Lavandula angustifolia (English Lavender)

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

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