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Rubenza Cosmos Seeds

Rubenza Cosmos Seeds

1246

4.2
Rated 4.2 out of 5 stars
12

Deeply colored 3" blooms are beauteous in contrast when paired with white flowers and silver-foliage plants. A Fleuroselect Novelty award winner, this cosmos is a real standout in the garden or a vase, and butterflies love them, too. Blooms start out red-wine colored and turn to dusky rose as they age. Growing cosmos is an easy way to add color to your garden, as they require little attention and are drought tolerant.

$2.69
$2.69
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~0.3 g

(~29 seeds)

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  • Variety Info
  • Sowing Info
  • Learn More

Variety Info

Family: Asteraceae

Type: Cosmos (Learn more)

Native: Mexico and Arizona

Hardiness: Annual

Exposure: Full sun

Bloom Period: Summer to frost

Plant Dimensions: 24"–32" tall, about 28" wide

Variety Info: Flowers up to 3" start out deep wine-red, turning to rose as they age.

Attributes: Attracts Butterflies, Attracts Hummingbirds, Attracts Pollinators, Cut Flower, Drought Tolerant

Non GMO Project

Sowing Info

When to Sow Outside: RECOMMENDED. 1 to 2 weeks after your average last frost date, and when soil temperature is at least 60°F.

When to Start Inside: 4 to 6 weeks before your average last frost date.

Days to Emerge: 5–10 Days

Seed Depth: Barely cover

Seed Spacing: A group of 3 seeds every 12"

Thinning: When 1"–2" tall, thin to 1 every 12"

Your hardiness zone is

4.2
Rated 4.2 out of 5 stars
Based on 12 reviews
Total 5 star reviews: 8 Total 4 star reviews: 2 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 2
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12 reviews
  • S G.
    Verified Buyer
    Rated 1 out of 5 stars
    4/21/25
    1 Star

    My packet came with 6 seeds. Very displeased.

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    BI Profile picture for Botanical Interests
    Botanical Interests
    4/28/25

    Hey Shyamalika,

    Thank you so much for taking the time to share your thoughts in a review. I've reached out to you via email to offer assistance. Your feedback is invaluable to us, and we are committed to ensuring your experience is positive. Thank you once again for your input. Keep on growing 🌻️

  • Marcene S.
    Verified Buyer
    Rated 5 out of 5 stars
    2/5/25
    5 Stars

    I grow cosmos every year. Sometimes save the seeds in the fall. These grew wonderfully and the dried winter stems are still out there making interest in the snow. Love the color of these flowers. I planted these last season. Took no pictures.

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  • Miriam T.
    Verified Buyer
    Rated 5 out of 5 stars
    8/30/24
    5 Stars

    I love the color these Rubenza cosmos add to my small rooftop garden. Even though they are in full sun, they can withstand not being watered every few days.

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    Which best describes you as a gardener? Intermediate
  • Arlene R.
    Rated 1 out of 5 stars
    8/27/24
    1 Star

    Only one seed germinated. I bought a pack for a friend who loves red. None of hers germinated.

    Was this helpful?
    Which best describes you as a gardener? Intermediate
  • Lori K.
    Verified Buyer
    Rated 5 out of 5 stars
    7/1/24
    5 Stars

    Wowsers! These are so pretty, starts off to a rich dark red then fades to a pretty dusty rose pink color! Easy to grow and I will definitely grow these again next year.

    Was this helpful?
    Which best describes you as a gardener? Intermediate