
(Centaurea cyanus)

Cornflower, Bachelor's button, Bluebottle, Basketflower
Centaurea cyanus, commonly known as cornflower or bachelor's button, is an annual flowering plant that belongs to the Asteraceae family. The plant is native to Europe and Asia, but now it is widely cultivated all over the world as an ornamental plant. The plant is known for its blue, pink, and white flowers, which bloom in summer.
12-40 inches (30-100 cm)
Cornflowers need full sun to grow properly. At least 6 hours of direct sunlight is required for healthy growth.
Cornflowers prefer a dry environment and do not require high humidity levels.
Cornflowers do not require much fertilizer. A balanced fertilizer can be applied once a month during the growing season.
Deadheading spent flowers can encourage the plant to produce more blooms. Prune back any leggy stems to promote bushier growth.
Cornflowers are generally not affected by pests or diseases. However, aphids and spider mites can sometimes infest the plants.
8-12 inches (20-30 cm)
Cornflowers require moderate watering, and the soil should be kept moist but not waterlogged. Water the plant when the top inch of soil is dry.
Cornflowers grow well in a temperature range of 60-70°F (15-21°C).
The growing season for cornflowers is from late spring to early fall.
Cornflowers are easy to grow and maintain. They are suitable for beginner gardeners.
Centaurea cyanus can be grown in USDA hardiness zones 3-11.
Centaurea cyanus is the national flower of Estonia.