Due to its density, the application of castor oil might be a bit hard. For this reason you should better dilute it and mix it with equal amount of coconut oil. Apply it on the scalp with a gentle massage, spreading it EVENLY on the hair strands, and let it act for 1 hour. Repeat the procedure 2 times per week before you wash your hair.
If you want to use it to treat split ends or for dry hair, take 2-3 drops of castor oil in your palm and rub it on a dry and fizzy hair, letting it act during the night.