Found my first grey hair age 19, second year at uni. I was devastated! However my mum (who had very dark brown/ black hair) found her first one at 15.
Nearly 30 years on my roots are now completely grey. I've not been my natural colour for well over 20 years though. I was red for a long time in the 90s, then went more light brown with highlights, back to reddy brown shades. A year ago I stripped and bleached my hair and am now quite a light blonde. The best bit is that I now can't see any roots at all because the grey blends into the blonde whereas when it was dark I was dyeing it every 6 weeks!
Nearly 30 years on my roots are now completely grey. I've not been my natural colour for well over 20 years though. I was red for a long time in the 90s, then went more light brown with highlights, back to reddy brown shades. A year ago I stripped and bleached my hair and am now quite a light blonde. The best bit is that I now can't see any roots at all because the grey blends into the blonde whereas when it was dark I was dyeing it every 6 weeks!