EVERGREEN

Plant Encyclopedia

Cosmos bipinnatus

Cosmos bipinnatus (garden cosmos)

Japanese name: コスモス
Scientific name: Cosmos bipinnatus

Cosmos bipinnatus

[Overview]
An annual about 2 m tall.
The stem branches freely.
The leaves are opposite and finely pinnately cut, with almost thread-like lobes.
The flowers are solitary at the stem tips.
The flowers are about 6–10 cm across and consist of ray florets around the edge and tubular florets in the center.
There are usually 8 ray florets.
There are many cultivars, with ray florets in a wide range of colors including white, yellow, orange, pink and red, and some have unusual flower forms or are dwarf.
The cultivars also fall into two groups, early-flowering and late-flowering, and the latter are sometimes called "Akizakura".

[Cultivation]
Propagate from seed and by cuttings.
Cultivation is easy, and it grows anywhere that is sunny and well drained.

[Notes]
The etymology is the Greek kosmos, meaning "beautiful".

Details

Names
English: garden cosmos, Mexican aster
Japanese: コスモス、アキザクラ(秋桜)、オオハルシャギク(大春車菊)
Life form
Annual
Habit
Terrestrial
Planting (or sowing) season
March, April, May, June, July
Flowering season
June, July, August, September, October, November
Distribution or origin
Mexico
Height
400–2000 mm
Leaf shape
Lobed leaf
Leaf arrangement
Opposite
Inflorescence
Solitary
Flower color
White, Yellowish white, Yellow, Orange, Pink, Red
Flower diameter
60–100
Leaf color
Green
Availability of seeds and plants
Low
Form sold
Seeds, Seedlings
Propagation
Seed, Cuttings
Sun exposure
Full sun
Water needs
Moderate
Soil needs
Required
Suitable uses
Potted plant, Flower bed, Cut flowers, Parks and gardens, Paddy field greening, Container, Balcony
Diseases
Powdery mildew, Seedling damping-off
Pests
Aphids, Spider mites
Japan Flower Trade Code
14068

Translated from our Japanese encyclopedia. If anything differs, the Japanese page is correct.

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