I have used cocaine and marijuan only a handful of times in the past 90 days. I am not a frequent user. Will this still show up on a hair folicle drug test?

Yes, it grows with the hair strands. Test will show when you used and how long for. Its not just the hair on your head it's the hair any where on the body.

Yes it will show up

Let me give you a slightly different opinion that contains both good and bad news. Bad news first. The cocaine will probably show up. This is due to ionic bonding of the drug to melanin, the pigment in hair that determines hair color. Hair is therefore an excellent matrix for detecting cocaine.

THC-COOH, the metabolite of cannabis, on the other hand is not strongly bound to melanin and light or infrequent usage is generally not detected in hair.