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:
Soak seeds in room-temperature water for 6–12 hours before sowing.
When to Sow Indoors:
Start seeds 6–8 weeks before the last expected frost
When to Sow Outdoors:
Direct sow after the last frost when soil temperatures are consistently warm (above 18°C / 64°F)
Optimum Germination Temperature: Use a heat mat to maintain steady temperatures of 20–25°C (68–77°F)
Germination Time: Up to 21 days
How to Sow Indoors:
Use a fine, well-draining seed-starting mix
Moisten soil before planting
Surface sow seeds and gently press them into the soil (do not bury). Seeds require light to germinate — do not cover with soil
Mist lightly to settle seeds without displacing them
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:
Provide bright light immediately after sprouting to prevent legginess
Water consistently, keeping soil lightly moist but not soggy
Harden off seedlings over 7–10 days before transplanting outdoors
Final Plant Spacing: 20–30 cm (8–12 inches)
Plant Type: Tender annual (perennial in tropical climates)
Mature Height: 30–60 cm (12–24 inches)
Growing Tips:
Prefers full sun and warm conditions
Pinch growing tips regularly to encourage bushier plants
Avoid overwatering—ensure good drainage
Harvest leaves regularly to promote continued growth
Sensitive to cold—protect from temperatures below 10°C (50°F)
More guides at: bloomoutlet.com/seed-guides