Cornflower (Centaurea cyanus) is an easily grown hardy annual that is quick to grow and blooms in summer, bearing masses of pretty, ruffled flowers on slender wiry stems. Cornflowers can be different shades of blue, as well as pink, maroon, and white. The are upright in habit, with plant height ranging from 30cm up to 120cm. The taller ones make good cut flowers and cornflowers are an easy-to-grow addition to a cutting garden patch. 
Grow cornflower plants in sun and well-drained soil, sowing seed directly into weed-free ground or into pots, in spring. Thin out the resulting seedlings. After that, little care is needed apart from deadheading to encourage more blooms.