Photo by Melody

PlantFiles: Common Cosmos, Mexican Aster
Cosmos bipinnatus 'Daydream'

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

2 vendors have this plant for sale.

6 members have or want this plant for trade.


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:
Magenta (Pink-Purple)

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
Flowers are good for cutting

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; direct sow after last frost

Seed Collecting:
Allow seedheads to dry on plants; remove and collect seeds
Properly cleaned, seed can be successfully stored

Click thumbnail
to view:

By ownedbycats
Thumbnail #1 of Cosmos bipinnatus by ownedbycats

By rebecca101
Thumbnail #2 of Cosmos bipinnatus by rebecca101


2 positives
2 neutrals
No negatives

Gardeners' Notes:

Neutral the1pony On Aug 12, 2009, the1pony from (Pony) Lakewood, WA (Zone 8a) wrote:

The flowers are a little bland looking, I think. And all of mine sprawled badly, whereas the taller "Dazzlers" around them didn't. I don't think I'll do these again.

Positive rebecca101 On Oct 4, 2006, rebecca101 from Madison, WI (Zone 5a) wrote:

The flowers are smaller than other cosmos I've seen (only about 2 inches?), but the plants were very floriferous so overall the effect was very pretty. The flower coloring is just gorgeous. My only problem was that they were very tall and top-heavy, and in a bad windstorm they got knocked over. Many of the stems split at the bottom and died. Some survived but remained sprawled on the ground. Other, shorter cosmos growing in the same area were not affected. So these probably need some support.

Positive flowercrazy39 On Sep 3, 2005, flowercrazy39 from Manchester, NH wrote:

Every year I grow a different cosmos. This one I grew with Dwarf Sunny Red and they look beautiful together.

Neutral bethbriggs On Apr 1, 2005, bethbriggs from Asheville, NC wrote:

Pretty flower, but not nearly as prolific as the Sensations...I was pretty disappointed overall. This year I'm trying Picotee.


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

Manchester, New Hampshire
Kalama, Washington
Lakewood, Washington
Madison, Wisconsin

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