Photos are representative and may not match your specific variety.

Black Button

Flower

Centaurea cyanus

Overview
Upright plants produce abundant double and semidouble 1-1 1/2" blooms. Prefers cool temperatures. Also known as cornflower, garden cornflower, and bachelor's buttons. Edible Flowers: The petals are used to decorate desserts. Centaurea is also a popular choice for brightening up salad mix. Flavor is bland and mildly floral.
Planting
Direct sow after last frost or start indoors 6-8 weeks before last frost
Growing
Sun: partial. Water: low. Soil: Well-drained soil, tolerates poor to average conditions. Space plants 12" apart. Germination: 7-10 days.
Pests & diseases
Common pests: Spotted cucumber beetle, flea beetle, spider mites. Common diseases: Powdery mildew, rust, leaf spot.