Hydrangeas generally should not be cut back, except to remove dead stems---but if pruning is necessary, do so in June or July to prevent harm to next year's blooms.
About this Author
Thomas K. Arnold is the publisher and editorial director of "Home Media Magazine" and a regular entertainment contributor to various publications including "USA Today," "The Hollywood Reporter" and "San Diego Magazine." He has written travel stories for "San Diego Magazine," the "San Diego Union" and the Copley News Service. Arnold attended San Diego State University.