Cosmos bipinnatus

Cosmos Rubenza


One of the most prolific bee friendly summer bloomers, cosmos produces buckets of flowers for months on end with regular harvesting. Rubenza displays a range of vibrant colors. The large single flowers start as a deep ruby and fade to shades of terracotta and rose as they age.


30 seeds per packet.

47 in stock

    Flower type:Filler
    Life cycle:Heat-loving Annual
    Climate:Thrives in warm temperatures.
    Sowing guide:Direct sow (recommended) in spring or sow in trays and transplant after 4-6 weeks and only when soil temperatures are above 16 C.
    Planting Season:Spring / Summer
    Germination guide:7-10 days @ 21 C. Light required - cover seed with thin layer of soil.
    Good Bee Food:Yes
    Flowering time:90-100 days after sowing
    Pinch:Yes, when 30 cm high
    Position:Full Sun
    Final height:100 cm
    Spacing:30 cm

    Growing Tips:

    Provide horisontal plant support when growing in windy areas.

    Harvesting Tips:

    Harvest when the first individual flowers on a branch have openend. The still closed flowers will open over time in the vase. Plants respond well to regular cutting. Expected vase life is 4-6 days.

    Whether you are growing flowers or vegetables or both, growing your own plants from seed, is one of the most rewarding things for any gardener and you don’t even need a green thumb to do it. With our guidance, it couldn’t be easier!