Canada lily wildflowers, native to the eastern areas of Canada and the United States, are hardy plants that grow in USDA growing zones 3 through 9. The plants, which reach mature heights of 2 to 5 feet, are commonly found growing along roadsides, in moist meadows and woodlands, along streams, or in marshy areas. The nectar from the fragrant blooms is highly attractive to hummingbirds, butterflies and bees.