Cupcakes Cosmos is a charming cultivar of Cosmos bipinnatus that brings whimsical, cupcake-shaped blooms to gardens from summer through fall. Growing 36 to 48 inches tall with a compact 24-inch spread, this flower thrives in full sun across hardiness zones 2 to 11, making it adaptable to nearly any North American garden. Blooming 56 to 84 days from seed, it rewards gardeners with months of cut flowers while asking very little in return: it tolerates drought, attracts pollinators, and shrugs off major pests and diseases.
Full Sun
Low
2-11
48in H x 24in W
—
Moderate
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The cupcake-like form of these blooms makes them instantly recognizable and irresistibly charming in garden beds and bouquets alike. Cosmos bipinnatus varieties are legendary for their low-maintenance personality, thriving on neglect once established, yet flowering prolifically when given basic care. The long bloom window from June through November means you'll have fresh flowers for cutting well into fall, and their airy, feathery foliage creates a cottage-garden aesthetic that softens garden edges beautifully.
Cupcakes Cosmos are grown primarily as ornamental cut flowers and garden focal points. Their distinctive bloom shape and reliable flowering over months make them favorites for fresh arrangements, cottage gardens, and pollinator-focused landscapes. They're equally at home in informal borders or containers, providing reliable color when many other summer bloomers are fading.
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Start seeds indoors 4 to 5 weeks before your last spring frost date in sterile germinating mix. Keep containers at approximately 60 to 75 degrees Fahrenheit. Seedlings will emerge in 3 to 10 days. Transplant outdoors after hardening off once all danger of frost has passed.
Transplant seedlings outdoors after your last spring frost date once they have been hardened off by gradually exposing them to outdoor conditions. Space plants 1 inch apart. Cosmos are frost-tender and will not tolerate freezing temperatures, so timing matters.
Direct sow seeds in spring after the last frost has passed. Sow seeds at a depth of 1/8 to 1/4 inch and keep the soil consistently moist until germination occurs.
Cut cosmos flowers for bouquets when blooms are fully open but still fresh. Cut stems in the early morning or evening when stems are most hydrated. Regular cutting encourages more blooms throughout the season, so deadheading spent flowers extends flowering and keeps plants looking tidy.
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