Does lemon balm need full sun?

It prefers full sun but will happily grow in partial shade.

How do I keep it from spreading?

Deadhead the flowers before they go to seed to prevent self sowing.

Plant guide

Mélisse.

Melissa officinalis

Pronounced meh-LISS-uh oh-fiss-ih-NAH-liss

Also known as Balm, Beebalm, Common Balm, Lemonbalm, Melissa

Lemon balm is a cheerful, fragrant herb that belongs to the mint family. It is well loved for its citrusy scent and its ability to spread quickly in the garden. You will find it is a hardy perennial that is quite easy to grow.

At a glance

Care level: Easy
Plant type: Herbaceous perennial
Light: Full sun to partial shade
Indoor light: Bright indirect
Water: Every 3 to 7 days
Mature size: 60 to 90 cm
Growth rate: Fast
Hardiness: USDA 3 to 9
Bloom time: Early to late summer

Care

Keep the soil consistently moist but not waterlogged to ensure the best growth. Watch for powdery mildew if the air circulation is poor, and trim the plant back after flowering to encourage fresh, bushy growth. It is a vigorous grower, so keep an eye on it to prevent it from taking over your garden beds.

Watering: Water when the top inch of soil feels dry to the touch.
Feeding: Apply a balanced liquid fertilizer during the active growing season.
Pruning: Trim back stems regularly to promote bushiness and prevent legginess.
Repotting: Repot when the roots have filled the container or the plant becomes root bound.
Soil: Well-draining, fertile, loamy soil
Soil pH: 6.7 to 7.3
Temperature: -20 to 35°C
Humidity: 40 to 70%
Drought tolerance: Moderate
Lifespan: Perennial, typically 5 to 10 years
Fragrance: Strong
Deer and rabbits: High

Signs it needs repotting

Roots growing out of the drainage holes.
Stunted growth despite regular care.
Water running straight through the pot without soaking in.

Safety

People: It is considered non toxic to humans when consumed in culinary amounts.
Pets: It is generally considered safe for cats and dogs, though large ingestions may cause mild digestive upset.
Children: It is safe for children, but always supervise them to ensure they do not ingest large quantities of raw plant material.
Contact allergens: Some individuals may experience mild skin irritation from the essential oils in the foliage.
Airborne allergens: The pollen is generally not considered a significant airborne allergen.
Edibility: While generally safe in moderation, consult a professional if you have thyroid conditions or are taking sedative medications.

How to identify it

Wrinkled, ovate, bright green leaves
Opposite leaf arrangement on stems
Distinctive lemon scent when crushed
Small white or pale yellow flowers
Square stems typical of mints

Height: 0.3 to 0.9m
Spread: 0.3 to 0.6m
Leaves: bright green, dark green, deciduous
Flowers: white, pale yellow, 0.5 to 1cm

Problems to watch for

Leaf SpotCommon
Powdery MildewCommon
AphidsUncommon
Mint RustUncommon

By symptom

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Growing it

Propagation: division, seed, cuttings
When to plant: spring, autumn
Overwintering: Cut the plant back to the ground after the first frost. It will naturally go dormant and return from the roots in spring.
In containers: It grows very well in containers, which is recommended to control its spread, using at least a 30 cm pot.

Division

1. Dig up the entire plant in spring or fall.
2. Use a sharp spade to divide the root clump into smaller sections.
3. Replant the divisions immediately in well draining soil.

Seed

1. Sow seeds on the surface of moist soil in spring.
2. Press them lightly into the soil but do not cover, as they need light to germinate.
3. Keep the soil consistently moist until seedlings emerge.

Plant lemon balm in pots if you want to keep it from taking over your entire garden bed.

Grows well with

Basil — Both herbs enjoy similar soil conditions and sun exposure.
Tomato — Lemon balm is thought to improve the flavor of nearby tomatoes.

Similar species

Catnip — It has a similar growth habit but lacks the distinct lemon scent.
Mint — Both are vigorous members of the Lamiaceae family that spread rapidly.

Science

Family: Lamiaceae
Genus: Melissa
Order: Lamiales
Class: Magnoliopsida
Native range: Southern Europe and the Mediterranean region.
Conservation: This plant is not of conservation concern and is widely naturalized in many regions.

It thrives in disturbed soils and woodland edges where it can spread via rhizomes and prolific seed production.

Value to wildlife: excellent nectar source, attracts beneficial insects
Pollinators: bees, butterflies
Uses: culinary herb, herbal tea, aromatic garden plant, pollinator attractant

Through the year

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Flowering

Fruiting

Foliage

Ecological indicators

Salinity: 2/9
Soil reaction: 6/9
Light: 6/9
Temperature: 5/9
Moisture: 5/9
Nutrients: 5/9

Taxonomy resolved against GBIF.

Questions people ask

Does lemon balm need full sun?: It prefers full sun but will happily grow in partial shade.
How do I keep it from spreading?: Deadhead the flowers before they go to seed to prevent self sowing.

Where the name comes from

The genus name Melissa is Greek for bee, reflecting its popularity with pollinators, while officinalis indicates its historical use in medicine.

Good to know

The name Melissa comes from the Greek word for honey bee.
It has been used for centuries to help calm nerves and improve sleep quality.
The leaves smell like lemon because they contain citronellal and citral.
It spreads quite easily by seed and can become invasive in ideal conditions.

Also in

Deer-resistant plants

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This guide was generated with AI and checked against GBIF taxonomy. It is general information, not horticultural or veterinary advice. Read about how we build these guides.