Garden Cosmos profile

Written by Maggie

Jan 19 2021

Garden Cosmos profile

Garden Cosmos, scientific name Cosmos bipinnatus, is an annual herb, originally in Mexico. Garden Cosmos is pleasant to light, bear infertile soil, avoid fertilizer, the soil is too fertile, avoid hot, avoid water, to summer high temperature is not adapted, not cold. Loose, fertile and well drained loam is required.

Garden Cosmos picture

Garden Cosmos

Morphological characteristics of Garden Cosmos


Garden Cosmos are annual or perennial herbs, 1 to 2 meters tall. Roots ew fusiform, fibrous roots, or near the base of the stem with adventitious roots. Stem is glabrous or slightly pilose.


The leaves of Garden Cosmos are secondary pinnately deeply lobed, lobes linear or filamentous linear. Inflorescences are solitary, 3-6 cm in diameter; Peduncle is 6-18 cm long. Involucral bracts are outer lanceolate or linear-lanceolate, subleathery, pale green, with deep purple stripes, apically long and narrowly acute, as long as inner layer, 10 -- 15 mm long, inner layer elliptic ovate, membranous. Plate is spreading, upper end filiform, nearly as long as achene.


Garden Cosmos has tongue-like flowers of purplish red, pink or white; Tongue is elliptic obovate, 2-3 cm long, 1.2-1.8 cm wide, with 3-5 obtuse teeth; Tubular flowers are yellow, 6-8 mm long, short tube, cylindrical upper part, with lanceolate lobes; Style is with shortly apiculate appendage.

Garden Cosmos blooms from June to August.


Achenes of Garden Cosmos are dark purple, 8-12 mm long, glabrous, with a long beak at the upper end and 2-3 sharp spines.

Fruit season of Garden Cosmos is September - October.

Garden Cosmos

The ecological habits of Garden Cosmos

Garden Cosmos is native to Mexico.Annual herb flowers; Garden Cosmos likes warm and sunny environment cold, afraid of half shade and high temperature. Garden Cosmos has a long period of time, large pink flowers, sparsely natural and unrestrained, soft and lovely flowers, tantalizing charm, a sea of flowers in full bloom, quite poetic. Against the wind to the right and left, dance more light than a ballerina, people can not help but love.

Garden Cosmos likes warm and sunny environments and is cold resistant, but is afraid of half shade and high temperature. The optimum temperature for germination is 18-25, the limit temperature for germination is 10-30, and the optimum temperature for growth is 10-25. The germination period is 5-8 days, and the flowering period is 2-3 months.

Main value of Garden Cosmos

Garden Cosmos is tall in shape, elegant in leaf shape, and colorful in color, such as pink, white and dark red. It is suitable for setting up flower mirrors. It is planted in patches on the edge of grass, around trees and along the road to beautify and afforestation, which is quite wild. Double varieties can be used as cut flower material.Suitable for flower background material, can also be planted in the hedges, rocks, cliff slopes, tree altar or house side.

Medicinal use: Garden Cosmos whole grass can be used as medicine. Function: Acute and chronic dysentery. It has the effect of clearing away heat and detoxification.

Garden Cosmos