I was a regular user of marijuana,I haven't touched a thing in 45-50 days.will I pass a hair follicle test at a cutoff of 1 pg/mg? I have never in my life touched any other drug,my hair has always been cut every month. I keep it cut 3/4 inch long.I shave chest and privates always and my armpit hair is only around 3/4 to 1 inch long.

They'll take armpit hair and will probably find enough long enough hairs to test. You will probably test positive for Pot. Since it sounds like for half the testing period you were a habitual user.