PlantsCosmos→Chocolate Cosmos (Cosmos atrosanguineus)

Common names:
Give a thumbs up Chocolate Cosmos
Give a thumbs up Cosmos

General Plant Information (Edit)
Plant Habit: Herb/Forb
Sun Requirements: Full Sun
Full Sun to Partial Shade
Plant Height: 30 inches
Plant Spread: 18 inches
Flowers: Showy
Flower Color: Russet
Other: dark red to a maroon dark browm
Flower Time: Summer
Late summer or early fall
Underground structures: Bulb
Uses: Cut Flower
Suitable as Annual
Wildlife Attractant: Bees
Propagation: Seeds: Sow in situ
Start indoors
Other info: Seed is impossible.
Propagation: Other methods: Division
Other: Tuberous root
Containers: Suitable in 1 gallon
Suitable in 3 gallon or larger
Needs excellent drainage in pots


The 2014 All Things Plants Top 25 Summer Bulbs and TubersThe 2014 All Things Plants Top 25 Summer Bulbs and Tubers
By dave on May 17, 2014

What a fun and diverse group of plants! Come on in and check out the report of the top 25 most active summer bulbs and tuber entries in our plants database. You will be surprised at some of the plants that made the list!

(Full article6 comments)
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Photo gallery:

Posted by jmorth (central Illinois) on Oct 30, 2011 10:05 PM

If grown in colder zone than listed, may be stored frost free over winter. Chocolate pudding color with a chocolate fragrance (actually a light vanillin scent, a scent often associated with chocolates).
Plant is extinct in the wild.(Mexico). Vegetative propagation from a single tuber in 1902 has maintained availability.
Quite the conversation piece..

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Plant Events from our members
jmorth On April 20, 2014 Obtained plant
Brent and Beckys
ShawnSteve On August 27, 2021 Seeds germinated
Sourced from Chocolate Flower Farm. Seed cv. 'CFF Chocolat', in special production, by Marie. U.S. supplier of not only seeds, yet tubers & plants too, of fertile varieties. (When "in stock".)
ShawnSteve On July 5, 2021 Miscellaneous Event
Not certain about differences in color of the cotyledons with these seedlings If are any indication of ones that are weaker, due to being more closely like, that of true to species. Or if because of tending to be more like those with more of mixed ancestry.

While three are much darker green in color, & growing quite strongly, & more normally than those three, which are obviously much weaker, having the pale cotyledons. I should think the more normally appearing, & better growing ones, should grow more quickly, & flower sooner.
Hopefully, some will produce tubers, prior to entering into dormancy.

In any case, should like to get ahold of the older version, of atrosanguineus, next year. For possible future cross pollination attempts.
ShawnSteve On July 3, 2021 Seeds germinated
That was rather quick ! (I was concerned, a couple may have rotted, during time spent indoors with cold A.C.) while germinating, during heavy downpours As I'd brought them indoors, to avoid being hit by "Flash Flood", & possibilty having been completely washed away.
ShawnSteve On June 26, 2021 Seeds sown
Seed variety, of 'Black Magic'. While it is summer, I'm not waiting for cooler weather, to start these seeds.
KelliW On March 4, 2019 Seeds germinated
1 germinated
KelliW On February 23, 2019 Seeds sown
indoors, seeds from chiltern 'black magic', sown in paper towel
» Post your own event for this plant

Discussion Threads about this plant
Thread Title Last Reply Replies
flopper? by Onewish1 Jul 2, 2012 12:45 AM 6
A few Database requests, please. by ShawnSteve Jul 26, 2021 2:34 PM 9
Is this cosmos? or a weed? by Frillylily Jul 4, 2021 7:17 PM 45
Chocolate Cosmos from seeds by ShawnSteve Mar 3, 2019 7:23 AM 5
Those newer Cosmos by ShawnSteve Aug 10, 2021 3:32 PM 47
Cosmos by geminitina Apr 18, 2018 3:44 PM 8
Cosmos hybrid by bonitin Jan 20, 2016 3:17 AM 4
What kind of a Cosmos? by bonitin Jan 9, 2016 9:48 AM 8
What seeds are you ordering this year? by luvsgrtdanes Feb 22, 2015 10:07 AM 78
Cosmos: Overwintering? by LysmachiaMoon Aug 21, 2014 7:04 AM 13
Summer bulb catalogs are arriving! by gemini_sage Jan 20, 2014 7:55 PM 11

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