It kindah depends on how regulary you use. If you don't use often then yeah deffinatly you will pass. You could pass in 3 days if you wanted.
If I Only Took One Hit Of Marijuana Can I Pass A Drug Test In 9 Days?
From what I understand a hair test will reveal all drugs for the duration of the hair. Would have to cut hair off to the point of where it was growing at time of use.