Mr Fothergill’s Cosmos Rubenza Seeds

Mr Fothergills Cosmos Rubenza Seeds Dark Ruby to Old Rose Summer Blooms

Mr Fothergills Cosmos Rubenza Seeds (Cosmos bipinnatus) produce striking dark ruby-red flowers that gradually mature to a soft old rose, giving each plant a unique tonal effect. This half-hardy annual is perfect for borders, containers, and cutting gardens, offering manageable mid-height growth and long-lasting summer colour.

Key Features

• Unique Colour Change Dark ruby blooms fade to old rose as flowers mature, creating a natural gradient effect.
• Pollinator-Friendly Nectar-rich flowers attract bees, butterflies, and other beneficial insects.
• Half-Hardy Annual Flowers the same year as sowing, providing rapid summer colour.
• Ideal for Cutting Perfect for fresh bouquets or indoor arrangements.
• Mid-Height & Manageable Grows to 90cm (36in), ideal for borders, containers, or random planting patterns.
• Full Sun Requirement Thrives in bright, sunny positions for best flowering.

Product Description

Cosmos Rubenza (Cosmos bipinnatus) is a vibrant half-hardy annual that adds drama and elegance to summer gardens. Its dark ruby-red blooms gradually soften to old rose, producing a dynamic, tonal display throughout the flowering season from June to October. Growing to a manageable 90cm (36in), these plants are perfect for borders, containers, or cut flower displays. They are highly attractive to pollinators, supporting garden wildlife while adding continuous summer colour. A Best Buy variety recommended by gardening press and consumer groups, Cosmos Rubenza thrives in full sun and well-drained soil, making it both beautiful and easy to grow.

Specifications

• Brand: Mr Fothergills
• Variety: Cosmos Rubenza
• Botanical Name: Cosmos bipinnatus
• Seed Count: Approx. 50 seeds
• Plant Type: Flower Seeds / Half Hardy Annual
• Genus: Annuals / Bedding
• Plant Class: Half Hardy Annual
• Growth Habit: Tall / Mid-Height
• Height: 90cm (36in)
• Flower Colour: Dark Ruby to Old Rose
• Position: Full Sun
• Suitable For: Borders, Containers, Cut Flowers, Pollinator Gardens
• Attractive To: Bees, Butterflies
• Sow Indoors: FebruaryApril
• Sow Outdoors: AprilMay
• Flowering / Harvest Period: JuneOctober

Growing & Care Tips

• Sow seeds indoors before the last frost or directly outdoors after frost risk has passed
• Plant in well-drained soil with full sun exposure
• Water moderately until seedlings are established
• Space plants adequately to allow airflow and prevent flopping
• Deadhead regularly to encourage prolonged flowering

Why Choose These Seeds?

Mr Fothergills Cosmos Rubenza is perfect for gardeners who want unique, colour-changing blooms with pollinator appeal. With manageable height, suitability for containers and borders, and long-lasting cut flower potential, these seeds add summer drama, beauty, and versatility to any garden.