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Cosmos bipinnatus

Common Cosmos, Garden Cosmos

In Stock: 3.321 lb (Total:3.321lb)
  • Cosmos bipinnatus

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Seed lots

3.3 lb

Details

Germination:
98%
Germination test:
cut
Purity:
99%
Seeds per lb:
77,000
Quantity:
3.32 lb
Collected in:
Oregon
Crop year:
2021
Inventory ID:
2408

Growing Info

Scarification
Scarification: Soak in water, let stand in water for 6 hours
Stratification
Stratification: none required
Germination
Germination: can be sown outdoors in spring after last killing frost or summer, surface sow or not more than 1/8" inch deep and keep moist

Other: Germinates quickly, blooms profusely, transplants well. 

Cosmos bipinnatus, also known as the garden cosmos or Mexican aster, is a beautiful flowering plant native to Mexico. It is widely grown as an ornamental plant in temperate climate gardens, thanks to its vibrant and attractive flowers. The flowers of Cosmos bipinnatus have the ability to attract birds and butterflies, including the majestic Monarch butterfly. This plant is often included in butterfly gardens and pollinator habitats for honey bees.

Germinating within 7 to 10 days at an optimal temperature of 75 degrees Fahrenheit (24 °C), Cosmos bipinnatus begins to flower between 60 and 90 days after germination. With a rapid growth rate, this plant produces blooms from early summer until frost. The colors of its flowers range from shades of pink, white, gold yellow, orange, red, to crimson.

One of the notable features of Cosmos bipinnatus is its delicate and feathery foliage. It flourishes in dry and infertile soils, making it an easy plant to grow. While it thrives in a sunny and well-sheltered position, it can also tolerate partial shade.

Cosmos bipinnatus is considered a half-hardy annual, and its varieties and cultivars can self-sow, allowing the plant to reappear for several years. Some popular varieties of Cosmos bipinnatus include Sensation, Versailles, Sonata, and Daydream, each offering different heights and color variations.

When cultivating Cosmos bipinnatus, it is important to note that the plant prefers a soil pH between 6.0 and 8.5, reflecting its native alkaline habitat in Central America. Flowering is best in full sun, but it can tolerate partial shade. However, excessive rain can cause problems due to the fragile nature of its stems. Additionally, Cosmos bipinnatus does not handle droughts, strong winds, or cold temperatures well. Planting snails, slugs, and aphids may be attracted to Cosmos bipinnatus.

In conclusion, Cosmos bipinnatus is a versatile and attractive plant that can add beauty to any garden. Its ability to attract birds and butterflies, along with its vibrant colors and delicate foliage, make it a popular choice among gardeners. Whether you are starting a butterfly garden or simply want to bring more color to your landscape, Cosmos bipinnatus is a great option.

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(315) 497-1058
269 NY-34 Locke NY 13092
seed@sheffields.com

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