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Cosmos parviflorus |
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| Common name |
southwestern cosmos |
| Family |
asteraceae |
| Life cycle |
annual |
| Flowers |
white |
| Size |
24-36" |
| Light |
sun |
| Cultural notes |
well-drained soil, drought-tolerant |
From seed  |
May require a few weeks cold treatment to germinate
detailed seed-starting info below
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Annual wildflower of the southwestern US. Thread-like leaves on branching stems topped with white daisy flowers.
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We're just trying this plant for the first time this year; it
hasn't found a permanent place in our gardens yet.
(click here for a full list) About my plant portraits
PlantLinks to other web pages about Cosmos parviflorus
- Seed from NARGS '24/'25 exchange. Baggy 70F (no G, 6w)
- Same seed as above. Baggy 35F (4w) - 70F (70%G, 2-5d)
The cold treatment in 2026 appears to have spurred germination
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Last modified:
March 08, 2026
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