Sonata Mix

Family: Asteraceae Annual flowering plant

Planting Schedule

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Feathery, airy blooms open like living confetti—silky petals in a joyful mix of warm sunset pinks, rosy reds, and sunlit golds, each flower held on sturdy stems for a long, graceful display.

Sonata Mix forms a tidy, upright plant with fine, fernlike foliage that makes every blossom look even more luminous. Ideal for fresh cut arrangements and vibrant garden borders, it’s a pollinator favorite that brings constant color from early summer into fall.

Light: Full SunMaturity: 60 DaysHabit: Upright

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Sonata Mix Planting Dates by USDA Zone

Estimated US hardiness-zone windows for sow, transplant, and harvest. Enter a US ZIP above for exact local dates, or open a zone below.

Zone	Start Indoors	Sow / Transplant	Harvest
Zone 1a	Protected Environment Only
Zone 1b	Direct Sow	Jun 1st	Jul 31st – Aug 1st
Zone 2a	Direct Sow	May 25th	Jul 24th – Aug 29th
Zone 2b	Direct Sow	May 15th	Jul 14th – Aug 25th
Zone 3a	Direct Sow	May 15th	Jul 14th – Sep 1st
Zone 3b	Direct Sow	May 19th	Jul 18th – Sep 21st
Zone 4a	Direct Sow	May 15th	Jul 14th – Sep 24th
Zone 4b	Direct Sow	May 13th	Jul 12th – Sep 27th
Zone 5a	Direct Sow	May 8th	Jul 7th – Sep 30th
Zone 5b	Direct Sow	May 4th	Jul 3rd – Oct 5th
Zone 6a	Direct Sow	May 1st	Jun 30th – Oct 10th
Zone 6b	Direct Sow	Apr 25th	Jun 24th – Oct 16th
Zone 7a	Direct Sow	Apr 20th	Jun 19th – Oct 20th
Zone 7b	Direct Sow	Apr 10th	Jun 9th – Oct 28th
Zone 8a	Direct Sow	Apr 1st	May 31st – Nov 5th
Zone 8b	Direct Sow	Mar 23rd	May 22nd – Nov 12th
Zone 9a	Direct Sow	Mar 6th	May 5th – Nov 26th
Zone 9b	Direct Sow	Feb 9th	Apr 10th – Dec 9th
Zone 10a	—	Oct 1st	Nov 30th – Feb 28th
Zone 10b	—	Oct 1st	Nov 30th – Feb 28th
Zone 11a	—	Oct 1st	Nov 30th – Feb 28th
Zone 11b	—	Oct 1st	Nov 30th – Feb 28th
Zone 12a	—	Oct 1st	Nov 30th – Feb 28th
Zone 12b	—	Oct 1st	Nov 30th – Feb 28th
Zone 13a	—	Oct 1st	Nov 30th – Feb 28th
Zone 13b	—	Oct 1st	Nov 30th – Feb 28th

Crop Details

Trait	Value
Days to Maturity	60
Sun Requirements	Full Sun
Growth Habit	Upright
Support Needed	None
Planting Depth	Surface
Germination Temp (°F)	75
Min Soil Temp (°F)	60
Min Night Temp (°F)	50
Harden Off (days)	Not Required

Frequently Asked Questions

What pest or disease most commonly affects Cosmos bipinnatus, and how can I control it?

Cosmos bipinnatus is frequently troubled by aphids and by powdery mildew in humid spells. Check the undersides of leaves weekly and spray a strong jet of water or use insecticidal soap when you first see colonies; remove heavily mildewed leaves early to slow spread. Ensure full-sun airflow and avoid overhead watering so the foliage dries quickly.

How often should I water Cosmos bipinnatus during the main growing phase (after it establishes)?

Water to keep the soil evenly moist for the first week or two after germination, then shift to deep, less-frequent watering. During active growth, water about 1–2 times per week depending on heat, aiming for soil that’s slightly dry on top but not bone-dry underneath. In full sun, avoid daily shallow watering—Cosmos performs best when roots are encouraged to reach deeper moisture.

How do I know when Cosmos bipinnatus (Sonata Mix) is ready to harvest for cut flowers?

Harvest when the flower heads are fully open and brightly colored, with the center disk floret area clearly visible. Because Cosmos bipinnatus matures in about 60 days, begin cutting regularly once the first main blooms open, and continue harvesting every few days to trigger more branching and new buds. Cut in the morning and trim stems so they’re ready for a vase immediately.