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Cosmos sulphureus (Asteraceae)
A hardy, erect annual requiring very little moisture once established. A native of Mexico, it can easily adapt to all regions of the United States. The glowing, orange-yellow flowers are extremely attractive, constantly blooming for weeks. Leaves are deeply dissected, almost thread-like in appearance. Rich, fertile soils tend to produce unusually tall, lanky plants. Requires full sun. Sow in early spring, seedlings are not winter hardy. Highly recommended.
Average planting success with this species: 80%
Height: 2-3 feet
Germination: 7-21 days
Optimum soil temperature for germination: 70F-80F
Sowing depth: 1/16"
Blooming period: May-November
Average seeds per pound: 63,000
Seeding rate: 15 lbs. per acre
1 oz Covers: 182 sq. ft.
Suggested use: Flower beds, roadsides, disturbed areas, mixtures.
Miscellaneous: Blooms quickly. Will need to be replanted each spring for continued success.