Motherwort

Motherwort (Leonurus cardiaca)

Close-up of a green plant with elongated leaves and clusters of small pink and white flowers on a tall stem.

Plant family

  • Lamiaceae

Other significant names:

  • Lion’s tail

  • Heartwort

Parts used

  • Herba (flowering stage)

Common prescription forms

  • Tinctures 

  • Infusions

Close-up of a green plant with a purple flower spike and oval-shaped, serrated leaves.

Leonurus cardiaca (Motherwort) - Clinical Snapshot

Primary Actions

  • Antispasmodic

  • Anxiolytic

  • Cardiotonic

  • Hypotensive

  • Diaphoretic

  • Astringent

  • Bitter

  • Partus preparator / Parturient (prepares and assists labour)

  • Emmenagogue

  • Nervine

  • Thymoleptic (mood-enhancing)

  • Immunostimulant

  • Antiviral

  • Antibacterial

  • Sedative

  • Hepatic (liver tonic)

  • Laxative

  • Analgesic

Primary Indications

  • Palpitations, tachycardia (especially with hyperactive thyroid)

  • High blood pressure, angina, blood clots, high cholesterol, and narrowed arteries

  • Stress-related digestive issues: acidity, heartburn

  • Anxiety, insomnia, grief, nervous tension

  • Painful or delayed periods, cramps, back pain, vaginismus

  • Low fertility, low libido

  • Support during childbirth (reduces tension, prepares uterus)

  • Preventative for postpartum infection and postnatal depression

  • Menorrhoea (heavy periods) / scanty flow, PMS, menopausal mood swings

  • Menstrual headaches, hot flushes, endometriosis, fibroids

  • Vaginal elasticity support, herpes, bacterial and fungal infections

  • Chronic fatigue

⚠️Cautions / Safety⚠️

  • May interfere with cardiovascular treatments

  • May increase menstrual flow

  • Use only in the final weeks of pregnancy

Alkaloids

Includes: Leonurine, stachydrine
Action: Uterotonic, hypotensive, cardiotonic, antispasmodic
Use: These alkaloids give motherwort its unique ability to stimulate and tone the uterus while also exerting a calming effect on the heart and nervous system. Leonurine is particularly noted for its cardiotonic and relaxing effects on smooth muscle, making motherwort effective in cases of palpitations, anxiety, tension, and menstrual cramps, especially when linked to emotional distress.

Leonurus cardiaca

Phytochemistry and Pharmacology

Iridoids

Includes: Leonuride
Action: Bitter, anti-inflammatory, nervine
Use: Iridoids contribute to motherwort’s bitter taste and help stimulate digestion while supporting anti-inflammatory and nervous system-calming effects. They help balance the herb's action between restoration and stimulation.

Flavonoids

Includes: Rutin, quercetin
Action: Antioxidant, vascular protective, mild sedative
Use: Flavonoids support circulation, reduce inflammation, and reinforce motherwort’s use in cardiovascular and nervous system health, particularly in stress-related hypertension, mild tachycardia, or tension headaches.

Triterpenes

Includes: Ursolic acid
Action: Anti-inflammatory, antispasmodic, hepatoprotective
Use: These compounds enhance tissue healing, reduce spasms, and support liver and hormonal balance, especially in reproductive system conditions such as painful or irregular menstruation.

Bitter Principles

Action: Digestive stimulant, uterine tonic
Use: Motherwort’s bitter quality enhances digestive fire (Agni) and supports uterine tone, making it especially useful postpartum or for uterine atony. Its bitters also contribute to emotional grounding, often part of its traditional use profile.

A close-up of a tall, green plant with small pink flowers and elongated, jagged leaves in a garden setting with pink and purple flowers in the background.

Traditional use

Motherwort has a long history of use in European herbal traditions, with records dating back to the Middle Ages. It was commonly prescribed for gynaecological disorders, particularly those related to childbirth, postpartum recovery, and melancholy after delivery. It was traditionally taken to calm the womb, regulate menstruation, and support emotional balance in women, especially during significant hormonal transitions.

Its name reflects this role, “mother’s herb,” many traditional healers considered it a core remedy for women’s health through all life stages.

Clinical discussion

Motherwort (Leonurus cardiaca) is a deeply nourishing nervine and cardiotonic, valued for its support during times of emotional and physical transition. UK herbalist Christopher Hedley poetically noted that “the leaves of motherwort are shaped like helping hands,” symbolising the support it offers—especially in stages such as menarche, menstruation, childbirth, postpartum, and menopause.

