How detectable is cannabis?

Well if your neighbor is growing it, it probably wouldn't be hard to smell or see! If you're talking about how detectable THC is in respect to a urinalysis then that varies depending on your body weight, metabolism, and a variety or other biological factors. typically, if you're not a regular smoker and you burn a joint with one of your buddies, it's safe to say it'll be gone in 10 days. However, if you're a heavy smoker (every day to every other day), it CAN take up to 35 days to completely clean out your urinary system. As far as an intravenous (blood) test goes, that can take a little longer (45-90 days). Hair follicle tests are ridiculously effective and can trace tiny amounts of THC for up to, I believe, 8-9 months.