Arctium tomentosum, commonly known as Woolly Burdock or Downy Burdock, is a biennial herb that is native to temperate regions of Eurasia. It has naturalized in parts of North America, where it often grows in disturbed sites, along roadsides, and in waste areas. Woolly Burdock typically reaches a height of 3 to 7 feet (1 to 2 meters) and is characterized by its broad, heart-shaped leaves and woolly stems. The plant produces globular flower heads in its second year, with purplish flowers that are less showy than those of related species. These flowers bloom in the summer and are followed by burs that can attach to animal fur or clothing, aiding in seed dispersal.

Woolly Burdock is valued for its large, dramatic leaves and architectural form, which can add interest to naturalistic plantings and wildlife gardens. However, it is not commonly used in formal garden settings due to its invasive nature and the potential for the burs to become a nuisance. In cultivation, it prefers full sun to partial shade and can tolerate a range of soil types, provided they are well-drained. Woolly Burdock requires minimal maintenance once established but may need to be controlled to prevent unwanted spread.CC BY-SA 4.0