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:
• Seeds are very fine and need light to germinate
• Soak in lukewarm water for 2–4 hours to soften seed coat and encourage faster germination
When to Sow:
• Indoors: Start seeds 8–10 weeks before your last expected frost
• Outdoors: Sow after the last frost in spring or in mild climates where frost is minimal
Sowing Instructions:
• Surface sow — do not cover with soil
• Press seeds gently into moist soil or seed-starting mix
• Mist lightly to avoid displacing seeds
• Use grow lights to maintain 12–16 hours of light per day.
• Use a heat mat to maintain steady temperatures of 65–75°F (18–24°C)
• Germination occurs in 14 to 30 days
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 evenly moist during germination
• Once established, water moderately — Dusty Miller is drought-tolerant and susceptible to root rot in soggy soil
Spacing:
• Thin or transplant seedlings to 9–12 inches (23–30 cm) apart
Growing Tips:
• Prefers full sun
• Can tolerate light shade in hotter climates
• Grows best in well-draining, slightly sandy or loamy soil
• Tolerates poor soils
• pH range: 6.0–7.5
• Grown for its silvery, fern-like foliage
• Makes an excellent border plant, container filler, or contrast plant in flower beds
• Can be grown as an annual in cooler zones or a short-lived perennial in USDA Zones 8–10
• Deadhead flower stalks to maintain compact growth and enhance foliage
• Heat- and deer-tolerant once established
More guides at: bloomoutlet.com/seed-guides