how long does it take to groe hair
General Considerations. Hair grows approximately Â½ inch per month, for a total of six inches in one year. This rate is an average across races. Asian hair grows slightly faster than this average, Caucasian hair grows near the average,and black hair trends to grow at or just below this average each month.any factors determine the length of time it takes for a person to grow out their hair and reach certain hair lengths. This article will try to offer some guidance for length planning. As you read, bear in mind that the time estimates listed for growing out the hair in this article are just that-estimates.