This sounds weird but you can by a type of shampoo called Main' n tail. Well its,um, horse shampoo. BUT! they sell it to us human being type because it actually grows our hair! so if you really want to grow your hair give that a try.
There is an Arabian tradition recipe just buy a aloe Vera plant take the one that have a big and round juicy leaf and take the scale off and but what the inside of the plant in the bladder and some little garlic turn on the bladder just 2 to 5 second and immediately but the mixture in you hair like the way you use your shampoo but without water after that take a shower , this recipe will help you hair skin if you have any damage in you hair or either if you want to make your hair grows fast and it will make your hair shine and healthier
Use less heat if you use a lot already, a lot of people say massage your scalp because it's supposed to stimulate hair growth, and I've also heard don't get trims because your hair grows from the top (not ends) so don't get your ends cut unless you want to fix up your split ends, my friend used a type of shampoo and within a year or less her hair was down to her bum when it used to be chin length. You could also look up some YouTube videos on how to grow your hair longer. I'm sure people will have some more tips on how they grew their hair out and what they used, etc. Hope this helped cx