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.
Seed Treatment
• Soak seeds in room-temperature water for 6–12 hours.
• Cold stratification:
– Mix seeds with moist sand or moist paper towel
– Place in a sealed plastic bag and refrigerate for 2–4 weeks at 1–4 °C (33–39 °F)
– If seedlings sprout during stratification, remove them from the bag and plant immediately
• The paper towel method works well during cold stratification—just keep it moist, not soggy.
Best Time to Sow
• Indoors: Start seeds 6–8 weeks before the last frost
• Outdoors: Direct sow in spring after the last frost or in early autumn for natural stratification
Optimum Temperature for Germination: 18–21 °C (64–70 °F)
Germination Time: 14-35 days AFTER stratification
Sowing Instructions
• Surface sow: press seeds gently into moist seed-starting mix — do not cover
• Use grow lights to maintain 12–16 hours of light per day.
• Maintain consistent moisture during germination; do not let soil dry out
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
• Thin or transplant seedlings when they develop 2–3 true leaves
• Harden off indoor seedlings before transplanting outdoors
• Space 20–25 cm (8–10 in) apart in well-drained, sandy soil
Growing Tips
• Drought-tolerant and salt-tolerant once established — perfect for coastal or rock gardens
• Grow in full sun for compact, healthy plants
• Avoid overwatering — roots dislike soggy soil
• Remove spent flower heads to encourage continuous blooming
• Low-maintenance perennial that forms tidy mounds with pink or lavender flowers
Note: Armeria maritima is slow to establish but long-lived and excellent for borders, edges, or gravel gardens. Patience during germination pays off with stunning blooms!
More guides at: bloomoutlet.com/seed-guides