Sonata White

Cosmos

60d to harvest

Feathery, cloudlike blooms rise on slender stems in a luminous wash of pure white—cool, crisp, and quietly radiant in the garden. Sonata White opens with delicate, paper-thin petals around a softly glowing center, holding their shape beautifully for display and long-lasting bouquets. Grow it for airy movement and effortless elegance: a drought-tolerant cosmos that brings instant bloom power to borders and cutting gardens alike.

Crop Dates

Milestone	Date
Start Indoors	Direct Sow
Last Frost	Jun 1st
Transplant / Sow Outdoors	Jun 1st
Harvest Begins	Jul 31st
Harvest Ends	Aug 1st

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

Moonsong Deep Orange Marigold

Candy Cane Mix Zinnia

Rose Rhapsody Salvia

African Marigold Marigold

Profusion Cherry Zinnia

Rhapsody In Blue Salvia

Frequently Asked Questions

How often should I water Cosmos bipinnatus during its main growing phase, and what soil moisture level should I aim for?

During active growth (after seedlings establish and before flowering peaks), water deeply about 1–2 times per week so the top few inches dry slightly between waterings. Cosmos bipinnatus tolerates short dry spells, but consistent moisture prevents stressed, leggy growth—avoid soggy soil because it encourages mildew. A simple check: if the top 1–2 inches of soil are dry, water until moisture reaches the root zone.

How can I tell when Sonata White cosmos is ready to harvest (Cosmos bipinnatus)?

Harvest when flowers are fully open and the center florets look crisp and mature—this is typically around 60 days after sowing. Pick blooms early in the day, choosing stems with intact petals (no browning at the edges). For longest vase life and continued flowering, harvest regularly once plants start blooming rather than waiting for seed heads to form.