Annual | Vibrant daisy-like blooms | Excellent cut flower
For optimal germination rates, initiate seed propagation indoors under controlled conditions—unless the species exhibits a high sensitivity to root disturbance. This approach allows precise regulation of temperature, humidity, and light, improving germination consistency and seedling viability. Do not skip any recommended seed treatments, as they are essential for uniform and successful germination.
When to Sow
Indoors: Start 6–8 weeks before last frost (January–April depending on region)
Outdoors: Sow only after frost has passed — suitable only where winter temps stay between –5°C and 0°C (23–32°F)
Germination Temperature: 21–24°C (70–75°F)
Germination Time: 7–21 days
Light Requirements: Light aids germination — do not cover seeds
Use grow lights to maintain 12–16 hours of light per day.
How to Sow Indoors
Fill trays or pots with moist, well-draining seed-starting mix. Surface-sow seeds and press lightly into soil. Mist gently to settle seeds. Do not cover.
Humidity: Use a humidity dome or clear cover to maintain consistent moisture during germination. Open the dome briefly once per day to allow fresh air in and reduce mold risk. Remove the dome entirely once seedlings emerge.
Post-Germination Care
Keep seedlings in bright light or under grow lights. Water when the top layer begins to dry. Harden off gradually before transplanting outdoors.
Growing Tips
Plant in full sun and rich, well-drained soil. Space 20–30 cm (8–12 in) apart. Avoid overhead watering to reduce the risk of mildew. Deadhead faded flowers to extend blooming.
Growing Tips
- Callistephus chinensis produces vibrant, chrysanthemum-like blooms in a wide range of colors, ideal for cut flowers, borders, and beds.
- Avoid overhead watering to prevent fungal diseases like aster wilt.
- Rotate planting locations yearly to avoid soil-borne pathogens.
- Deadhead spent flowers regularly to promote extended blooming.
This classic garden favorite adds cheerful, late-season color and thrives with just a little attention!