Cosmos Seeds Purity

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The pristine white cosmos, "Purity" makes a heavenly cloud-like background in the garden. 3-5 ft. Annual.

Zones 1 - 10
Advantages
Hummingbirds & Butterflies
Hummingbirds & Butterflies
Easy to Grow
Easy to Grow
Cut Flowers
Cut Flowers
Containers
Containers
Extended Blooms
Extended Blooms
Light Requirements
Full Sun
Full Sun
Half Sun / Half Shade
Half Sun / Half Shade
Mature Plant Size 36-60 inches tall
Bloom Time Summer to fall
SKU CBPUG

Plant Information

"Purity" is a well-named newer hybrid that selects the already-popular "great white" from the old mixtures, and presents it on a plant growing only 3 to 5 ft. tall. Extra-large, long-lasting flowers make this one a wonder for cutting. Like all the others, it's a snap to grow from seed, and you'll have big bloom from midsummer right up until frost.

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.

Associated SKUs
CBPUG
CBPUQP (1/4 Pound)
CBPULB (1 Pound)
Common Name Cosmos
Botanical Name Cosmos bipinnatus
Seed Life Cycle Annuals
Light Requirements Full Sun, Half Sun / Half Shade
Flower Color White
Mature Height 36-60 inches tall
Bloom Time Summer to fall
Ships As Seed
Coverage 1/4 lb covers 990 sq ft.
1 lb covers 3,960 sq ft.
Seeds Per Pound 55,000
Days to Germination 5-14 depending on soil and weather conditions.
Days to Bloom 80-90
Soil Moisture Dry, Average, Well Draining
Soil Type Sandy Soil, Loamy Soil, Drought/Dry Soil
Native To North America
Native To American southwest and Mexico
Ideal Region Northeast, Southeast, Midwest, Southwest, West, Pacific Northwest
Zones 1, 2, 3, 4, 5, 6, 7, 8, 9, 10
Advantages Hummingbirds & Butterflies, Easy to Grow, Cut Flowers, Containers, Extended Blooms
Is It Storable? Yes - You can store your seed in any cool (not freezing) dry place that is not subject to extreme temperature variations.
Non-GMO Yes
Neonicotinoid-Free Yes - Learn More
Ships to Hawaii, Alaska & Canada Yes

Shipping

Most orders ship within 48 hours or less.

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Reviewsby PowerReviews

REVIEW SNAPSHOT®

by PowerReviews
American MeadowsCosmos Seeds Purity
 
3.9

(based on 7 reviews)

Ratings Distribution

  • 5 Stars

     

    (2)

  • 4 Stars

     

    (4)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (1)

86%

of respondents would recommend this to a friend.

Pros

  • Low maintenance (6)
  • Reliable growth (6)
  • Long bloom time (5)
  • Pest resistant (3)

Cons

No Cons

Best Uses

  • Large areas (5)
  • Cut flowers (3)
    • Reviewer Profile:
    • Avid gardener (3)

Reviewed by 7 customers

Displaying reviews 1-7

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1.0

Not a single flower...

By 

from Virginia

About Me Casual Hobbyist

Pros

    Cons

    • Did Not Grow

    Best Uses

      Comments about American Meadows Cosmos Seeds Purity:

      I purchased both the Radiance and Purity cosmos seeds. You get a really generous amount of seeds in the bags, and compared to all the other seed I ordered (Chinese forget me nots, wildflower mix - all of which are doing very well) I was most excited about these. NONE GREW.

      I tried planting them in different locations, different soil types, sunny/shady, they did not grow. The seeds hardly even sprouted; none of them thrived.

      I'm not sure if there was in issue with these seed packets, or if I was just really unlucky, but considering how well the rest of my garden is doing with American Meadow's seeds, it's very bizarre.

      Disappointing. I was hoping for a garden full of this gorgeous, supposedly easy to grow flowers and had planned the layout accordingly. Now I have several empty spots I am scrambling to fill before weeds take over.

       
      4.0

      Sowing Cosmos Purity

      By 

      from Atlanta

      About Me Professional Landscaper

      Pros

      • Low Maintenance
      • Pest Resistant
      • Reliable Growth

      Cons

        Best Uses

        • Large Areas

        Comments about American Meadows Cosmos Seeds Purity:

        This cosmos seed is being broadcast in the wild. Because wew were not able to prepare or disk the soil, my germination rate was not high.

         
        5.0

        "As I look out my kitchen window this morning...."

        By 

        from Montana

        Pros

        • Long Bloom Time
        • Low Maintenance
        • Pest Resistant
        • Reliable Growth
        • Vivid Colors

        Cons

          Best Uses

          • Containers
          • Cut Flowers
          • Large Areas
          • Raised Beds

          Comments about American Meadows Cosmos Seeds Purity:

          I've got to tell you that the Migrating Finches/Chickadees/ Juncos/ Kinglets...and on & on& on.....they just adore the seeds of this lovely flower! It is blooming as I write this in breezy, sunny, windy South Western Montana.....It also makes for wonderful bouquets with my sunflowers which I also grow for the Birds.

           
          5.0

          White clouds swaying in the wind

          By 

          from Central PA

          About Me Avid Gardener

          Verified Reviewer

          Pros

          • Long Bloom Time
          • Low Maintenance
          • Reliable Growth

          Cons

            Best Uses

            • Cut Flowers
            • Large Areas

            Comments about American Meadows Cosmos Seeds Purity:

            American Meadows sells the most reliable seeds I have ever used and these cosmos are not exception. They're beautiful. They topple a little but I don't mind, as it adds to the casual look I'm going for.

            (1 of 1 customers found this review helpful)

             
            4.0

            easy success

            By 

            from Arlington, Texas

            About Me Avid Gardener

            Verified Reviewer

            Pros

            • Long Bloom Time
            • Low Maintenance
            • Pest Resistant
            • Reliable Growth
            • Vivid Colors

            Cons

              Best Uses

              • Cut Flowers
              • Large Areas

              Comments about American Meadows Cosmos Seeds Purity:

              easy germination, almost 100%

              (1 of 1 customers found this review helpful)

               
              4.0

              Very reliable

              By 

              from Santa Monica, CA

              About Me Casual Hobbyist

              Pros

              • Long Bloom Time
              • Low Maintenance
              • Reliable Growth

              Cons

                Best Uses

                  Comments about American Meadows Cosmos Seeds Purity:

                  I have learned to sow these front and back of beds since there is such a variety of
                  heights

                  (2 of 2 customers found this review helpful)

                   
                  4.0

                  hardy and long lasting

                  By 

                  from Santa Monica, CA

                  About Me Avid Gardener, I need a 12 step program

                  Verified Reviewer

                  Pros

                  • Long Bloom Time
                  • Low Maintenance
                  • Reliable Growth

                  Cons

                  • Variable heights widths

                  Best Uses

                  • Large Areas

                  Comments about American Meadows Cosmos Seeds Purity:

                  These made lovely delicate flowers amongst the warmer colors of summer. They varied in height from 9 inches to 4 feet and have out-lived almost all other blooms. Yes, I would recommend them, and have already bought more.

                  Displaying reviews 1-7

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                  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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