Cleavers

Cleavers (Galium aparine)

Close-up of a small green plant with fuzzy leaves and tiny white flowers, surrounded by other green foliage.

Plant family

  • Rubiaceae (Coffee family)

Parts used

  • Aerial parts

Typical forms of prescription

  • Infusions

  • Tinctures

Cleavers (Galium aparine) by Nat Middleton

Cleavers (Galium aparine) - Clinical Snapshot

Primary Actions

  • Lymphatic

  • Diuretic

  • Astringent

  • Depurative

  • Mild laxative

  • Anti-inflammatory

  • Alterative

  • Vulnerary

Primary Indications

  • Chronic skin conditions

  • Constipation

  • Inflammation of the gastrointestinal tract

  • Cystitis

  • Prostatitis

  • Swollen glands

  • Tonsillitis

  • Wound healing

⚠️ Cautions / Safety⚠️

  • Some reports of dermatitis from contact with the plant’s tiny hooks.

Flavonoids

  • Action: Antioxidant, anti-inflammatory, capillary-protective.

  • Use: Flavonoids support blood vessel integrity and help modulate inflammation. In Cleavers, they work synergistically with iridoids to calm the skin and clear the lymphatic system.

Galium aparine

Phytochemistry and Pharmacology

Iridoids (e.g., Asperuloside)

  • Action: Anti-inflammatory, lymphatic, mild diuretic, detoxifying.

  • Use: Iridoids, such as asperuloside, help support lymphatic drainage, reduce tissue inflammation, and encourage gentle detoxification. They contribute to Cleavers’ reputation as a key herb for swollen glands, skin eruptions, and urinary sluggishness.

Tannins

  • Action: Astringent, toning, anti-inflammatory.

  • Use: These compounds help tone tissues, reduce excessive secretions, and contribute to Cleavers’ use in skin conditions and minor wounds. They also support the urinary tract by tightening irritated mucous membranes.

Cleavers (Galium aparine) by Nat Middleton

Traditional use

Cleavers have been used for centuries in folk medicine and rural life. Traditionally applied as poultices for burns, wounds, and skin irritation, they were also fed to poultry to encourage weight gain. The plant’s tiny seeds, botanically related to coffee, were once roasted and brewed as a coffee substitute. Its sticky stems made it a practical tool for straining milk, reflected in its Latin name Galium, derived from the Greek gala (milk). In spring, cleavers were commonly taken as a tonic, steeped in cold infusions for nine days or nine weeks to “cleanse the blood” and refresh the system after winter.

Description

Cleavers (Galium aparine) is a key lymphatic herb, often paired with Calendula officinalis to stimulate lymph flow, reduce swollen lymph nodes, and clear chronic skin conditions such as acne, eczema, and psoriasis. By supporting lymphatic drainage, cleavers helps the body process waste products, inflammatory debris, and pathogens, especially around the digestive tract, where a large portion of the immune system resides.

Its gentle diuretic action makes it useful in urinary tract infections and fluid retention, while its high silica content contributes to tissue repair, especially when used as a fresh poultice for wounds, burns, or slow-healing skin.

Cooling, cleansing, and mildly toning, cleavers is well-suited for those with skin eruptions, sluggish lymph, or systemic inflammation. It can be taken fresh in cold infusion, added to green juices, or tinctured.

Cultivation/Harvesting

Cleavers is a fast-growing annual that thrives in shady hedgerows, damp gardens, and disturbed ground. It grows prolifically in late winter and early spring, often forming mats of bright green, sticky stems.

Harvest the top two-thirds of the plant before it flowers or goes to seed, ideally in early spring. Use fresh for best results, as drying diminishes its potency. Allow the lower portion to regrow for a second harvest.

Cleavers (Galium aparine) by Nat Middleton

Key Botanical Features of Cleavers (Galium aparine)

Growth

  • Type: Annual, scrambling or climbing herb.

  • Size: 30–150 cm (1–5 feet) long, weak-stemmed.

  • Stem: Slender, square-shaped, covered in tiny, hooked hairs, helping it cling to surfaces.

Leaves

  • Type: Whorled, with 6–8 leaves per node.

  • Shape: Narrow, lanceolate (spear-shaped).

  • Size: 1–7 cm (0.4–2.8 inches) long.

  • Texture: Covered in fine, backwards-facing hooked hairs, making it sticky to the touch.

Flowers

  • Type: Small, star-shaped, clustered in loose groups.

  • Colour: White to pale green.

  • Size: About 2 mm (0.08 inches) in diameter.

  • Blooming Period: Late spring to summer.

  • Pollination: Insect-pollinated (bees, flies).

Fruits & Seeds

  • Fruit Type: Small, dry, round schizocarp, splitting into two seeds.

  • Size: 1–5 mm (0.04–0.2 inches) in diameter.

  • Surface: Covered in hooked bristles, aiding in animal dispersal.

Roots

  • Type: Shallow, fibrous root system.

  • Function: Helps the plant spread quickly in disturbed soils.

Habitat & Growth Conditions

  • Climate: Temperate and subtropical regions.

  • Soil: Prefers moist, nutrient-rich, well-drained soil.

  • Sunlight: Thrives in partial shade to full sun.

  • Distribution: Native to Europe, Asia, and North America, commonly found in hedgerows, fields, and waste areas.

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.
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