General Plant Information (Edit)
Plant Habit: Herb/Forb
Life cycle: Annual
Sun Requirements: Full Sun
Full Sun to Partial Shade
Water Preferences: Mesic
Dry Mesic
Soil pH Preferences: Slightly acid (6.1 – 6.5)
Neutral (6.6 – 7.3)
Slightly alkaline (7.4 – 7.8)
Plant Height: 1 to 3 feet but may attain heights to 6 feet
Plant Spread: 1 to 3 feet
Leaves: Evergreen
Flowers: Showy
Flower Color: Orange
Red
Yellow
Other: Yellow rays with yellow disc
Bloom Size: 1"-2"
Flower Time: Summer
Late summer or early fall
Fall
Uses: Cut Flower
Wildlife Attractant: Bees
Birds
Butterflies
Resistances: Drought tolerant
Propagation: Seeds: Needs specific temperature: 75ºF
Days to germinate: 7 to 21 days
Sow in situ
Start indoors
Propagation: Other methods: Division
Containers: Suitable in 3 gallon or larger
Needs excellent drainage in pots

Image
Common names
  • Sulphur Cosmos
  • Cosmos
  • Orange Cosmos
  • Klondike Cosmos
Botanical names
  • Accepted: Cosmos sulphureus
  • Synonym: Cosmos gracilis

Photo Gallery
Location: My Garden
Date: 2022-10-22
Favorite of fall pollinators
Location: Northeastern, Texas
Date: 2023-09-17
Location: j c raulston arboretum, raleigh, north carolina
Date: 2020-10-27
Location: Colima, Colima Mexico (Zone 11)
Date: 2009-08-12
Cosmos sulphureus bloom with Fiery Skipper
Location: IL
Date: 2009-08-11
Location: j c raulston arboretum, raleigh, north carolina
Date: 2020-10-06
Location: my garden
Date: 2016-06-13
Location: Garland, TX
Date: 2016-10-21
Location: my garden, Gent, Belgium
Date: 29th October 2010
Grown from seed brought from Brazil..
Location: Allentown, Pennsylvania
Date: 2015-06-25
Location: My garden
Date: 2017-03-31
Location: My garden in SoCal.
Date: 2019-01-30
Location: Paraty, Brazil
Date: 2010-01-22
Along the road side
Location: Paraty, Brazil
Date: 2010-01-21
Along the road side
Location: Test garden 
Date: 2016-11-11
Location: Garland, TX
Date: 2018-06-02
Location: My garden in the Northeast.
Date: 2005-07-28
Uploaded by blue23rose
Location: Matthaei Botanical Gardens, Ann Arbor, MI
Date: 2010-08-30
Location: Maryland
Location: Pittsburgh, Pennsylvania
Date: 2021-11-03
Location: Paraty, Brazil
Date: 2010-01-21
Along the road side
Location: Allentown, Pennsylvania
Date: 2015-08-08
Location: Matthaei Botanical Gardens, Ann Arbor, MI
Date: 2010-08-30

Photo courtesy of Annie's Annuals and Perennials
  • Uploaded by Joy
Location: Cambridge University Botanic Garden
Date: July
credit: Magnus Manske
Location: West Valley City, UT
Date: 2011-10-03
Location: Cascade of Time Garden, Banff, Canada | August, 2022
Date: 2022-08-01
Location: Cascade of Time Garden, Banff, Canada | August, 2022
Date: 2022-08-01
Location: my garden, Gent, Belgium
Date: 10th September 2010
Location: my garden, Gent, Belgium
Date: 30st October 2010

Date: October
credit: Prenn
Location: Elberfeld, Indiana
Date: 4-23-20
Location: Matthaei Botanical Gardens, Ann Arbor, MI
Date: 2010-08-30
Location: Matthaei Botanical Gardens, Ann Arbor, MI
Date: 2010-08-30
Location: Pittsburgh, Pennsylvania
Date: 2021-11-03

Courtesy Outsidepride
  • Uploaded by vic
Location: my garden, Gent, Belgium
Date: 10th October 2010
Location: Fountain, Florida
Date: 2015-05-21

Photo courtesy of Annie's Annuals and Perennials
  • Uploaded by Joy

photo credit: Jeevan Jose, Kerala, India
Location: Cambridge University Botanic Garden
Date: July
credit: Magnus Manske
Location: West Valley City, UT
Date: 2011-10-03
Plant Events from our members
piksihk On November 7, 2020 Harvested
Collected seeds; some are over 6 ft but them some are 3-4 ft
piksihk On April 17, 2020 Bloomed
piksihk On February 20, 2020 Bloomed
one very short plant blooming WG front bed
piksihk On January 10, 2020 Bloomed
these are still blooming; 4-5 ft tall; front bed
2/14/20 pulled up remaining plants -
piksihk On March 26, 2017 Bloomed
piksihk On February 10, 2017 Obtained plant
Seedlings from test garden
lovesblooms On January 15, 2017 Seeds sown
w/s
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