DIY scalp treatment - stimulate the scalp for faster hair growth. Full tutorial. My all time favorite recipe: Take about 4 tablespoons softened coconut oil, mix with 2-4 (depending on sensitivity) drops tea tree oil, and 3-4 drops of rosemary oil. This is dreamy. Ingredients from the kitchen: I mix 4 tablespoons coconut oil with 2 tablespoons lemon juice and 1 tablespoon grapefruit juice.