Consuming healthy food and drinking enough water ever day are the first steps that you need to take for healthy scalp. Include food having C and E vitamin in your diet. Include fish, coconut, amla, etc in your diet. Massage your scalp with oil twice a week. You can use onion oil, coconut oil, amla oil, etc for your scalp. After oiling at night, wash your hair with ayurvedic shampoos the next day. Choosing a good shampoo is very important, otherwise it can damage your hair. These are some tips to grow your hair naturally.