To a new hair transplant patient, waiting for his hair to grow in can seem like an eternity. For those of us who have been there, we are anxious to see our new “look.” In 3 to 6 months on average, patients will notice their new grafts growing in, slowly at first and not all at the same time. Hair grows at the rate of 1 cm to 1/2 inch per month. Just be patient and keep in mind that for some hair transplant patients, waiting 10 to 14 months is necessary.