In what hardiness zone does Japanese grass grow best?

Japanese grass or Japanese forest grass is best grown in USDA hardiness zones 4-9. This foliage plant grows well in full sun or partial shade.

Japanese forest grass is used both as bordering plants and as a ground cover. This plant grows to a height and spread of 1 to 3 feet. When Japanese forest grass is grown in full sun, the foliage is a golden yellow, and a mix of yellow and green when grown in the shade. Japanese forest grass requires weekly watering with extra water during hot days. Japanese forest grass reaches its full height within three years.