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:
Cold Stratify seeds for 2–4 weeks at 1–4°C (34–39°F) using one of these methods:
• Paper Towel Method: Moisten a paper towel, place seeds inside, fold, and seal in a labeled plastic bag. Refrigerate.
• Alternative: Mix seeds with moist sand or vermiculite and refrigerate in a sealed bag.
Check weekly for mold or sprouting. If seedlings emerge, remove immediately and plant.
Best Time to Sow:
Indoors: Start 6–8 weeks before the last frost.
Outdoors: Direct sow in early spring or late fall for natural stratification.
Optimum Temperature for Germination: 15–20°C (59–68°F)
Germination Time: up to 28 days AFTER stratification
Sowing Instructions:
• Use well-draining, moderately fertile soil
• Surface sow or gently press seeds into soil—do not cover deeply, as light aids germination.
• Use grow lights to maintain 12–16 hours of light per day.
• Water gently and keep soil moist, not soggy.
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.
Watering:
Keep soil consistently moist during germination. Once established, moderately drought-tolerant.
Post-Germination Care:
• Thin seedlings to promote airflow
• Harden off indoor seedlings before transplanting
• Mulch lightly to retain moisture and prevent weeds
Growing Tips:
• Full sun to partial shade.
• Easy-care low-growing perennial ideal for rock gardens, edging, and walls
• Blooms spring to early summer with a cascade of pink flowers
• Pollinator-friendly and deer-resistant
• Trim after flowering to tidy up and encourage light rebloom
• Tolerates poor soils and grows well in temperate zones
More guides at: bloomoutlet.com/seed-guides