How To Grow 1/2 An Inch To An Inch Of Hair In A Week by Gina Akol How To Grow 1/2 An Inch To An Inch Of Hair In A WeekFirst choose an oil of your choice and massage it into the scalp for about a minute or twoAfter massaging your scalp do the inversion method (tip your head upside down) for 4 minutesRise up slowly when time is completed and do this everyday for one week only each month.