The essential oils of rosemary, lavender and tea tree oil naturally promote healthy hair growth by unclogging scalp pores, moisturizing hair, promoting circulation and providing antiseptic properties. Other natural oils that are also effective for hair growth include Argan, avocado, coconut, sweet almond, castor and jojoba. Essential oils should not be used by those prone to allergies, are pregnant, have sensitive skin or in undiluted applications.
Essential oils are highly concentrated and can last for years when properly stored in a dark, air-tight bottle. To properly dilute essential oil for a 2.5 percent mixture, combine 15 drops of essential oil per ounce of carrier oil.