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For successful seedlings,
see the growing notes at the bottom of the page!
Cosmos (Cosmos bipinnatus) is an extremely popular annual plant, renowned for its abundant blooms that last from July until the first frosts. This plant is a real asset to any garden, with its delicate, vibrant flowers in shades ranging from white to pink to deep purple, all with bright yellow centers. The flowers stand gracefully atop stems that can exceed one metre in height. Cosmos is not only valued for its beauty but also for its ability to attract a wide range of pollinators, including bees, butterflies, and other beneficial insects, making it an excellent companion plant for vegetable gardens and ecological landscapes. It prefers well-drained soils and thrives in full sun, though it can tolerate light partial shade.
Ecological Roles
Cosmos plays a crucial role in promoting biodiversity in the garden by attracting a variety of pollinators, such as bees, butterflies, and other beneficial insects. This plant contributes to ecosystems health by supporting pollination of neighboring plants, especially in vegetable gardens where it aids in the production of fruits and vegetables. Its long blooming season provides a continuous resource for pollinators throughout the growing season. In addition to its benefits for insects, cosmos is an excellent choice for both beginner and experienced gardeners, thanks to its ease of cultivation and ability to tolerate varying conditions, helping to create dynamic and sustainable garden spaces.
Akène cannot assume any responsibility for the use of plants for therapeutic purposes. Always seek advice from a professional before using a medicinal or edible plant.
Sowing and Growing
Technical Details
Seeds per packet: 150
Family: Asteraceae
Scientific name: Cosmos bipinnatus
Life cycle: Self-seeding annual
Hardiness zone: 5
Soil type: Silty to clayey
Soil moisture level: Dry to medium
Soil - additional attributes: Well-drained, poor
Light: Sun
Blooming: July to October
Spacing: 30 cm
Height: 100 cm
Deer resistance: High
Stratification: No
Scarification: No
Germination time: 10 to 15 days
Sowing depth: 5 mm