Cosmos Sonata™ White | Cosmos bipinnatus | Cosmos Seeds

Cosmos Sonata™ White is a compact and elegant cosmos variety producing pure white, silky blooms above delicate, feathery foliage. This dwarf cosmos is especially well suited for containers, balcony boxes, and smaller garden spaces, where it creates a soft and airy display of flowers throughout the summer.

Part of the popular Sonata™ series, this variety is known for its compact habit, uniform growth, and excellent garden performance. Plants are naturally well branched and produce abundant flowers from early summer until late in the season.

Cosmos Sonata™ White is easy to grow and perfect for both beginner and experienced gardeners. Its bright white flowers add freshness and elegance to borders, containers, and decorative plantings while attracting bees and butterflies to the garden.

Plant Details

Botanical name: Cosmos bipinnatus
Common name: Garden Cosmos
Life cycle: Annual
Hybrid status: Open pollinated
Plant height: 40–50 cm
Stem length: 30–40 cm
Plant spacing: 25–30 cm
Days to maturity: 60–75 days
Vase life: 5–7 days
Flower colour: White
Exposure: Full sun

Sowing

Sowing time: April–May
Germination time: 7–10 days
Germination temperature: 18–22°C
Light requirement: Light assists germination
Sowing depth: 5–10 mm

Cosmos seeds can be sown directly in the garden once the soil has warmed, or started indoors for earlier flowering.

Growing Information

• Recommended pot size: 13–15 cm
• Cultivation temperature: Suitable for both warm and cooler growing conditions.
• Growth stages
• Young plant stage: 4–5 weeks
• Transplant to flowering: 6–7 weeks

Blooming season: Late spring through late summer

Cosmos grows best in full sun and well-drained soil. Plants tolerate heat well and require minimal care.

Care Tips

Watering: Moderate watering; avoid overwatering.

Fertilization: Feed every two weeks. Reduce nitrogen (N) and increase potassium (K) near the bud stage to encourage stronger flowering.

Pests: Watch for aphids and thrips.

Why Grow Cosmos Sonata™ White

✔ Compact cosmos variety ideal for containers
✔ Elegant pure white flowers
✔ Easy to grow and low maintenance
✔ Long flowering season
✔ Attracts bees and butterflies