Watercress plant - Nasturtium Officinale (Cruciferae)

Medicinal Use of Watercress – Nasturtium Officinale (Cruciferae)


Creeping perennial growing to 2 ft (60 cm), with compound leaves, spikes of white 4-petaled flowers, and small sickle-shaped pods.

Habitat & Cultivation

Found in temperate regions throughout the world, watercress thrives alongside or in fresh running water. While commonly found in the wild, it is also widely cultivated as a salad herb. Watercress is best gathered before it flowers in summer.

Parts Used

Aerial parts.


Watercress contains isothiocyanates and is rich in vitamins A, B1, B2, C, and E, and minerals (especially iodine, iron, and phosphorus). Allyl isothiocyanate has broad-spectrum antibiotic activity. Research in the 1960s suggested that watercress might have anti-tumor activity.

History & Folklore

Watercress has long been valued as a food and medicinal plant. Xenophon, a Greek general in the 5th century BCE, attributed other virtues to it, recommending the Persians to feed it to their children to build up their strength. In European folk medicine, watercress has primarily been considered a “blood-cleanser,” and was used in former times as a spring tonic.

Medicinal Actions & Uses

Watercress provides excellent, easily digested nutrition. Its high mineral and vitamin C content makes it particularly suited for chronic ill health and convalescence. It is thought to stimulate appetite, ease indigestion, and counter mucus. A detoxifying herb and food, watercress cleanses the liver, blood, kidneys, and lungs.