Skip to main content
A picture of a Cornflower 'Black Ball'

Cornflower 'Black Ball'

Centaurea cyanus 'Black Ball'

Photo by Roosie (All rights reserved)

Full Sun
Light watering
Frost Hardy


RHS hardiness


Minimum temperature

Expected size








1 years to reach maturity


  • spring
  • summer
  • autumn
  • winter

More images of Cornflower 'Black Ball'

Some purple Centaurea cyanus 'Black Ball' flowers
Some purple Centaurea cyanus 'Black Ball' flowers and green leaves
A photo of Cornflower 'Black Ball'

Cornflower 'Black Ball' Overview

Centaurea cyanus 'Black Ball' is an annual cultivar in the daisy family, Asteraceae (Asteraceae). It typically grows to around 75cm tall, producing simple to lobed leaves and attractive deep red flowers. Blooms are solitary and measure between 3-4cm in width, they appear from late spring to summer. It has an upright habit and is hard to -20 degrees Celsius, plant in a position of full sun, in moist, well-draining soil for optimal growth. This cultivar is part of the Royal Horticultural Society “Plants for Pollinators” initiative to showcase plants which support pollinator populations by providing ample amounts of nectar and/ or pollen. A great choice for encouraging pollinating insect wildlife into your garden!

Special features of Cornflower 'Black Ball'

Attractive flowers

Attracts bees

Attracts butterflies

Attracts useful insects