How your hair grows, and how quickly it grows depends on your genetics. But what you can do is shampoo your hair with the right shampoo according to your hair. For example..... If you have dry hair, and scalp, you would be better off using a acidic shampoo. If you have oily scalps you want an alkaline shampoo. But you should visit your local stylist to get the right shampoo for your hair. Also keep getting the touch ups that you need. Wrap your hair at night, and do not put any harsh chemicals in it.