The length that hair grows varies widely, but an average hair growth of 1/2 inch per month is considered normal growth. Regular haircuts help to keep hair growing at a steady pace.
While a haircut does not make hair grow longer, it helps to eliminate broken or split ends, which allows the hair to grow. Depending on how quickly or slowly hair grows, a haircut is recommended once every six to 12 weeks. To maximize hair growth potential, one should make an appointment with a hair stylist once every two months in order to remove dry, damaged ends and allow healthy hair to grow.