Facts about Hair Growth Hair grows at the rate of approximately ½ an inch every month, which is 6 inches per year. But for some people, due to genes, excellent diet and other factors (such as EFT!), the hair growth rate can be much faster, at a rate of up to 1 inch or more per month. There are four stages of hair growth: anagen, catagen, telogen and exogen. The anagen stage is also known as the hair growth phases and it lasts 2 to 7 years and determines the length of the hair. The second stage is the catagen phase, which is the transitional phase and lasts about 10 days. The telogen, also known as the Continue Reading