Cosmos Seeds

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SKU
AM015848
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Cosmos lights up the garden or meadow in midsummer with pink, crimson and white flowers that hold until frost on tall plants. Attractive to both butterflies and hummingbirds, its colorful and abundant blooms are easy to grow in any region. Cosmos is a popular cutting flower with ferny foliage and strong stems and looks lovely planted along a fenceline. All of the seed we carry at American Meadows is non-GMO, neonicotinoid-free and guaranteed to grow.
Zones 2 - 10
Advantages
bee-friendly
Bee Friendly
attract-butterflies
Attract Butterflies
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Native
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Great For Mass Plantings
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Extended Bloom Time (more than 4 weeks)
multiplies--naturalizes
Multiplies / Naturalizes
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Easy To Grow
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Low Maintenance
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Good For Cut Flowers
containers
Good For Containers
Light Requirements
full-sun
Full Sun
half-sun--half-shade
Half Sun / Half Shade
Mature Height 12-72" tall (1-6' tall)
Bloom TimeMid summer to frost
SKUAM015848

USDA Hardiness Planting Zones

To determine if a plant is sufficiently cold hardy, the USDA created numbered zones indicating winter low temperatures; the lower the zone number the colder the winter.

  • If the coldest winter temperature expected in your area is -15°F (zone 5) then any plants rated zones 3-5 will survive the winter temperatures in your area.
  • If you live in very warm winter areas (zones 9-11) plants with zones 3-4 ratings are not recommended. The lack of freezing winter temperatures do not provide a time for winter dormancy (rest).

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Plant Information

One of the finest colormakers in any wildflower meadow, and a big favorite for roadside plantings since these large flowers make such a colorful show. One of the best flowers for cutting. Heavy bloom begins in midsummer and plants and flowers constantly increase until killed by frost. This is the "wild cosmos," the original form with tall plants and big daisy flowers in three colors--pink, white and maroon. Bloom is non-stop from mid-summer until frost. Plant anywhere in full sun or partial shade, in almost any soil.

The Cosmos Craze: New rage for an old favorite. When it comes to annuals, probably no plant adds more color than cosmos. Your grandmother grew it, today states plant masses along roadsides, and everybody loves it. (Birds love it too, especially goldfinches.) But there's always been one big problem--it's tall, sometimes very tall--up to 6 or 7 feet.

In the right setting, say a wildflower meadow in late summer, nothing's more beautiful than a sea of these big ferny plants waving in the wind, loaded with big blooms in pink, white and maroon. But in gardens, most people prefer shorter flowers. So for awhile, some relegated the "tall" cosmos to the group that's usually called "old fashioned flowers"--beautiful, surely, but a bit tall and rangy for our more sophisticated flower borders today.

Enter the hybridizers. With all that color and such ease of care to work with, they have had a heyday with cosmos. Today, there are all sorts of variations on the originals, some with new-style flowers, and others with simply the classic blooms on shorter plants. All require full sun, and are among the simplest plants on the planet to grow from seed. By the way, even the seeds of cosmos are distinctive; they look like miniature pine needles.

The originals are wildflowers, of course, and are native to our own southwest and more commonly, Mexico. This tells you cosmos don't mind hot dry, conditions. In fact, some consider cosmos desert plants. But they're incredibly adaptable. And ever since some plant explorer gathered seeds from the rocky wilds of Mexico and transplanted them into "good garden soil," the world has known that they not only thrive, but enjoy our loamy, well-watered gardens. And if they're not fertilized too much, they rapidly develop into large branching plants with deep green fern-like leaves. If you have a dry season, cosmos plants don't care, and revert to their drought-tolerant roots. Best of all, no matter where they're growing, they cover themselves with more and more wide (up to 4") daisy-like blooms from midsummer on. Only a hard frost stops the cosmos parade. They're fantastic as a blooming screen, or a background for shorter plants. And the big bonus: a grand stand of this garden classic in late summer can provide months of long-stemmed cut flowers for a whole neighborhood.

