Rubenza
Cosmos Seed
Product ID: 3438
Unique and elegant color.
As blooms mature, petals fade from a deep cranberry to an antique rose with hints of amber. The medium-height plants are very productive, flowering early and continuing to bloom for several weeks if cut or deadheaded. 2 1/2–3 1/2" blooms. Fleuroselect Novelty 2008. Ht. 36–48". Avg. 3,300 seeds/oz. Packet: 50 seeds.
https://www.johnnyseeds.com/flowers/cosmos/rubenza-cosmos-seed-3438.11.html
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DAYS TO GERMINATION: 7-10 days at 68-72°F (20-22°C)
SOWING: Transplant - Sow into 50-cell plug flats or preferred seedling container 5-7 weeks before last frost, covering seeds lightly. Harden-off and transplant outdoors after last frost. Direct seed - Sow after last frost, once soil temperature is above 60°F (16°C), covering seeds lightly. Pinching encourages branching.
LIGHT PREFERENCE: Sun.
PLANT HEIGHT: Varies. Tall varieties may benefit from some wind protection.
PLANT SPACING: 9-12". Wider spacing creates stronger, thicker stems.
HARDINESS ZONES: Annual.
HARVEST: Petals just opening, but not yet flattened. Deadheading is required to have blooms all summer.
SOIL REQUIREMENTS: Any soil.
USES: Excellent cut flowers. Beds, containers, and mass plantings.
SCIENTIFIC NAME: Cosmos bipinnatus
SOWING: Transplant - Sow into 50-cell plug flats or preferred seedling container 5-7 weeks before last frost, covering seeds lightly. Harden-off and transplant outdoors after last frost. Direct seed - Sow after last frost, once soil temperature is above 60°F (16°C), covering seeds lightly. Pinching encourages branching.
LIGHT PREFERENCE: Sun.
PLANT HEIGHT: Varies. Tall varieties may benefit from some wind protection.
PLANT SPACING: 9-12". Wider spacing creates stronger, thicker stems.
HARDINESS ZONES: Annual.
HARVEST: Petals just opening, but not yet flattened. Deadheading is required to have blooms all summer.
SOIL REQUIREMENTS: Any soil.
USES: Excellent cut flowers. Beds, containers, and mass plantings.
SCIENTIFIC NAME: Cosmos bipinnatus
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Quick Facts
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Latin Name
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Cosmos bipinnatus
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Days To Maturity
Average number of days from seeding date to harvest, within a specific crop group. If a transplanted crop: average number of days from transplant date. Not sure if crop is direct-seeded or transplanted? Check the Growing Information box for details. If crop can be both direct-seeded or transplanted, days to maturity refers to direct seeding. Days to maturity for all flowers and herbs is calculated from seeding date. -
75 - 90 Days
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Life Cycle
Plants can be Annuals (single growing season), Perennials (grow year after year), Tender Perennials (grow year after year in warmer climates; and in some cases when given special protection in colder climates), or Biennials (require two years to mature). -
Annual
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Hybrid Status
Hybrid: The offspring of a cross between two or more distinct parent lines, usually of same species, and selected for improved traits.
Open-pollinated: A non-hybrid variety that can reproduce itself in kind, demonstrating relatively stable traits from one generation to the next. -
Open Pollinated
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Product Features
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Use for Cut Flowers and Bouquets
- Variety good for fresh cut-flower displays.
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Attracts Beneficial Insects
- Variety attracts and supports pollinators and/or insects that prey on garden pests.
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