• Cosmos Rubenza Seeds
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Jig-Bee Flower Farm

Cosmos Rubenza Seeds

Tender Annual

Description

Cosmos bipinnatus

Cranberry but in cosmos form. These blooms have a muted tone that give it a velvet look. Cosmos are easy to grow - you can direct seed or start them indoors and plant them out as seedlings. Keep them blooming all season long with a little deadheading.

$ 5.95
$ 5.95
Shipping calculated at checkout.
Size

Available January 19, 2026 pending germination testing.

    Planting Instructions

    SOWING:

    Transplant: Sow indoors 5-7 weeks before planting out. Harden off and transplant out after danger of frost. Direct seed - Sow after last frost, once soil temperature is above 60°F (16°C), covering seeds lightly.

    Germination Requirements: Cover seeds lightly

    Days to Germination: Germination in 7-10 days at 68-72°F

    GROWING:

    Light Preference: Full sun

    Plant Height:   40 to 50 inches

    Plant Spacing: 6 to 12 inches; Wider spacing creates stronger, thicker stems and delays disease (e.g. powdery mildew) issues

    Pinching: Yes, pinch at 8-12” to encourage branching

    Flower Support: Strongly recommended

    Days to Bloom: 90-100 days

    HARVEST AND VASE LIFE:

    Yield: 7-15 stems

    Harvest Fresh: Harvest when buds are just cracking, but haven’t fully opened. Deadheading is required to have blooms all summer.

    Expected Vase Life: Expect a vase life of 5 to 6 days.

    USES: 

    Cut Flower, Beds/Containers/Mass Plantings, and Beneficial Insect Plantings
    Shipping Information

    Seeds are shipped via USPS. Any orders placed after 12pm on Friday or over the weekend will be filled the following week. Please allow 2-3 business days for your seed order to be processed.
    We do not ship internationally.
    Cosmos Rubenza Seeds