University of Wisconsin-Madison | Botany Plant Growth Facilities

Botanical Garden

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Genus: Cosmos Species: sulphureus Common Name: Yellow Cosmos Family: Asteraceae Order: Asterales Native: Mexico Habit: Annual Height: 3 to 4 feet Width: 2 to 3 feet Flowering Season: Summer Flower Color: Purple, pink, orange,red, white or Yellow Propagation: Seed Note: Yellow Cosmos is suitable for cut flower and wildflower gardens or garden backgrounds. Protect this plant from strong winds. Vegetative growth with less flowering is stimulated when grown in highly rich soil. Monitor plant for aphids and Japanese beetles. Prefers sunny to partly shady, moderately dry, well-drained, sandy, non-overly rich soil.