Hair grows in three phases Anogen, Catogen and telogen, ... growing, shedding and resting phases to you and me. The longer the growing phase, the longer your hair will grow. Hair grows 1.5 cms a month end of story! Nobody's hair grows much faster or slower. But some peoples hair stays in the growing phase much longer and grows to be gorgeous, long sleek hair past the waist, whilst others can barely grow it past their ears. This is due to a shortened life cycle of the follicle. Women with fine hair that will not grow long are particularly at risk of hair loss when passing the menopause.