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Centaurea cyanus 'Black Ball'


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Key information

Plant type

Hardy annual

Flower colour






Skill level


Centaurea cyanus 'Black Ball'

Plant details

If you thought all cornflowers were blue then think again. 'Black Ball', as its name suggests, produces lovely rich milk-chocolate coloured blooms on thin wiry stems. Plants sown in August or September should produce blooms in early summer. This plant looks most effective when placed in clumps in borders, especially when surrounded by lighter coloured foliage or flowers.

Family: Asteraceae

Genus: Centaurea

Species: cyanus

Cultivar: Black Ball

Plant type: Hardy annual

Flower colour: Purple

Foliage colour: Blue-green

Feature: Flowers

Sun exposure: Full sun

Soil: Well-drained/light

Hardiness: Hardy

Skill level: Beginner

Height: 75cm

Spread: 30cm

Time to plant seeds: September to April

Flowering period: June to August

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