Its name—Leonurus cardiaca, meaning "lion-hearted"—also reflects its use in calming heart-centred anxiety, particularly when associated with:

  • Palpitations

  • Nervous tension

  • Hyperthyroid-related anxiety

  • Hypertension with insomnia

Motherwort is often chosen for its gentle but steady emotional holding—particularly for individuals who feel overwhelmed, under-supported, or emotionally frayed. It is not sedating, but rather steadies the pulse, grounds emotion, and helps build resilience under stress.

Clinical research and traditional use support its use in:

  • Mild to moderate hypertension

  • Palpitations due to anxiety or hyperthyroidism

  • Graves’ disease (adjunctively)

  • Irritability and PMS

  • Menopausal anxiety or insomnia

While traditionally associated with women’s health, motherwort is valuable for all genders, especially where emotional unrest affects cardiovascular function.

It is most commonly used as a tincture, though infusions may also be used (bitterness can be intense). It pairs well with hawthorn, milky oats, or lemon balm depending on the emotional and physical presentation.

Cultivation/harvesting

Motherwort is a hardy perennial (occasionally annual in colder zones) that thrives in sun to partial shade and well-drained soil. It readily self-seeds and is tolerant of poor soils, making it an easy addition to wild-style gardens or herb borders.

  • Harvest when the plant is in full flower, usually in July or August.

  • Use flowering tops and upper leaves, ideally gathered on a dry day after morning dew has lifted.

  • Caution: The sharp, hooked calyces can be irritating to skin, so wear gloves when harvesting.

Hang in small bundles to air-dry in shade, or tincture fresh for full potency.

Once established, motherwort can form dense stands and will return reliably each year, bringing strength and calm to the garden as well as the dispensary.

Green leafy plant with variegated leaves in a terracotta pot on a weathered wooden surface.

Key Botanical Features of Motherwort (Leonurus cardiaca)

Growth

  • Type: Perennial herb.

  • Size: Grows 50–150 cm (1.5–5 feet) tall.

  • Stem: Erect, square-shaped, and covered with fine hairs, typical of the mint family.

Leaves

  • Type: Opposite, palmately lobed.

  • Shape: Deeply lobed with 3–5 segments, resembling a lion’s tail.

  • Size: 4–12 cm (1.5–5 inches) long.

  • Margins: Serrated.

  • Texture: Soft and slightly hairy.

  • Colour: Dark green on top, lighter underneath.

Flowers

  • Type: Small, tubular, bilabiate (two-lipped) flowers, typical of the mint family.

  • Size: 1 cm (0.4 inches) long.

  • Colour: Pale pink to purplish.

  • Flower Arrangement: Found in whorls around the stem at leaf axils.

  • Blooming Period: Mid to late summer (June–August).

  • Pollination: Primarily by bees and other pollinators.

Fruits & Seeds

  • Fruit Type: Small nutlets (schizocarps).

  • Dispersal: Primarily by wind and animals.

Roots

  • Type: Fibrous root system.

  • Function: Helps stabilise and spread soil.

Habitat & Growth Conditions

  • Climate: Prefers temperate climates.

  • Soil: Grows best in well-drained, loamy, or sandy soils, tolerates poor soil.

  • Sunlight: Prefers full sun to partial shade.

  • Water Requirements: Moderate moisture, but can tolerate dry conditions.

  • Distribution: Native to Europe and Asia.

Sustainability/conservation

Sources

Bartram, T. (1998). Bartram’s Encyclopedia of Herbal Medicine. Constable.

Fisher, C. (2009). Materia Medica of Western Herbs, (2018 edition). Finchley Road, London. Aeon Books.

Hedley, C & Shaw, N. (2020). A herbal book of making and taking. Finchley Road, London. Aeon Books.

Hoffmann, D. (2003). Medical Herbalism: The Science and Practice of Herbal Medicine. Healing Arts Press.

McIntyre, A. (2019). The complete herbal tutor, revised and expanded edition. Finchley Road, London. Aeon Books.

Plants of the World Online | Kew Science. (n.d.). Plants of the World Online. https://powo.science.kew.org/

Disclaimer: This page is for educational purposes only. Consult a qualified medical herbalist before using herbs, especially during pregnancy, when trying to conceive, while breastfeeding, for medical conditions, or with children.
Read the full disclaimer → Medical Disclaimer.