Centaurea cyanus 'Black Ball'
Cornflower 'Black Ball'
Centaurea cyanus 'Black Ball' produces pincushion flowers in a rich milk-chocolate shade, that look almost black on cloudy days. Drifts of this annual cornflower add a touch of drama to summer borders and wildlife gardens where they will attract bees and butterflies to their pretty blooms. This tall variety of Centaurea makes an excellent cut flower too. Height: 75cm (30in). Spread: 30cm (12in).
|Botanical name||Centaurea cyanus|
|Common name||Cornflower 'Black Ball'|
|Flower colour||Purple, Brown|
|Plant type||Flower Seeds|
|Season of interest||Summer|
|Time to maturity||1 - 2 years|
|Ultimate height||0.1m - 0.5m|
|Ultimate spread||0.1m - 0.5m|
|Useful/additional information||Sowing Time: March to April. Sow thinly, 3mm (1/8in) deep in drills 30cm (12in) apart in well-cultivated soil which has been raked to a fine tilth. Water ground regularly, especially in dry periods. Can also be sown August to September for early summer flowering next year. Sow in pots or trays of moist seed compost and cover with a very fine sprinkling of compost or vermiculite. Keep at between 15-20C (59-68F). After sowing, do not exclude light as this helps germination. Keep the surface of the compost moist but not waterlogged; germination will usually take 14-21 days. When large enough to handle, transplant seedlings into 7.5cm (3in) pots or trays. Overwinter plants in cool, light, frost-free conditions before planting out the following spring, or grow on as greenhouse pot plants. When large enough to handle, thin out seedlings to 15cm (6in) apart.Water regularly until plants are fully established. Deadhead faded cornflower blooms to prolong the flowering period.|