Nasturtium officinale, commonly known as Watercress, is a rapidly growing, semi-aquatic perennial herb native to Europe and Asia. It is typically found in the shallow running water of streams and springs, particularly those with a chalky substrate, which contributes to its preference for slightly alkaline conditions. Watercress can reach heights of 20 to 47 inches and has a sprawling habit with pinnately compound leaves. From April to October, it produces small, white flowers that are arranged in clusters and are attractive to pollinators such as hoverflies.

Watercress is valued for its peppery-flavored leaves, which are high in vitamins A, C, and K, as well as minerals like calcium and iron, making it a nutritious addition to salads and sandwiches. It is also used medicinally for its purported health benefits. In cultivation, Watercress requires consistent moisture and can be grown in water gardens or containers with adequate water supply. It is a popular crop in areas like Hampshire, UK, due to its ease of growth and market demand. However, gardeners should be cautious as it can become invasive outside its native range, spreading rapidly and potentially outcompeting native vegetation.CC BY-SA 4.0