The back and middle of my hair grows the fastest. I am 8 weeks post and the middle of my head (as well as the back ) has 1 inch of new growth. The front looks like it is missing a quarter of that!erplexed I am trying to keep my hair leveled (blunt) but now I have to cut the back off by 1/4 or so. If I don't then my back would look fuller than my sides. How does your hair grow?