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 recommend: Mix seeds with moist sand or paper towel, place in a sealed bag, and refrigerate at 35–40°F (1–4°C) for 7–10 days
• Check regularly: If seedlings sprout in the fridge, remove them gently and plant immediately.
• Optional: Soak seeds in warm water for a few hours before sowing (not required but may help soften seed coat)
When to Sow:
• Indoors: Start seeds 6–8 weeks before the last frost
• Outdoors: Sow directly after the last frost in spring or fall sow for natural stratification
Sowing Instructions:
• Surface sow — do not cover; seeds need light to germinate
• Press gently into moist soil
• Use grow lights to maintain 12–16 hours of light per day.
• Ideal soil temperature: 65–70°F (18–21°C)
• 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.
• Germinates in 10–20 days
Light Requirements:
• Grows best in full sun to partial shade
• In hot climates, provide afternoon shade to prevent wilting
Soil Requirements:
• Prefers well-draining, loamy soil enriched with compost
• Tolerates average soils
• pH range: 6.0–7.5
Watering:
• Keep soil evenly moist during germination
• Once established, water moderately — drought-tolerant but prefers some moisture
Spacing:
• Thin or transplant seedlings to 12–18 inches (30–45 cm) apart
Growing Tips:
• A highly aromatic herb with lemon-scented foliage
• Used in teas, tinctures, culinary dishes, and natural remedies
• Attracts bees and pollinators
• Cut back midseason to encourage bushier growth
• Grows as a perennial in USDA Zones 4–9
• Can self-seed — deadhead if you want to control spreading
More guides at: bloomoutlet.com/seed-guides