how long does it take for weed to leave your system
Also, it stays in your system for much longer periods of time than any other illegal drug. On average the weed will be stay in your system between a week and thirty day. However, in some extreme cases thc has been detectable in the body (urine and blood) for up to 180 days.For a hair drug test marijuana can stay detectable forever until that hair is cut.lso, it stays in your system for much longer periods of time than any other illegal drug. On average the weed will be stay in your system between a week and thirty day. However, in some extreme cases thc has been detectable in the body (urine and blood) for up to 180 days.