Lavandula angustifolia (English Lavender)

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: 65–75°F (18–24°C)
• Avoid high heat—lavender prefers cooler germination temps

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