Spearmint oil is used to flavor toothpastes and chewing gums, as well as other mouth-care products and pharmaceuticals. Flax is also grown as a source of fiber, but it is grown in North America mostly for its oilseed. It is one of Canada's five most valuable crops. Floriculture is the cultivation of flowers for ornamental purposes. Hay is grass that has been cut and dried for use as livestock feed.
Tobacco is the well known drug used in cigarettes, cigars and pipes.
Each State's Most Important Crop in 1998 This map indicates each state's most valuable crop in 1998. Hay is the most valuable crop in the more arid states, including Wyoming, the Great Basin and the Southwest. However, lettuce is the most valuable crop in Arizona, thanks to irrigation. Apples are important in Washington and New York, potatoes in Idaho and Maine. Plants raised nurseries or greenhouses are important in Oregon, Pennsylvania and some of the New England States, with cranberries taking the lead in Massachusetts.