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Sea Shells Blend Cosmos Seeds

Sea Shells Blend Cosmos Seeds

2034

4.5
Rated 4.5 out of 5 stars
29

These charming cosmos with fluted, seashell-shaped petals will be a beautiful addition to your flower patch! In shades of white, pink, rose, and crimson, they make an excellent cut flower. Easy to care for; once established they are drought tolerant. They prefer neglect over attention, making them a perfect choice for wildflower or naturalized areas.

$3.49
$3.49
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~0.4 g

(~48 seeds)

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  • Variety Info
  • Sowing Info
  • Growing Info
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Variety Info

Family: Asteraceae

Type: Cosmos (Learn more)

Native: Mexico and Arizona

Hardiness: Annual

Exposure: Full sun

Bloom Period: Summer to frost

Plant Dimensions: 3'-5' tall, 18"-36" wide

Variety Info: 3"–4" solid colored (and a few bi-colored) blossoms of white, pink, rose, and crimson, with rolled, quilled petals surrounding yellow centers

Attributes: Attracts Hummingbirds, Attracts Pollinators, Cut Flower, Drought Tolerant, Deer Resistant

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

Growing Info

Harvesting: For longest vase life, harvest in the morning and cut stems just as flower buds begin to open.

4.5
Rated 4.5 out of 5 stars
Based on 29 reviews
Total 5 star reviews: 25 Total 4 star reviews: 0 Total 3 star reviews: 1 Total 2 star reviews: 0 Total 1 star reviews: 3
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29 reviews
  • Adrienne
    Verified Reviewer
    Rated 5 out of 5 stars
    11/25/25
    Lovely, fascinating, wish they were native.

    So very pretty!!! Some taller than me! Lush bright greenery with very pretty two-toned pink tubular petaled-flowers. Bright yellow center. Cosmos always lovely but this version has a Very interesting flower! Friends are amazed by these, having never seen another flower like this! These don't last after cutting in a vase as long as single cosmos, who can last many days, these are a couple days in my experience. Now that I'm getting clued in on planting native I'm realizing would prefer to promote and pamper local plants for the local critters. But these seashell cosmos are really beautiful, unique, and easy to take care of, in Denver.

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    Which best describes you as a gardener? Intermediate
    BI Profile picture for Botanical Interests
    Botanical Interests
    11/25/25

    Hey Adrienne,

    Thank you so much for taking the time to share your experience with our Sea Shells Blend Cosmos Seeds! We love hearing that they grew taller than you and produced those stunning two-toned pink tubular flowers that have your friends amazed. We totally understand your point about the shorter vase life compared to regular cosmos, but it sounds like they're absolutely gorgeous in the garden. We also appreciate your thoughtfulness about native plants and supporting local ecosystems - that's such an important consideration for gardeners. Thanks for sharing your beautiful growing experience with us in Denver. Keep on growing 🌻️

  • Lisa P.
    Verified Buyer
    Rated 5 out of 5 stars
    11/15/25
    Beautiful!

    This variety is gorgeous. I love the shape of the petals.

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    Which best describes you as a gardener? Intermediate
    BI Profile picture for Botanical Interests
    Botanical Interests
    11/24/25

    Hey Lisa,

    Thank you so much for taking the time to share your experience with our Sea Shells Blend Cosmos Seeds! They really are beautiful! It's wonderful that you're enjoying the gorgeous blooms this variety produces. Thanks for sharing your growing success with us. Keep on growing 🌻️

  • Stephanie V.
    Verified Buyer
    Rated 5 out of 5 stars
    11/4/25
    Fall blooms in zone 10a

    Such a joy

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    Which best describes you as a gardener? Beginner
    BI Profile picture for Botanical Interests
    Botanical Interests
    11/6/25

    Hey Stephanie,

    Thank you so much for this fantastic 5-star review! "Such a joy" with fall blooms in zone 10a is exactly what we love to hear about Sea Shells Blend Cosmos Seeds - and we absolutely love that you've discovered how these unique shell-shaped petals can bring such happiness to your garden during the fall growing season!

    That's exactly the kind of delightful experience that makes Sea Shells Blend Cosmos such garden treasures! There's nothing quite like having cosmos that bloom beautifully in warmer zones during fall months, providing those distinctive fluted, shell-like petals in gorgeous mixed colors that create such a joyful display when other flowers might be winding down!

    Your fall blooming success in zone 10a will be so inspiring for other warm-climate gardeners who want to discover just how rewarding and cheerful Sea Shells Blend Cosmos Seeds can be for creating those unique, shell-petaled displays that bring pure joy to the garden during extended growing seasons!

    Keep on growing 🌻️

  • Eric W.
    Verified Buyer
    Rated 5 out of 5 stars
    3/9/25
    5 Stars

    Just planted these today but I love the variety and have confidence they’ll germ.

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  • LISA
    Verified Buyer
    Rated 5 out of 5 stars
    2/28/25
    5 Stars

    Amazing seeds

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