Sonata
60d to harvest
Feathery, fernlike foliage frames a profusion of daisy-like blooms that open with a luminous, silk-satin glow—Sonata’s petals catch the light in a way that feels almost musical. Expect sturdy, well-branched stems and long-lasting flowers with crisp, clean color and a satisfying, airy texture that holds its shape beautifully. Grow Sonata for standout cut-flower bouquets and for a garden display that stays bright from early bloom through the season’s peak.
Crop Dates
| Milestone | Date |
|---|---|
| Start Indoors | Apr 24th |
| Last Frost | May 15th |
| Transplant / Sow Outdoors | May 15th |
| Harvest Begins | Jul 14th |
| Harvest Ends | Sep 24th |
Crop Details
| Trait | Value |
|---|---|
| Days to Maturity | 60 |
| Sun Requirements | Full Sun |
| Growth Habit | Upright |
| Support Needed | None |
| Planting Depth | Surface |
| Germination Temp (°F) | 70 |
| Min Soil Temp (°F) | 50 |
| Min Night Temp (°F) | 45 |
| Harden Off (days) | 5 |
Recommended Companions
Frequently Asked Questions
What pest or disease most commonly affects Cosmos bipinnatus, and how can I stop it?
Cosmos bipinnatus commonly suffers from powdery mildew in warm, humid weather and dense plantings. Improve airflow by spacing plants and watering at the soil line, then remove any heavily affected leaves early. If mildew starts spreading, spray with a potassium bicarbonate or horticultural oil product and repeat as the label directs until new growth stays clean.
How often should I water Cosmos bipinnatus during its main growth phase?
During active flowering (roughly the mid-season period before and after buds set), keep soil evenly moist but not soggy. Water deeply about once or twice per week depending on heat, letting the top 1–2 inches dry between waterings so roots don’t sit wet. Cosmos tolerate brief dryness once established, but consistent moisture supports sturdier stems and better bloom.