I am 5.7 right now 14 1/2 and im wondering if you can rapidly grow for longer than 3 years as I've heard thats the max of growth spurts. I have grown 9.5 inches since turning 11. I know this as I have been tracking my height accurately on my wall since I was 9. I am not complaining but I have noticed steady growth on around 2-4 inches each year. When 12 I grew 4 inches in a year although I smoked weed? And I checked height calculator's say ill be 6ft. Im just wondering as people who are 7ft usually have a tumour in their pituitary gland. My dad is 5.8ft mum is 5.4 and I have always been short till now. So I will track my growth till 21. My dad said he grew a lot when 15. So im praying for 4 inches that year!