Your best bet is to bleach and dye your hair. You don't say the length of your hair but every half inch is about 30 days. You can try your plan, I'm just telling you your best bet.

You can goggle "Jerry G and drug tests" and that will take you too a site where brother Jerry hangs out. Jerry is the king of passing hair tests and comes through here once in awhile but all the reading you need is goggling "Jerry G and drug tests". Spend a couple hours reading his posts and you will know everything you need to pass...:thumbsup: