Diablo Cosmos Seeds

Organic, Heirloom

5 out of 5 stars
(4 reviews)
Availability: In Stock
Vibrant, bold blossoms on tall stems make a big statement in the garden. Cosmos put on a big show from midsummer until first fall frost, providing pollen and nectar for bees, hummingbirds, and butterflies. Grows loads of cut flowers for your bouquets. A great choice for wildflower areas, as they are drought tolerant and practically care-free. A 1974 All-America Selections winner.
$2.69 500 mg (~60 seeds)

Botanical Name: Cosmos sulphureus

Family: Asteraceae

Native: Mexico

Hardiness: Annual

Plant Dimensions: 4'–5' tall

Variety Information: 1–1½" bright, scarlet/orange blossoms

Exposure: Full sun

Bloom Period: Summer to frost

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

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"

Harvesting: For longest vase life, cut stems just as flower buds begin to open.

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Diablo Cosmos Seeds Reviews

4 reviews

Most fun cosmos!

5 out of 5 stars Jul 25, 2018
Year after year, these come back from seed (I always add more too!) - the finches love the seeds - the plants grow 5' tall and are covered with bright yellow and orange flowers - the foliage alone is wonderful in flower arrangements. I deadhead some and toss them to the ground but the birds love the seeds. I won my first blue State Fair ribbon with one of these delightful flowers!
KristinThompson from NM

Beautiful blooms on tall plants, even in only 4 hours of sun

5 out of 5 stars Jun 30, 2019
This is the 2nd year I've grown these. The bees love the orange and yellow blooms. The new area I sowed these only gets about 4 hours of sun, and they look just as good as the more sunny areas. Dark green lush foliage that does a good job of blocking out sunlight for any weeds. Diablo Cosmos and California Giants Zinnias are my two favs from this vendor. EVERYTHING germinates.
Keith Y from TX

Diablo Cosmos seeds

5 out of 5 stars Sep 6, 2019
Loren Miller from NE

Beautiful and sturdy

5 out of 5 stars Jun 11, 2021
I sew Diablo Cosmos seeds in the small containers in early Mar. They started blooming in mid May, at the height of 30". I don't think they will grow higher up to 4-5feet in the small containers and this is what I really enjoy. Grow them in the full sun and move the containers to the shade so the shady area can be bright with these lovely tiny flowers. They are sturdy, no need stakes, their leaves are flat parsley-like. Their petals are concave like clam shells and long lasting. Thanks to Botanical Interest for this great pack. It makes summer in this hot zone 10 cheerful.
Thimy N. from CA

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