Cosmos bipinnatus Rubenza — deep ruby-red single blooms with buds and half-open flowers in a clear glass vase in front of a bright window

Cosmos bipinnatus 'Rubenza' Seeds

$4.50
$4.50
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Cosmos bipinnatus Rubenza — deep ruby-red single blooms with buds and half-open flowers in a clear glass vase in front of a bright window
  • Cosmos bipinnatus Rubenza — deep ruby-red single blooms with buds and half-open flowers in a clear glass vase in front of a bright window
  • Cosmos bipinnatus Rubenza with deep ruby-red and dark crimson blooms on long stems with feathery green foliage in a cottage garden
  • Cosmos bipinnatus Rubenza — extreme close-up of a single deep ruby-red bloom with bright golden-yellow central disc
  • Cosmos bipinnatus Rubenza — deep ruby-red single blooms with buds and half-open flowers in a clear glass vase in front of a bright window
  • Cosmos bipinnatus Rubenza with deep ruby-red and dark crimson blooms on long stems with feathery green foliage in a cottage garden
  • Cosmos bipinnatus Rubenza — extreme close-up of a single deep ruby-red bloom with bright golden-yellow central disc
Cosmos bipinnatus 'Rubenza' Seeds

Cosmos bipinnatus 'Rubenza' Seeds

$4.50
$4.50

Rich Ruby Red — A Cosmos Like No Other

Cosmos bipinnatus 'Rubenza' is a showstopping variety that brings deep, jewel-toned colour to the cottage garden. Each large bloom opens in a rich ruby-red that softens to warm dusky rose-pink as the flower matures, creating a beautiful gradient of colour across the plant at any one time. The blooms have a velvety, luminous quality that is simply stunning in the border and extraordinary in a vase. Feathery, fine-cut foliage adds to the airy, romantic feel that cosmos is loved for. A must-have for anyone who wants something bold, beautiful, and a little bit different.

Why Gardeners Love It

  • 🌹 Rich ruby-red blooms that soften to warm rose-pink as they mature — a beautiful, ever-changing jewel-toned display
  • ✂️ Outstanding cut flower — long stems and a deep, velvety colour that makes a dramatic statement in any arrangement
  • 🌿 Feathery fine-cut foliage — light and airy, adding movement and texture to borders and bouquets
  • 🐝 Excellent for bees and butterflies — a magnet for pollinators throughout summer and autumn
  • 🌱 Easy to grow from seed — fast-growing, free-flowering, and self-seeds gently in the right conditions

Growing Tips for New Zealand

Sow indoors 4–6 weeks before the last frost, or direct sow in spring once soil has warmed. Sow seeds on the surface of moist seed-raising mix and cover lightly. Transplant seedlings to 30–45 cm apart in a sunny, open position with well-drained soil. Cosmos thrives in poor to average soils — avoid overfeeding which encourages lush foliage at the expense of flowers. Deadhead regularly to extend flowering from summer right through to autumn. Performs beautifully throughout NZ in any warm, sunny position.

What's in the Packet

Each packet contains 5 seeds of Cosmos bipinnatus 'Rubenza'.

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