Dianthus Caryophyllus

🔍 About Dianthus Caryophyllus

• Type: Perennial (often grown as a biennial or annual in cooler climates)

• USDA Zones: 6–9 (hardy perennial), grown as annual elsewhere

• Height: 18–24 inches (45–60 cm)

• Bloom Time: Late spring to summer (sometimes into fall)

• Light: Full sun

📅 1. When to Sow

• Indoors: Start seeds 10–12 weeks before your last frost date

• Outdoors: Direct sow after last frost (less common due to slow germination)

🌱 2. Starting Seeds Indoors

• Containers: Use trays or small pots with good drainage

• Soil: Well-draining seed-starting mix

• Sowing Depth: Lightly press seeds into soil surface, then cover with a very thin layer (1/8 inch or less) of soil or vermiculite

• Water: Mist gently or bottom-water to keep moist but not wet

🌡️ 3. Germination Conditions

• Temperature: 65–70°F (18–21°C)

• Light: Bright indirect light or grow lights

• Humidity: Use a humidity dome or plastic wrap until germination

• Time: Germinates in 7–14 days

🌿 4. After Germination

• Remove plastic/humidity cover

• Provide 12–14 hours of bright light daily

• Water when soil begins to dry out

• Thin or transplant seedlings once they have 2–3 true leaves

🌷 5. Transplanting Outdoors

• When: After all danger of frost has passed and seedlings are hardened off

• Location: Full sun

• Soil: Well-drained, slightly alkaline (add lime if your soil is acidic)

• Spacing: 10–12 inches apart

🌼 6. Direct Sowing Outdoors (Optional)

• When: After frost, when soil has warmed

• Method: Sow thinly, 1/8 inch deep

• Thin: To 10–12 inches once seedlings are established

📌 Growing Tips

• Pinch tips to encourage bushier growth and more blooms.

• Deadhead to extend bloom period.

• May not flower in the first year when grown from seed, especially in cooler climates.

• Protect from overwatering and high humidity — carnations dislike soggy conditions.

• Good for cut flowers and drying.