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PlantFiles: Common Cosmos, Mexican Aster
Cosmos bipinnatus 'Dwarf Sensation Mix'

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

5 members have or want this plant for trade.


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

18-24 in. (45-60 cm)

Not Applicable

Sun Exposure:
Full Sun

Parts of plant are poisonous if ingested

Bloom Color:
White/Near White

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


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

Soil pH requirements:
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)
7.9 to 8.5 (alkaline)

Patent Information:
Unknown - Tell us

Propagation Methods:
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
Properly cleaned, seed can be successfully stored
N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed

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By Suze_
Thumbnail #1 of Cosmos bipinnatus by Suze_

By Joan
Thumbnail #2 of Cosmos bipinnatus by Joan

By crowellli
Thumbnail #3 of Cosmos bipinnatus by crowellli

By SusanLouise
Thumbnail #4 of Cosmos bipinnatus by SusanLouise


2 positives
No neutrals
No negatives

Gardeners' Notes:

Positive crowellli On Apr 23, 2007, crowellli from Houston, TX (Zone 9a) wrote:

These reseed themselves but aren't invasive. I've had them come back from seed for three years in a row. They bloom well and I've had no pest or disease problems with them. I love them.

Positive Suze_ On May 2, 2006, Suze_ from (Zone 7b) wrote:

Really does stay compact (2-3 ft max) and can be used in borders. I love it.


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

Thousand Oaks, California
Delmar, Delaware
Bay City, Michigan
New Baltimore, Michigan
Lincoln, Nebraska
Trenton, New Jersey
Belfield, North Dakota
Oklahoma City, Oklahoma
Baden, Pennsylvania
Fort Worth, Texas
Houston, Texas
Tremonton, Utah
De Pere, Wisconsin

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