A powerful stimulant, rosemary’s popularity as a hair tonic has increased in recent years because of its ability to improve scalp circulation, which can encourage the growth of thicker, stronger hair. You can find rosemary essential oil in our rosemary hair oil, a pre-blended treatment to strengthen and nourish hair whilst keeping your scalp healthy and encouraging hair growth. Alternatively, add a few drops of rosemary to your shampoo or conditioner, or combine it with a blending oil to use as a hair mask.