How to Grow Lemon Balm: Complete UK Guide

There are plants you grow because they are useful, and plants you grow because they make you happy. Lemon balm is both. Run your fingers along a stem on a warm morning and the scent that rises — clean, citrus-bright, unmistakably fresh — is one of the most immediately uplifting things the herb garden has to offer. It asks very little of you. It comes back every year without fail. And it produces, season after season, more than enough for teas, tinctures, culinary use, and simply brushing past on your way down the garden path.

Lemon balm is one of the most accessible herbs for beginners and one of the most valued by experienced herb growers. If you are building a garden with calm and wellbeing in mind, it belongs in it without question.

What is Lemon Balm?

Lemon balm (Melissa officinalis) is a fully hardy herbaceous perennial in the mint family (Lamiaceae). Native to southern Europe and the Mediterranean, it has been cultivated in British gardens for centuries and naturalises happily in UK conditions. It forms a bushy clump of bright green, slightly crinkled leaves with a distinctly lemon scent — the result of volatile oils including citral and citronellal — and produces small white flowers in summer that are extremely attractive to bees. Melissa is, in fact, the Greek word for honeybee.

It is vigorous, productive and generous to a fault. Left unchecked it will spread — both by underground runners and by self-seeding — so it benefits from a little management. In a container it is perfectly well-behaved; in open ground it will colonise cheerfully if given the chance.

Growing Lemon Balm in the UK

Soil and Position

Lemon balm is unfussy about soil, which is part of its charm. It will grow in most UK soils from light sandy to moderately heavy clay, preferring a pH of around 6.0 to 7.5. It does best in a sunny or partially shaded position — full sun encourages the most aromatic leaves, but it will tolerate dappled shade better than most herbs. Avoid persistently waterlogged soils; drainage does not need to be perfect, but standing water will cause root rot.

When to Plant

Plant lemon balm plants in spring (April to May) once the risk of frost has passed, or in early autumn (September) to allow autumn establishment. It establishes quickly and you will likely see strong growth in its first season.

Planting Out

• Space plants 45cm apart — they spread to form substantial clumps
• Plant at the same depth as the plug
• Water in well after planting
• In open ground, consider planting inside a buried pot or root barrier if you want to limit spread

Watering and Feeding

Water regularly in the first growing season to aid establishment. Once established, lemon balm is largely drought-tolerant and needs minimal watering in all but the driest summers. Feed lightly with a balanced organic fertiliser in spring. Over-feeding produces lush, less aromatic growth — a light touch is better.

Cutting Back

Cut lemon balm back hard once or twice during the growing season to encourage fresh, bushy growth and prevent it from becoming leggy or going to seed. After flowering, cut the whole plant back by two thirds — it will regrow quickly with fresh, highly aromatic leaves. This also prevents excessive self-seeding.

Winter

Lemon balm dies back completely in winter in most UK gardens. The roots survive and the plant re-emerges reliably in spring. No winter protection is needed. In very cold or exposed gardens a light mulch over the crown in late autumn provides extra reassurance.

Harvesting Lemon Balm

Harvest leaves throughout the growing season as needed — pick in the morning after any dew has dried, when the aromatic oils are at their peak. For drying, cut whole stems just as the plant comes into flower. Tie in small loose bundles and hang in a warm, well-ventilated space out of direct sunlight. Dried lemon balm loses some of its fresh citrus vibrancy but retains its herbal qualities well.

Fresh leaves make the most aromatic tea — a small handful steeped in just-boiled water for five to eight minutes produces a gentle, pleasantly citrus infusion. It pairs beautifully with chamomile and valerian in a calming evening blend.

Lemon Balm in Herbal Tradition

Lemon balm has a long and well-documented history in European herbal practice. It was used by ancient Greek and Arab physicians, brought to Britain by the Romans, and cultivated in monastery gardens throughout the medieval period — including famously at Charlemagne's court, where it was listed among essential herbs for cultivation. It is traditionally associated with calm, gentle relaxation, and digestive comfort, and has been used in teas, tinctures and culinary preparations for centuries.

Paracelsus called it the "elixir of life." That might be overstating it, but the plant's enduring popularity across so many centuries and cultures speaks for itself.

As with all herbs, we recommend consulting a qualified herbalist or healthcare professional before use, particularly if you are pregnant, breastfeeding or taking medication.

Lemon Balm in the Kitchen

Beyond herbal use, lemon balm is a genuinely useful culinary herb. The fresh leaves add a subtle lemon note to salads, fruit desserts, sorbets and soft drinks. It is particularly good with fish, in herb butters, and as a garnish for summer drinks. The flavour fades quickly on cooking, so add it fresh at the last moment.

More in the Sleep & Calm Series

Lemon balm is a key plant in a garden grown for calm and wellbeing. Read our full guide: Best Herbs for Sleep and Relaxation: A UK Grower's Guide, or explore:

• How to Grow Valerian: Complete UK Guide
• How to Grow Chamomile: Complete UK Guide
• How to Make a Calming Herbal Tea Blend at Home
• How to Grow American Skullcap: Complete UK Guide

Frequently Asked Questions

Is Lemon Balm invasive?

It can be vigorous in ideal conditions — spreading by runners and self-seeding. In a container it stays well-behaved. In open ground, cut it back before it sets seed and it remains manageable. Many gardeners find its enthusiasm an asset rather than a problem.

Can I grow Lemon Balm in a pot?

Yes — it grows very well in containers. Use a pot of at least 30cm diameter, a good quality peat-free compost, and water regularly in summer. Container plants may need dividing every two years as they become pot-bound.

Is Lemon Balm the same as Lemon Verbena?

No — they are different plants. Lemon balm (Melissa officinalis) is a hardy perennial; lemon verbena (Aloysia citrodora) is a tender shrub requiring winter protection in the UK. Both have a lemon scent but they are botanically unrelated.

When does Lemon Balm flower?

Lemon balm typically flowers from June through to August, producing small white flowers along the stems. Many growers cut the plant back before or just as flowering begins to maintain the most aromatic leaf growth.

The information in this article is intended for general interest and educational purposes only. It does not constitute medical advice. Always consult a qualified healthcare professional before using any plant or herb for health purposes, particularly if you are pregnant, breastfeeding, or taking medication.