How long does marijuana stay in your system?

I might be trying to et a job in a month or two and i want to know if the drug tests you are required to take can detect if you smoked marijuana? If i smoked just yesterday how long does it take till drug tests cannot detect that you used marijuana?

It varies but it doesn't really depend on your metabolism. It also depends on how much is in your system...If you been smoking every day for over month it will probably take you 8 weeks to get weed out your system. The more you sweat, pee, defecate (aka excretion), the less will be in your system. There for meaning prune juice, de-tox formulas, cranberry juice, teas, running with multiple layers are all great ways for getting marijuana's THC out of your system. 4 weeks should be plenty if you drink the above mentioned liquids, drink an excessive amount of water each day, and promote a lot of sweating. That's blood and urine tests. A follicle test though is tougher....shave your head that's your only real way out of that. Or most costly but simplest of all...buy a whizinator and find a clean friend.

from answers.yahoo.com