Centaurea cyanus Black Ball — deep burgundy-black double cornflower blooms in a clear glass vase in front of a window with white sheers

Cornflower Blackball Seeds — Centaurea cyanus

$4.50
$4.50
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Centaurea cyanus Black Ball — deep burgundy-black double cornflower blooms in a clear glass vase in front of a window with white sheers
  • Centaurea cyanus Black Ball — deep burgundy-black double cornflower blooms in a clear glass vase in front of a window with white sheers
  • Centaurea cyanus Cornflower Blackball with classic cornflower-shaped blooms in deep dark burgundy-black growing in a cottage garden border
  • Cornflower Blackball Seeds — Centaurea cyanus
  • Centaurea cyanus Black Ball — deep burgundy-black double cornflower blooms in a clear glass vase in front of a window with white sheers
  • Centaurea cyanus Cornflower Blackball with classic cornflower-shaped blooms in deep dark burgundy-black growing in a cottage garden border
  • Cornflower Blackball Seeds — Centaurea cyanus
Cornflower Blackball Seeds — Centaurea cyanus

Cornflower Blackball Seeds — Centaurea cyanus

$4.50
$4.50

The Dark and Dramatic Cornflower

Cornflower Blackball (Centaurea cyanus 'Blackball') is a stunning and unusual annual cornflower bearing large, fully double blooms in the deepest, richest burgundy-black — a dramatic and sophisticated colour that is almost unmatched in the annual garden. Far removed from the classic blue cornflower, Blackball brings a moody, velvety depth to borders and bouquets alike, and is an absolute showstopper when cut and arranged with softer pastels or bold brights. A must-have for the cutting garden and any gardener who loves something a little out of the ordinary.

Why Gardeners Love It

  • ⚫ Large, fully double deep burgundy-black blooms — a rare and dramatic colour that commands attention in any planting or arrangement
  • ✂️ Exceptional cut flower — long stems and good vase life, stunning paired with whites, pinks, or bold colours
  • 📏 Grows 70–90 cm tall — ideal for cutting gardens, cottage borders, and mixed beds
  • 🐝 Attracts bees and butterflies — a valuable nectar source through spring and summer
  • 🌱 Easy to grow from seed — direct sow and largely self-sufficient once established

Growing Tips for New Zealand

Cornflowers are best direct sown into their final position as they dislike transplanting. Sow in autumn for spring flowering, or in early spring for summer blooms. Sow seeds 1 cm deep in a sunny, well-drained position and thin to 30 cm apart. Cornflowers are wonderfully unfussy — they thrive in average to poor soils and need little feeding. Deadhead regularly to extend flowering. Performs beautifully throughout NZ in any sunny, open position.

What's in the Packet

Each packet contains 10 seeds of Cornflower Blackball (Centaurea cyanus 'Blackball').

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