Ornamental grasses should be cut back in the fall once they have gone dormant. Cut back an ornamental grass to a height of 6 to 8 inches. Alternatively, if you want to retain a winter grass effect, cut it back in the very early spring before new growth appears.
About this Author
Tina Samuels has been a full-time freelance writer for more than 10 years, concentrating on health and gardening topics, and a writer for 20 years. She has written for "Arthritis Today," "Alabama Living," and "Mature Years," as well as online content. She has one book, “A Georgia Native Plant Guide,” offered through Mercer University; others are in development.