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Cosmos sulphureus

Cosmos sulphureus
yellow cosmos
Cosmos sulphureus seedhead
Cool spikey seedhead

Common name yellow cosmos
Family asteraceae
Life cycle annual
Flowers yellow-orange (summer)
Size 30"
Light sun
Cultural notes ordinary garden soil
From seed germinate at room temperature
detailed seed-starting info below
Seed ripensearly August

We've grown these from seed a few times over the years, but last year I didn't; for the first time, I found a volunteer plant, so that we could enjoy its golden flowers anyway. So we collected seed, and have started them again officially this year.

In our garden, this plant grows in the following area: back fence border

Seed for this plant is included on my seed trade list

One or more images of this plant are included in my stock photo catalog

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Seed-starting details for this plant

  1. Seed for 'Bright Lights', Park '01. Baggy 70F (55%G, 4-6d)
  2. Seed from '04 garden. Baggy 70F (93%G, 4-7d)
  3. Seed from '09 garden. Baggy 70F (96%G, 3-6d)
  4. Seed from '10 garden. Baggy 70F (100%G, 3-5d)
  5. Seed from '09 garden. Baggy 70F (88%G, 3-5d)
  6. Seed from '09/'10 gardens. Baggy 70F (94%G, 4-6d)

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