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'Cosmic Orange' cosmos
'Cosmic Orange' cosmos

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Zone
Zones 1-24
Full Sun
Full
Regular Water
Moderate

Cosmos sulphureus

Yellow Cosmos

Annuals, Flowers

COSMOS

Native to tropical America, mostly Mexico. Showy summer- and fall-blooming plants, open and branching in habit, with bright green divided leaves and daisylike flowers in many colors and forms (single, double, crested, and frilled). Heights vary from 2 1/2 to 8 ft.

Use for mass color in borders or background, or as filler among shrubs. Useful in arrangements if flowers are cut just after they open and placed immediately in deep, cool water. Sow seeds in open ground where plants are to grow or set out transplants from spring to summer. Plant in not-too-rich soil. Plants self-sow freely and are attractive to birds.

Cosmos sulphureus, photo courtesy of Annie's Annuals & Perennials
Cosmos sulphureus, photo courtesy of Annie's Annuals & Perennials

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Cosmos sulphureus

To 7 ft. tall, 1 1/2–2 1/2 ft. wide, with yellow-centered,yellow or orange-yellow single flowers. Tends to become weedy-looking at end of season. Two 3–4-ft.-tall,semidouble-flowering strainsare Bright Lights, with 3 1/2-in.flowers in yellow, gold, orange,and orange-red; and Klondike,with 2-in. flowers ranging fromscarlet-orange to yellow. DwarfKlondike or sunny strain is 1 1/2 ft. tall, bears 1 1/2-in. flowers. Foot-tall semidouble bloomersinclude Ladybird mix, with 2 1/2-in. scarlet, yellow, and orange flowers; and ‘Sunny Red’, with orange-red blooms. ‘Yellow Garden’ grows 3 ft. tall and wide, bears light yellow blooms with white center and edge.

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