Rumex conglomeratus, commonly known as Clustered Dock, is an annual or biennial herbaceous plant native to a wide range of habitats including riverbanks, roadsides, and disturbed areas in Europe, Asia, and North Africa. It has been introduced to North America where it can become invasive. This species typically grows up to 39 inches (1 meter) in height and features elongated leaves and greenish or reddish-brown flowers that form dense clusters, which are not particularly showy. The flowering season extends from May to July.

Clustered Dock is not commonly cultivated for ornamental purposes due to its invasive nature and lack of notable flowers. However, it is sometimes used in herbal medicine, although caution is advised as the plant can contain high levels of oxalic acid. It prefers full sun to part shade and tolerates a wide range of soil types, though it thrives in moist, nitrogen-rich soils. In terms of water requirements, it can survive in both wet and moderately dry conditions. Gardeners should be aware that Rumex conglomeratus can spread aggressively by seed, and its deep taproot makes it difficult to eradicate once established.CC BY-SA 4.0