Seed Treatment
- Soak seeds in warm water for 4–6 hours before planting.
This helps soften the seed coat and promotes faster sprouting.
When to Sow
- Indoors: Start seeds 8–10 weeks before the last expected frost.
- Outdoors: Sow in late spring, after frost risk has passed.
Soil Requirements
- Prefers well-draining, neutral to slightly alkaline soil.
- Ideal pH: 6.5–7.5.
- Add sand or perlite to improve drainage if needed.
Light Requirements
- Requires full sun (at least 6 hours daily) for best flowering and compact growth.
Sowing Depth
- Sow seeds ⅛ inch (3 mm) deep and lightly cover with soil.
- Press gently to ensure good seed-to-soil contact.
Watering
- Keep soil lightly moist during germination.
- Once seedlings are established, water moderately—do not overwater, as Dianthus is prone to root rot in soggy soil.
Germination Time
- Seeds germinate in 7–14 days at 65–70°F (18–21°C).
Spacing
- Thin or transplant seedlings to 10–12 inches (25–30 cm) apart for good airflow and full growth.
Growing Tips
- Dianthus caryophyllus produces fragrant, frilled blooms in a wide range of colors—perfect for cut flowers, borders, and containers.
- Deadhead regularly to encourage continuous blooming.
- Flowers may bloom in the first year if started early indoors, but they’re more commonly grown as biennials or short-lived perennials.
- Provide mulch or winter protection in colder zones.
- Avoid high humidity; excellent air circulation helps prevent mildew.