Sulfur Cosmos
Cosmos sulphureus
-6.92205, 107.607
Field Notes
Description:
This species of Cosmos is considered a half-hardy annual, although plants may re-appear via self-sowing for several years. Its foliage is opposite and pinnately divided. The plant height varies from one to seven feet. The original and its cultivars appear in shades of yellow, orange, and red.
Habitat:
Its native habitat is Central America.
Notes:
Growth characteristics of this plant include:
Germination takes between 7 and 21 days at the optimal temperature of 75 degrees Fahrenheit; flowering begins between 50 and 60 days after germination
It prefers a soil pH between 6.0 and 8.5, reflecting its native habitat in the alkaline regions of Central America
Flowering is best in full sun, although partial shade is tolerated
The plant is tolerant to drought after germination, and is seldom subject to insect or disease damage; this vigor is attested by its status as a pest in some areas of the United States
The flowers of all Cosmos attract birds and butterflies, including the Monarch butterfly.
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