Cosmos
Feathery, cloudlike blooms open in a vivid wash of color—silky petals with a crisp, satiny sheen that catches the light from every angle. Cosmos ‘Cosmos’ forms airy, upright stems topped with long-lasting flowers, offering a delicate crunch of texture in the garden and a graceful presence in arrangements. Grow it for abundant cut-flower color and effortless massing in beds and borders, where its airy foliage makes every planting feel light and luminous.
Crop Dates
| Milestone | Date |
|---|---|
| Start Indoors | — |
| Climate | Frost-Free Climate |
| Transplant / Sow Outdoors | Oct 1st |
| Harvest Begins | Nov 30th |
| Harvest Ends | Feb 28th |
Crop Details
| Trait | Value |
|---|---|
| Days to Maturity | 60 |
| Sun Requirements | Full Sun |
| Growth Habit | Upright |
| Support Needed | None |
| Planting Depth | Normal |
| Germination Temp (°F) | 75 |
| Min Soil Temp (°F) | 60 |
| Min Night Temp (°F) | 50 |
| Harden Off (days) | 7 |
Recommended Companions
Frequently Asked Questions
What pest or disease commonly affects Cosmos bipinnatus, and how can I control it at home?
How often should I water Cosmos bipinnatus during the main growing phase (after seedlings establish)?
Feathery, cloudlike blooms open in a vivid wash of color—silky petals with a crisp, satiny sheen that catches the light from every angle. Cosmos ‘Cosmos’ forms airy, upright stems topped with long-lasting flowers, offering a delicate crunch of texture in the garden and a graceful presence in arrangements. Grow it for abundant cut-flower color and effortless massing in beds and borders, where its airy foliage makes every planting feel light and luminous.
Sowing Tips
Soil Temperature
Direct sow or transplant when soil at planting depth holds 60°F for reliable germination and early growth.
Expert Note
For earlier blooms, start cosmos indoors in plug trays, then transplant only once nights are consistently mild (and expect it to be happier with direct sow in warm areas).