Brome grass is best in the cool season. It provides good nurtional value for horses. Bromegrass that is cut and dried is high in protein and fiber, so it is popular for its nutritional value. When buying brome hay that has been baled, you should be sure to inspect the quality of the product before making a purchase. Brome hay bales that are not of good quality do not provide any nutritional value to your horses or livestock. Quality brome hay smells sweet and fresh. Bromegrass is best when harvested at mid-bloom stage.