The Originals. There are scores of native cosmos species, most all native to the Americas, but there are only two that have entered our gardens in a big way:
1. Cosmos bipinnatus, the big one. This is the granddaddy of them all. Hailing from Mexico, it's one of the few wildflowers that is so beautiful it was taken into gardens long ago just as it is in the wild. The old name for this garden classic is simply "Wild Cosmos", "Cosmos Sensation," or "Sensation Mix," since the seeds always produce plants blooming in pastel pink, white, and deep red or maroon, all with bright yellow centers. These are the tall, (to 6 or 7 ft.) graceful cosmos plants of your grandmother's garden.
2. Cosmos sulphureus, the other cosmos. This one's shorter, with more bushy plants and somewhat smaller yellow (to orange) semi-double flowers. It's often called "Sulphur Cosmos" or "Orange Cosmos," and an old variety with particularly glowing orange blooms is called "Bright Lights." The flowers of these often remind me of open-style marigolds on larger plants.

The New Cosmos. Today, the old standard "mixture" flowers of C. bipinnatus have been segregated, and the plants grow from only 3 to 5 feet. So if you particularly like the old pastel pinks, there's "Pinkie," for the pure white, "Purity," and for the old deep rose or maroon, "Radiance." Even though the plants are shorter, all the flowers are still big and beautiful with the familiar bright yellow centers. And this new group doesn't stop with the old basic colors. "Gloria" is a beauty in pink with red-flared centers. And "Daydream" gives you the old pastel pink, but with a darker center flare and darker pink veins all through the petals.

If 3-5 feet is still too tall for you, choose the "Short Cosmos Mix" which gives you all three of the old mixture colors at just 2 to 4 ft. And yes, the flowers are still full size.

Want more variety? Pick "Dazzler" and enjoy unique blunt-tipped daisies in true red, still with the dazzling yellow center, on plants to 5 ft. Then there's the most unusual of all, "Seashells," a big hit with cosmos lovers--its hot pink petals are curled upward at the edges, giving the blooms a frilly look.

And here's my favorite: "Picotee." It gives you full-size daisy blooms in white with the end of each petal looking as though it's been dipped into a rich red paint--and all that jazz is on plants never over 4 feet. This one, like all the others, creates spectacular color in the garden, and even more in a vase.

More Information
Associated SKUsAM015848
AM013128 (1 Pound)
AM013129 (10 Pounds)
AM013130 (5 Pounds)
AM013131 (1/4 Pound)
Common Name
Cosmos
Botanical Name
Cosmos bipinnatus
Seed Life Cycle
Annual
Light Requirements
Full Sun, Half Sun / Half Shade
Flower Color
Pink, Red, White, Mixed
Bloom Time
Mid summer to frost
Mature Height
12-72" tall (1-6' tall)
Wildflower Mix or Specie
Species
Ships As
Seed
Ideal Region
Northeast, Southeast, Midwest, West, Southwest, Pacific Northwest
Zones
2, 3, 4, 5, 6, 7, 8, 9, 10
Non-GMO
Yes
Neonicotinoid Free
Native To
Mexico, North America
Seeds Per Pound
72,000
Coverage
1/4 lb covers 990 square feet
1 lb covers 3,960 square feet
11 lb covers 1 acre
Soil Type
Average Soil, Loamy Soil, Sandy Soil, Clay Soil, Well-Drained Soil
Soil Moisture
Dry, Average, Moist / Wet
Advantages
Bee Friendly, Attract Butterflies, Native, Great For Mass Plantings, Extended Bloom Time (more than 4 weeks), Multiplies / Naturalizes, Easy To Grow, Low Maintenance, Good For Cut Flowers, Good For Containers
Additional Information
Height may vary depending on conditions of the season.
Ships to Hawaii, Alaska & Canada
Yes
Planting & Care
Shipping
Most orders ship within 2 business days.

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