Cornflower Double ‘Black Ball’ – Seeds

(Centaurea cyanus)

Cornflower Double ‘Black Ball’ is an annual with striking, deep black double blooms that add bold contrast to gardens and floral arrangements. Its long flowering season and compact growth make it ideal for borders, cottage gardens, and pollinator-friendly plantings. Easy to grow and low-maintenance, it also attracts bees and butterflies.

Why Grow Cornflower Double ‘Black Ball’?

• Striking deep black double blooms

• Long-flowering, compact annual

• Attracts bees and butterflies

• Ideal for borders and cut flowers

Key Features

• Type: Annual

• Height: 40–50 cm

• Flowers: Summer

• Position: Full sun

• Soil: Well-drained, moderately fertile

Ideal For

• Borders, cottage gardens, and mixed beds

• Pollinator-friendly gardens

• Cutting for floral arrangements

• Adding bold, dark contrast to plantings

Sowing & Growing

• Sow indoors: February–April in seed trays

• Sow outdoors: April–May directly in prepared soil

• Germination: 10–20 days at 18–20°C

• Spacing: 20–25 cm apart

• Care: Moderate watering; deadhead to prolong flowering