Xsenia Cosmos is a compact, award-winning cultivar of Cosmos bipinnatus that earned the prestigious Fleuroselect Novelty Award in 2018 for its extraordinary flame-pink flowers that shift toward sepia tones as the season progresses. Standing just 18 to 24 inches tall with refined 2.5-inch blooms featuring tightly whorled petals, this heirloom reaches full color in about 90 days from seed. It thrives in full sun with minimal water once established, making it a resilient choice for gardeners seeking both beauty and ease.
10
Full Sun
Low
2-11
24in H x 18in W
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High
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Xsenia's flame-pink petals undergo a subtle but striking color shift to sepia as flowers age throughout the growing season, creating a dynamic display that evolves in real time. The Fleuroselect recognition speaks to the exceptional refinement of its flower form compared to standard cosmos varieties. Compact growth keeps plants to just over 2 feet, perfect for borders and containers, while drought tolerance and pollinator magnetism mean less fussing and more garden life.
Xsenia Cosmos serves as a premium cut flower, with blooms that hold their beauty in the vase when harvested in early morning and placed in bleach-treated water. The refined flower form and evolving color palette make it particularly valued by gardeners seeking to attract pollinators while creating visually sophisticated garden displays. Its compact habit suits it equally well to garden borders, containers, and cutting gardens.
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Start seeds indoors 4 to 5 weeks before your last spring frost, keeping soil temperature around 60 to 75 degrees Fahrenheit. Germination typically occurs between 70 and 85 degrees and takes 6 to 15 days. Sow seeds at a depth of 1/8 to 1/4 inch and cover lightly.
Transplant seedlings outdoors after the last spring frost has passed, when soil has warmed and nighttime temperatures consistently stay above 60 degrees. Harden off seedlings by gradually exposing them to outdoor conditions over a week before planting. Space plants 10 inches apart.
Direct sow seeds in spring after the last frost date, sowing at a depth of 1/8 to 1/4 inch. Cosmos will germinate reliably within 6 to 15 days in warm soil.
For cut flowers, harvest blooms in early morning when petals are just opening and flowers are at their freshest. Use a clean knife dipped in a 10 percent household bleach solution to make cuts, then place stems immediately in a vase with a few drops of bleach added to the water to prolong vase life. Peak bloom occurs mid to late August, with the overall season running from late July into September and extending into November.
Deadhead spent flowers regularly throughout the growing season to encourage continuous blooming and maintain the plant's compact form. This compact cultivar requires minimal pruning beyond removing dead or damaged stems.
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“Xsenia emerged as a breakthrough in cosmos breeding, earning recognition from Fleuroselect in 2018, one of the ornamental plant world's most respected award programs. This heirloom cultivar represents careful selection for both the aesthetic refinement of its flower structure and the distinctive color-shifting characteristics that set it apart from earlier cosmos introductions. The cultivar's development reflects decades of cosmos breeding work aimed at producing plants that combine garden vigor with ornamental sophistication.”