Rumex crispus × obtusifolius, commonly known as Hybrid Dock, Bitter Dock, or Curly Dock, is a hybrid herb that is a cross between Rumex crispus (Curly Dock) and Rumex obtusifolius (Broad-leaved Dock). This perennial herb typically grows rapidly to a height of 2-4 feet (0.6-1.2 meters) and a width of 1.5 feet (0.5 meters). It is characterized by its wavy or curled leaf edges and green, inconspicuous flowers that bloom in the summer. The flowers are not particularly showy, but they produce a large quantity of seeds, contributing to its invasive potential.

Hybrid Dock thrives in disturbed areas such as roadsides, fields, and waste places, often found in full sun or part shade. It prefers medium or fast-draining clay or loam soils and requires medium amounts of water. While it is not typically cultivated for ornamental purposes, it can be used in wildflower meadows or naturalized areas where its aggressive nature is not a concern. Gardeners should be cautious, as it can become invasive outside its native range, which includes Europe and parts of Asia. It is known for its medicinal properties, particularly for its use in treating skin conditions and as a laxative. However, its potential to spread and outcompete native vegetation should be carefully managed.CC BY-SA 4.0