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Thursday 24 October 2019

FFF412 - YELLOW COSMOS

Cosmos sulphureus is also known as sulfur cosmos and yellow cosmos. It is native to Mexico, Central America, and northern South America, and naturalised in other parts of North and South America as well as in Europe, Asia, and Australia. It is within the Asteraceae family. 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 30–210 cm. The original and its cultivars appear in shades of yellow, orange, and red. It is especially popular in Korea and Japan, where it is often seen in mass plantings along roadsides, following an initiative pursued by the Korean-Japanese botanist Woo Jang-choon. This plant was declared invasive by the United States Southeast Exotic Pest Plant Council in 1996.

Growth characteristics of this plant include: Germination takes between 7 and 21 days at the optimal temperature of 24˚C; 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 vigour 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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2 comments:

  1. Beautiful color. Thanks for hosting.

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  2. I love cosmos. At the old farm, they had spread and would crop up blowing in the wind, as it were so I think very hardy. And yes the butterflies loved them too. Your photo is gorgeous.

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