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.
Seed Treatment
Step 1: Cold Stratification - Mix seeds with moist sand or peat moss in a sealed plastic bag. Refrigerate at 34–40°F (1–4°C) for 8–12 weeks (56–84 days).
Check weekly: If seeds begin to sprout in the fridge, remove them and plant immediately.
Step 2: Soaking: After cold stratification, soak seeds in lukewarm water for 12–24 hours to rehydrate and boost germination.
When to Sow
Indoors: Start seeds indoors in late winter to early spring.
Outdoors: Sow in fall to allow natural stratification over winter.
Germination Temperature: 64–70°F (18–21°C)
Germination Time: 21–100 days (after stratification)
Light Requirements
Lightly cover the seeds with a thin layer of vermiculite or fine seed-starting mix—just enough to keep them moist but not buried deeply.
Use grow lights to maintain 12–16 hours of light per day.
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
Once seedlings develop 2–3 true leaves, transplant carefully into individual pots. Gradually acclimate to outdoor conditions before planting out. Space plants 3–4 ft (90–120 cm) apart.
Plant type: Deciduous shrub
Mature height: 3–4 ft (90–120 cm)
Sun: Full sun to partial shade
Soil: Well-drained, moderately fertile
Water: Moderate once established
Growing Tips
Prune in late winter to maintain shape and encourage flowering. Tolerates drought once mature but benefits from mulching during hot seasons. Beautiful spring blooms followed by small edible fruits. Attracts pollinators.