Photo by Melody

PlantFiles: Common Cosmos, Mexican Aster
Cosmos sulphureus 'Cosmic Orange'

Family: Asteraceae (ass-ter-AY-see-ee) (Info)
Genus: Cosmos (KOS-mus) (Info)
Species: sulphureus (sul-FER-ee-us) (Info)
Cultivar: Cosmic Orange

3 vendors have this plant for sale.

12 members have or want this plant for trade.


12-18 in. (30-45 cm)

9-12 in. (22-30 cm)

Not Applicable

Sun Exposure:
Full Sun

Parts of plant are poisonous if ingested

Bloom Color:

Bloom Time:
Blooms all year


Other details:
This plant is attractive to bees, butterflies and/or birds
Drought-tolerant; suitable for xeriscaping
Self-sows freely; deadhead if you do not want volunteer seedlings next season

Soil pH requirements:
7.6 to 7.8 (mildly alkaline)
7.9 to 8.5 (alkaline)

Patent Information:
Unknown - Tell us

Propagation Methods:
From seed; direct sow outdoors in fall
From seed; winter sow in vented containers, coldframe or unheated greenhouse
Direct sow as soon as the ground can be worked
From seed; sow indoors before last frost
From seed; direct sow after last frost

Seed Collecting:
Allow seedheads to dry on plants; remove and collect seeds

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By ineedacupoftea
Thumbnail #1 of Cosmos sulphureus by ineedacupoftea

By ampy
Thumbnail #2 of Cosmos sulphureus by ampy

By Thomas521
Thumbnail #3 of Cosmos sulphureus by Thomas521

By ineedacupoftea
Thumbnail #4 of Cosmos sulphureus by ineedacupoftea

By htop
Thumbnail #5 of Cosmos sulphureus by htop

By htop
Thumbnail #6 of Cosmos sulphureus by htop

By DebinSC
Thumbnail #7 of Cosmos sulphureus by DebinSC

There are a total of 10 photos.
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1 positive
No neutrals
No negatives

Gardeners' Notes:

Positive ineedacupoftea On Aug 4, 2005, ineedacupoftea from Denver, CO wrote:

The best plant to spoil a pastel cottage garden.

It is the brightest orange in the plant world. (That I've seen) Those that see my garden never forget it, and ask about it later.. It is a compact version of C. sulphureus of extreme color. They begin blooming in early August, and the plants will continue to be 100% covered with flowers until frost if deadheaded. It is a true front-row border plant in size, but be warned, as a border it may steal the show and distract from even the most impressive plant behind it.

Here's to the reason that road-construction signs are blaze-orange,


This plant has been said to grow in the following regions:

Calistoga, California
Richmond, California
Clifton, Colorado
Dunnellon, Florida
Union, Kentucky
Roswell, New Mexico
Massillon, Ohio
Summerville, South Carolina
San Antonio, Texas

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