- Lemon balm seeds do not need to be soaked before planting.
- Lemon balm seeds require light for germination, so do not cover them with soil. Instead, press them lightly into the soil surface or plant the seeds at a depth of 1/8 inch (3 mm).
- Lemon balm seeds germinate best at temperatures between 60-70°F (15-21°C).
- Lemon balm seeds typically germinate within 7-14 days.
- Lemon balm can be started either indoors or outdoors, depending on your preference.
- For outdoor planting, start lemon balm seeds in the spring after the last frost date in your area.
- Lemon balm is hardy in USDA zones 4-9.
- Lemon balm is frost hardy and can survive light frosts.
- Lemon balm is a perennial herb.
- Space lemon balm seeds at least 12-18 inches (30-45 cm) apart.
- Thin seedlings to one plant every 12-18 inches (30-45 cm) when they have developed their first true leaves.
- Space lemon balm plants at least 18-24 inches (45-60 cm) apart.
- Lemon balm requires at least 6 hours of direct sunlight per day to grow properly.
- Mature lemon balm plants can grow up to 2-3 feet (60-90 cm) tall.
- Transplant lemon balm seedlings outdoors after the last expected frost date in your area.
- Lemon balm produces small, white or yellow flowers that bloom in the summer. The flowers are not particularly showy, but are attractive to bees and other pollinators.
