted on. Update = All of these seedlings have keeled over and died. I shall try direct sowing later.