Sea Shells
Feathery, seashell-like petals unfurl in a soft, airy bloom that seems to glow in the sun—Sea Shells Cosmos is a delight for the senses from first bud to full show. Expect a light, crisp texture with ruffled, shell-formed florets and a graceful, upright habit that makes every stem feel like a fresh bouquet-ready treasure. Grow for long-lasting cut stems and pollinator-friendly color that draws butterflies and beneficial insects all season long.
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) | Not Required |
Recommended Companions
Frequently Asked Questions
What pest or disease most commonly affects Cosmos bipinnatus (“Sea Shells”), and how do I treat it at home?
How often should I water Cosmos bipinnatus during peak growth (around weeks 3–8)?
Feathery, seashell-like petals unfurl in a soft, airy bloom that seems to glow in the sun—Sea Shells Cosmos is a delight for the senses from first bud to full show. Expect a light, crisp texture with ruffled, shell-formed florets and a graceful, upright habit that makes every stem feel like a fresh bouquet-ready treasure. Grow for long-lasting cut stems and pollinator-friendly color that draws butterflies and beneficial insects all season long.
Sowing Tips
Soil Temperature
Direct sow or transplant when soil at planting depth holds 60°F for reliable germination and early growth.
Expert Note
Sow cosmos after frost danger passes and keep the plants in full sun for the most abundant, long-lasting blooms.