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 (Before Planting)
Soak seeds in room temperature water for 12–24 hours before sowing to help improve germination.
(Do not soak pelleted seeds)
When to Sow Indoors
Start indoors 8–10 weeks (56–70 days) before your last expected frost.
Optimum Germination Temperature
Use a heat mat to maintain a steady temperature of 21–24°C (70–75°F)
Germination Time
7–21 days
Light Requirements for Germination
Seeds need light to germinate. Do not cover with soil.
Use grow lights to maintain 12–16 hours of light per day.
How to Sow Indoors
– Sow on the surface of moist, sterile seed-starting mix
– Press gently to ensure good seed-to-soil contact
– Do not cover with soil
– Keep soil consistently moist but not waterlogged
– Pelleted seeds: Mist gently to help dissolve the coating
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.