When should I plant lemon balm seeds?
Plant lemon balm seeds in spring after the last frost or start them indoors 6-8 weeks earlier for a head start.
Everything you need to know about Lemon Balm seeds
Herb Seed Growing FAQ
Growing Lemon Balm Seeds: Questions & Answers
Learn how to grow lemon balm from seed including germination, watering, harvesting, container growing, propagation and overwintering tips.
Quick Lemon Balm Growing Guide
Sunlight
Full sun to partial shade
Full sun to partial shade
Germination
10–21 days
10–21 days
Plant Type
Perennial herb
Perennial herb
Best For
Tea gardens, pollinators and containers
Tea gardens, pollinators and containers
Lemon Balm Seeds Growing Questions
How do I prepare the soil for planting lemon balm seeds?
Use fertile, well-drained soil enriched with compost or organic matter. Lemon balm prefers soil with a pH between 6.0 and 7.0.
How deep should I plant lemon balm seeds?
Sow seeds on the soil surface or lightly cover them with around 0.5 cm of soil, as they benefit from light for germination.
How long does it take for lemon balm seeds to germinate?
Lemon balm seeds generally germinate within 10-14 days, although cooler conditions may extend this to around 21 days.
Can I grow lemon balm indoors?
Yes. Lemon balm grows well indoors in a bright location with at least 6-8 hours of sunlight or under grow lights.
How often should I water lemon balm seeds?
Keep the soil consistently moist during germination. Mature plants prefer evenly moist soil but should not be overwatered.
How do I thin lemon balm seedlings?
Once seedlings develop their first true leaves, thin them to around 20-30 cm apart to improve airflow and healthy growth.
Can lemon balm be grown in containers?
Absolutely. Use a container at least 20-30 cm wide with good drainage and quality potting mix.
How do I transplant lemon balm seedlings into the garden?
Transplant seedlings once they are 7-10 cm tall and have developed strong roots. Space plants 20-30 cm apart.
How can I prevent lemon balm from becoming invasive?
Harvest regularly, remove flower heads before seeds form and grow lemon balm in containers or raised beds if needed.
How do I harvest lemon balm leaves?
Harvest stems once plants are established, ideally in the morning. Cut stems just above a leaf node to encourage regrowth.
How can I dry lemon balm for storage?
Bundle stems and hang them upside down in a warm, dry and well-ventilated area away from direct sunlight until fully dry.
What pests and diseases should I watch out for when growing lemon balm?
Watch for aphids, spider mites, whiteflies and fungal diseases like powdery mildew, especially in humid conditions.
How do I overwinter lemon balm plants?
In colder climates, cut plants back after frost and apply mulch around the roots for winter protection.
Can I propagate lemon balm from cuttings?
Yes. Take 10-15 cm cuttings from healthy stems and root them in moist potting mix in a warm, bright location.
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