Lemon balm
Melissa officinalis · Lamiaceae
📷 Lazaregagnidze · CC BY-SA 4.0
The gardener's calendar
Ideal time to plant lemon balm: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Common name
- Lemon balm
- Family
- Lamiaceae
- Type
- Herbaceous perennial
- Foliage
- Deciduous to semi-evergreen
- Flowering
- June to August, white or pale flowers
- Adult height
- 60 to 80 cm
- Hardiness
- Very hardy (−15 °C)
- Origin
- Mediterranean basin and Southwest Asia
✓ Taxonomy verifiedSource: AI estimate · hardiness: reliability high.
Expert tips
The key tip
Lemon balm grows very easily but depletes the soil quickly. Divide it every 2 years in spring to keep young, vigorous plants.
The common mistake
Letting it go to seed without pruning: it becomes spindly, loses flavor and gets overrun with weeds.
The pro's trick
Pinch off the flowers as soon as they appear if you're mainly growing it for the leaves: it stays dense and flavorful much longer.
Care
Light exposure
Lemon balm appreciates full sun for vigorous growth and optimal development of essential oils. It tolerates partial shade without issue. Install it in a sunny spot for at least 4 to 6 hours per day for best results.
Watering
Keep the soil regularly moist without waterlogging it, especially during the growing season. Water deeply 2 to 3 times a week in summer, reduce in winter. Once established, lemon balm tolerates some dryness well, but prefers fresh soil.
Soil
Well-drained soil rich in organic matter is ideal. Lemon balm adapts to most soil types, from chalky to slightly acidic. Improve poor soil with well-decomposed compost at planting time.
Pruning and harvesting
Pinch young stems regularly to encourage compact, bushy growth. Harvest leaves as needed from June onwards, cutting them by hand or with scissors. In autumn, cut the plant back to ground level to stimulate vigorous regrowth in spring.
Fertilizing
Moderate feeding is sufficient: incorporate compost in spring when growth begins. A balanced slow-release fertilizer in May-June supports growth. Avoid excess nitrogen, which may reduce the concentration of essential oils.
Diseases and pests
Lemon balm is generally very robust. Watch for spider mites in dry, hot conditions. Powdery mildew can appear with stagnant humidity; ensure good air circulation and avoid wetting the foliage.
Did you know?
Since antiquity, lemon balm has been revered for its soothing properties: medieval monks cultivated it in monastery gardens to prepare the famous 'Eau de Mélisse des Carmes,' an elixir reputed to extend life. Its characteristic lemony aroma also makes it a staple of traditional European herbalism.
Where to buy it
Plant in spring or early autumn, avoiding spells of intense heat. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, April, May, September.
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Tips generated and checked by Viridia — adapt them to your local climate.