Juncus nodosus, commonly known as Knotted Rush, is a rhizomatous perennial herb that is native to a wide range of wetland habitats across North America, from northern Canada to central Mexico. It is typically found in marshes, wet meadows, and along the edges of ponds and streams, where it forms dense clumps. Knotted Rush can grow up to 24 inches tall and is characterized by its slender, smooth, and upright stems. The inflorescence is a distinctive spherical cluster of green or brown pointed flowers that appear in late spring to summer. The plant’s foliage remains an attractive green throughout the growing season.

Knotted Rush is valued for its ability to stabilize soil and contribute to the biodiversity of wetland areas. It is often used in restoration projects and naturalized plantings. In cultivation, it requires consistently moist soils and thrives in full sun to part shade conditions. While it is not typically used in conventional garden settings, it can be an excellent choice for water gardens or rain gardens. Knotted Rush is relatively low maintenance, but gardeners should be aware that it can spread vigorously in ideal wet conditions.CC BY-SA 4.0