It takes an average of 6 to 8 months for 6 inches of hair to grow depending on the individual’s genetics, age, and overall health. Hair growth rate is based on a number of factors including hormones, nutrition, lifestyle habits and even environment. Genetics plays a huge role in determining how quickly your hair grows as some people may experience faster or slower growth than others. Additionally, older individuals typically have a slower rate of hair growth due to hormonal changes that occur with age. Eating well-balanced meals rich in proteins, vitamins and minerals can also affect the speed at which your hair grows since these nutrients help fuel healthy follicle production and stronger strands. Finally, leading a healthy lifestyle by avoiding stressors such as smoking or excessive drinking can increase blood flow to the scalp which gives you better results when it comes to growing out your locks.