Sage can be used in essential oil form for use in scalp massage or herbal tea form as a hair rinse to help to encourage hair growth. According to nutritionist Phyllis A. Balch in her book, “Prescription for Dietary Wellness,” sage tea rinses may be effective treatments for promoting new hair growth. You can make a homemade herbal sage tea rinse by adding 1/4 cup of dried sage to a cup of water and allowing it to steep for 10 minutes. Sage essential oil may also serve a similar function. The University of Maryland Medical Center recommends mixing sage oil with rosemary and peppermint essential oils in a base of olive oil for use in scalp massage to stimulate new hair growth.