How to Grow Lemon Balm
Melissa officinalis
Lemon balm is a vigorous, hardy perennial for full sun to light shade and moist, well-drained soil. It spreads by roots and self-seeding—site with space or confine to a container. Cut back hard in midsummer to refresh tender, lemon-scented growth and prevent lankiness. Water in dry spells; mulch lightly in spring. Harvest young leaves for the best flavour, ideally before flowering. In late autumn, shear to ground level; plants regrow strongly each spring.
Yearly Lifecycle
Care Essentials
Rarely needed. Vigorous grower in most soils.
Watch For
- Powdery mildew
- Generally pest-free
Companions
Tomatoes, Squash, Fruit trees
Track your Lemon Balm care schedule — pruning, feeding, and seasonal tasks
Start planning freeCare Requirements
☀️ Light
Full sun to partial shade; best flavour in sun
Full sun to partial shade. Grows well in most positions but the best leaf flavour develops in sun. Tolerates light shade under trees or along borders.
💧 Watering
Water in dry spells for tender leaves; avoid waterlogging
Water in dry spells to keep growth lush and tender. Tolerates some drought but leaves become coarse and bitter when stressed. Avoid waterlogging.
🌱 Fertilizing
Rarely needed; light compost mulch in spring
Rarely needed — lemon balm is a vigorous grower in most soils. A light compost mulch in spring is sufficient. Avoid rich feeds which promote excessive spreading.
✂️ Pruning
Cut hard before flowering; shear to ground in autumn
Cut back hard before or during flowering to prevent self-seeding and encourage fresh, tender regrowth. Shear to ground level in late autumn. Contain spread with root barriers or pots.
🍎 Harvesting
Pick young tips regularly; harvest morning for best flavour
Pick young tender leaf tips regularly for the best lemon flavour. Older leaves taste coarse. Harvest in the morning after dew dries for maximum essential oil content.
Growing Tips
Contain the spread
Grow in a pot or use root barriers if you don’t want it roaming.
Rejuvenate midseason
Shear back when stems get tall or flower; new leaves are fresher and tastier.
Harvest young
Pick tender tips regularly; older leaves can taste coarse.
Pests & Diseases
Pest Aphids
Identification: Clusters of small green or black insects on shoot tips and leaf undersides; sticky honeydew on leaves
- Squash by hand or blast off with a strong jet of water
- Encourage ladybirds, lacewings, and hoverflies as natural predators
- Spray with fatty acid or plant oil-based insecticide if infestations are heavy
Pest Spider Mites
Identification: Fine webbing on leaf undersides; leaves develop pale stippling and may yellow and drop
- Increase humidity by misting regularly
- Introduce Phytoseiulus persimilis predatory mites under glass
- Spray with plant oil-based miticide
Disease Powdery Mildew Erysiphe spp.
Symptoms: White powdery coating on leaves and stems, especially in late summer; leaves may yellow and distort
Treatment: Cut back affected growth hard — fresh regrowth is usually clean
Prevention: Ensure good air circulation; avoid overcrowding; water at the base rather than overhead
Disease Septoria Leaf Spot Septoria spp.
Symptoms: Small brown or tan spots with dark margins on leaves; heavily spotted leaves yellow and drop
Treatment: Remove and destroy affected leaves; cut back hard to encourage clean regrowth
Prevention: Avoid overhead watering; clear fallen debris in autumn; ensure good spacing for airflow
Popular Varieties
Aurea, Citronella, Compacta, All Gold
Spacing & Planting
| Plant spacing | 45 cm |
| Row spacing | 60 cm |
| Mature height | 60 cm |
| Mature spread | 45 cm |
Spreads; give space or contain. Cut back to rejuvenate.
Log Lemon Balm in your garden — track growth, care, and harvests year after year
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