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.
⚠️ Keep soil evenly moist during germination. DO NOT LET IT DRY OUT—once seeds begin absorbing water (imbibition), drying can kill the seed embryo, and even brief dryness after sprouting can kill seedlings.
When to Sow Indoors
Start seeds indoors in late winter to early spring, about 6–8 weeks (42–56 days) before your last expected frost.
Optimum Germination Temperature: 18–22 °C (65–72 °F)
Germination Time: up to 28 days
Light Requirements for Germination: Seeds require light to germinate. Use grow lights to maintain 12–16 hours of light per day.
How to Sow Indoors
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Use a fine, well-draining seed-starting mix
• Surface-sow seeds—do not cover with soil
• Gently press seeds into the surface for good contact
• Water carefully from below or mist lightly to avoid displacing seeds
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
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Remove humidity cover immediately after sprouting
• Keep seedlings in bright light to prevent stretching
• Water sparingly—allow the surface to dry slightly between watering
Final Plant Spacing: 15–25 cm (6–10 in)
Plant Type: Annual or short-lived perennial (self-seeding)
Mature Height: 10–20 cm (4–8 in)
Growth Habit: Low-growing, spreading succulent with delicate pink star-shaped flowers
Growing Tips
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Prefers full sun to light shade
• Thrives in sandy or rocky, well-drained soil
• Excellent for rock gardens, containers, and dry borders
• Drought-tolerant once established
• Avoid overwatering—excess moisture can cause rot
More guides at: bloomoutlet.com/seed-guides