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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.
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Overall rating: 4.75 / 5 from 12 reviews.
Review topics: ["buy","cosmos","seeds","zinnias","plants"].
"Quality seed, exceptional blooms! Sunrise captured the beauty of the Cosmos & Zinnia's. Will buy again for next season!"
"These cosmos are beautiful and had a great germination rate. Super easy to have a border full of flowers. . . however, they are NOT dwarf sized flowers. I bought these for a border garden alongside the sidewalk in our yard, and they are now taller than I am (and I'm nearly 6 ft tall. ) We had a big rain last week, and they flopped over on the sidewalk, making it unpassable. I had to cut half of them out. If you are looking for full sized cosmos, they are beautiful. If you want dwarf for your space, beware that these are not what you are looking for."
"So beautiful and multicolored. Everyone compliments. This year I got a trio of goldfinches snacking on the seeds every day for a month!"
"I have a grass hellstrip (that strip between the road and sidewalk) that I want to convert slowly to be more bee friendly. In late summer, I sprinkled the existing grass with dwarf cosmos seeds, expecting I would see some next year. Nope, they are already popping up these little tiny pink flowers! That's wild"
"We tossed the seeds along the border of our yard and we have a glorious wildflower meadow."
"threw them on the ground and gave them a sprinkle. beauty. . . ."
"The cosmos performed beautifully this year. In fact, even after a light frost, they are still blooming profusely in my garden."
"I planted these seeds in a planter which may not be the best place. I got several blooms which I enjoyed and had the chance to make some photos. The plants were very leggy but that may have been my fault and I wish I had gotten more flowers. Still I would buy them again and hope to do better next time."
"I've always had good luck with germination rates and healthy plants when using American Meadows' cosmos seed. I decided to try the dwarf Sensation mix this year because they are short day plants and a lot of times with the 5' stalks of the wild-type cosmos they don't start blooming until it's time for frost. I'm hoping I'll be able to enjoy this variety for longer although I'm sure they won't reseed true to type. So far they are growing well. It's still early in the season."
"Nothing beats Minnesota summers! When we moved from the hot, humid, sweltering East coast, and bought this Tudor home, I immediately envisioned planting wildflowers throughout the almost 2 acre property. . . and grabbed the dwarf cosmos mix, and planted around the front and back of the house. one advantage of this mix, you can SEE the blooms from the windows of the first level of the house. (regular cosmos can get too tall and weedy) Now, my home really is landscaped with beautiful cosmos waving in the soft summer breeze while the fragrance blows in our windows all afternoon long. Whites are a "must have" and are mixed in with pinks to be able to see them. I think it truly brings our Tudor style home to life as a similar quaint village home might look in Austria. Even our black lab enjoys the wildflowers! Temps in the mid 70's-low 80's, sunny days, cool nights, no humidity, open space, and beautiful cosmos. Great combo!"