I need to find out a few things about drug hair testing. More specifically the hair testing they do for casino employment in Las Vegas. I stopped smoking pot 1.5 months ago and I need to know how long It stays in your hair. I had a shaved head when I stopped. I was wondering how long the pot will stay in my hair? If I shaved my head again now,1.5 months later, would it still show if I let it grow now?