Double Dutch Rose Cosmos brings the charm of Holland to your garden with its stunning rose-like blooms in ballerina pink. This heirloom cosmos variety from the Asteraceae family grows 36-48 inches tall and produces semi- and fully-double flowers that rival garden roses for elegance. Hardy across zones 2-11, it reaches maturity in 60-90 days and flourishes in full sun with sturdy, long stems that make it irresistible for cutting. Its cottage garden charm combined with practical cutting-garden appeal earned it new-favorite status in trial gardens.
Full Sun
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2-11
48in H x ?in W
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High
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The semi- and fully-double blooms in ballerina pink are genuinely rose-like, transforming what you'd expect from a cosmos into something far more ornamental. Baker Creek's trial gardens confirmed what Dutch growers have known for years: these blooms are sturdy enough for cut flowers with stems long enough to carry into the house. At 4 feet tall, the plants provide substantial presence in the landscape without overwhelming smaller gardens, and the 60-90 day timeline means you'll see flowers blooming well into fall.
Double Dutch Rose Cosmos excels as a cut flower, prized by floral designers for its sturdy stems and dramatic blooms that hold up beautifully in arrangements. Gardeners grow it in cottage gardens and landscape borders where the tall plants provide height and continuous color from midsummer through fall frost. The flowers also attract pollinators and make natural focal points in perennial borders.
No timeline data available yet for this variety.
Start seeds indoors 6-8 weeks before your last spring frost in trays filled with moist seed-starting mix. Keep soil temperature between 65-80°F for reliable germination. Provide bright light once seedlings emerge to prevent legginess.
Harden off seedlings by gradually exposing them to outdoor conditions over 7-10 days once all danger of frost has passed. Transplant when soil has warmed to at least 60°F and plants have developed true leaves. Space transplants 10 inches apart.
Direct sow seeds outdoors after the last frost date when soil temperature reaches 60°F or warmer. Press seeds lightly into soil; they need light to germinate.
Cut flowers in early morning when blooms are fully open but still firm. Select stems with at least 2-3 leaves below the flower. Recut stems at an angle under running water immediately after cutting and place in cool water. The sturdy, long stems hold beautifully in arrangements for 7-10 days with regular water changes.
Deadhead spent flowers regularly to encourage continuous blooming and fuller plant growth. Pinching back young plants when they reach 6 inches tall promotes bushier growth and more flower production. As plants approach full height (36-48 inches), light pruning maintains shape without sacrificing bloom count.
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“Double Dutch Rose Cosmos traces its origins to Holland, where Dutch growers developed this exceptional variety by selecting for the doubled, ruffled petals that distinguish it from single-flowered cosmos relatives. The rose-like form suggests intentional breeding aimed at creating a cosmos with the ornamental drama of garden roses but with the easy-growing habit cosmos are known for. This heirloom has traveled from Dutch seedsmen to contemporary catalogs like Baker Creek, carrying with it a century-old reputation as a cutting-garden staple and cottage garden favorite.”