Photo by Melody

PlantFiles: Common Cosmos, Mexican Aster
Cosmos bipinnatus 'Sonata Carmine'

Family: Asteraceae (ass-ter-AY-see-ee) (Info)
Genus: Cosmos (KOS-mus) (Info)
Species: bipinnatus (by-pin-NAY-tus) (Info)
Cultivar: Sonata Carmine

One vendor has this plant for sale.


24-36 in. (60-90 cm)
36-48 in. (90-120 cm)

12-15 in. (30-38 cm)
15-18 in. (38-45 cm)

Not Applicable

Sun Exposure:
Full Sun

Parts of plant are poisonous if ingested

Bloom Color:
Fuchsia (Red-Purple)

Bloom Time:
Late Spring/Early Summer
Mid Summer
Late Summer/Early Fall


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:
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)

Patent Information:
Unknown - Tell us

Propagation Methods:
From seed; sow indoors before last frost
From seed; direct sow after last frost

Seed Collecting:
N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed

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By langbr
Thumbnail #1 of Cosmos bipinnatus by langbr

By chrimon
Thumbnail #2 of Cosmos bipinnatus by chrimon

By Sabathiel
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1 positive
1 neutral
No negatives

Gardeners' Notes:

Positive GuemesGardener On Mar 1, 2011, GuemesGardener from Anacortes, WA wrote:

I particularly like this cosmos for its 18"-24" size in my garden north of Seattle. It's hard to find that size cosmos.

Neutral PurplePansies On Aug 4, 2004, PurplePansies from Deal, NJ (Zone 7a) wrote:

this is a nice little plant...... grew it by accident..... like seashells or the red shades better........ or the painted one...... but this one's fine..... if you want a bright splash of magenta this will do....... it's a bright campion magenta...... nice growth habit...... easy.......


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

Kirklin, Indiana
Olathe, Kansas
Bay City, Michigan
Mantua, Ohio
Edmond, Oklahoma
North Charleston, South Carolina
Spokane, Washington

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