Black mustard is commonly found in neglected gardens, on roadsides, in abandoned fields, and in areas where waste is disposed of. The plant is native to Asia and Europe, but now grows over much of southern Canada and almost all of the United States. This is the chief mustard used in condiments and as such is normally associated with hot-dogs. To make the mustard condiment, the seeds must be ground fine and then mixed with flour and a small portion of water and vinegar. The plant can be cultivated for its young leaves which are used in a salad or as a pot herb.