Buzzcut & Part Line

How long will it take to go away? Is there a way to speed up the process? It's too hot to wear a hat all the time.
A: The length of time it will take for the part line to "go away" depends on how quickly your son's hair grows.
However, if the hair follicles at the parting line have been subjected to tension by being pulled back long enough to damage the follicle and alter the growth pattern, your son may have to wait until his hair grows out a little and use product to style the hair to direct it all in the way he wants it to be positioned.
©Hairfinder.com
See also:
Hair construction and growth
How would I train my hair to get rid of my straight parting?
Basic hair parting techniques
How to accelerate hair growth