Dock is the name of several species of plants found in many regions worldwide. Two common species—the curly dock, also called yellow dock because of the color of the root; and the broadleaf dock—grow as weeds in the United States and Canada. These plants infest gardens and lawns and are common along waysides. They grow from 2 to 4 feet (61 to 122 centimeters) high and have long, large leaves with wavy edges. Their small, greenish or reddish flowers are often dried for flower arrangements. Their large roots are used medicinally for tonics, astringents, and skin remedies. Docks may be controlled by pulling out the root or by spraying with a herbicide (chemical weedkiller).
