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 stratification is recommended
• Mix seeds with moist sand or vermiculite and refrigerate at 35–40°F (1–4°C) for 4–6 weeks
• Seeds are very small, so handle with care and avoid covering them deeply
• Check regularly: If seedlings sprout in the fridge, remove them gently and plant immediately.
When to Sow:
• Indoors: Start seeds 6–8 weeks before last frost
• Outdoors: Sow in early spring or fall for natural stratification
Sowing Instructions:
• Surface sow — do not cover, as seeds require light to germinate
• Use grow lights to maintain 12–16 hours of light per day.
• Mist lightly to settle seeds into place
• Maintain a temperature of 60–70°F (15–21°C) for best results
• Germination typically occurs in 14–28 days AFTER stratification
Watering:
• Keep soil consistently moist but not waterlogged
• Avoid letting soil dry out completely
• 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.
Spacing:
• Space plants 12–15 inches (30–38 cm) apart to allow spreading
Growing Tips:
• Prefers partial to full shade
• Protect from intense direct sun, especially in warmer zones
• Moist, well-draining soil rich in organic matter
• Thrives in humus-rich woodland soil
• pH range: 5.5–7.0
• Named for its unique habit of forming new plantlets at leaf nodes (“piggybacking”)
• Excellent for woodland gardens, shaded borders, or as a ground cover
• Can be grown indoors as a houseplant in bright, indirect light
• Hardy in USDA Zones 6–9
• Once established, spreads gently by runners and self-propagation
More guides at: bloomoutlet.com/seed-guides