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 lukewarm water for 12 hours
• Then, Cold Stratify by placing seeds in a damp paper towel inside a sealed plastic bag and refrigerating (not freezing) for 6 weeks (42 days)
• Check weekly: If seeds sprout in the fridge, plant immediately
• After stratification, let seeds come to room temperature before sowing
• Optional: Experienced growers may try a GA3 treatment (100–250 ppm soak for 12–24 hrs) to improve germination. Use caution—incorrect use can damage seeds
Best Time to Sow
• Indoors: Start 10–12 weeks before last frost
• Outdoors: Sow in spring or fall (cool weather preferred)
Germination Temperature
• Optimal: Use a heat mat to maintain steady temperatures of 65–75°F (18–24°C)
• Avoid high heat—lavender prefers cooler germination temps
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.
Germination Time
• 14–60 days after stratification
• Lavender is a slow, sometimes erratic germinator
Light Requirement
• Use grow lights to maintain 12–16 hours of light per day.
Post Germination Care
• Transplant when seedlings have 2–3 sets of true leaves
• Grow in full sun, well-drained soil (neutral to slightly alkaline)
• Water sparingly once established—lavender dislikes soggy roots
Growing Tips
• Sow thinly—lavender dislikes crowding
• Provide good air circulation to prevent damping off
• Pinch back tips after transplanting to encourage bushy growth
• Full sun is essential for healthy, aromatic plants
• First-year blooms may be limited—lavender thrives in its second year
Quick Facts
• Perennial (zones 5–9)
• Height: 30–60 cm (12–24")
• Uses: Borders, rock gardens, pollinator gardens, dried arrangements, aromatherapy