Yes it will stay in your hair it could stay there for 2 years I'm a hairdresser I no everything about hair!
Speaking as a hairdresser, I know that it will show in your hair. That one strand of hair can tell them EVERYTHING about you! They'd be able to tell you smoked weed 2 months! That could stay in your hair for up to 2 years!
Look at it this way: Fags kill weed DOESNT! Weed side affects hungry happy sleepy fags side affects cancer