Some people's hair doesn't grow past a certain point thats true my aunts won't go past her shoulders, but she has a relaxer and doesn't really look after it.And my old boss hair wouldn't grow past her neck but she was a bottle bleach blond, we kept telling hair she needed to stop whenever she complained about it, but she never did anything.I thought my hair didn't grow but after i cut it off ( and had to go round looking like john legend for a year)It has really grown back and is longer than it has been since i started taking care of my hair myself.Just evaluate what you've been doing to your hair recently, like mine was breaking and i didn't know why and since i'm anti-hairdressers and never needed to really tim in the past i put off trimming for ages and then i did some readingand decided to trim ( and change the way i wash my hair)and it really helped.