Widespread - most plentiful on wet soils. Perennial.
Has large broad leaves and a taproot. Produces buds that turn a reddish colour.
Seeds are long-lived, so large banks of seed can build up in the soil. When dock-infested paddocks are cultivated, they are soon reinfested, both from seedlings and regrowth of roots. Sheep eat docks, but cattle and horses avoid them.