As far as I know, weed stays 3 months in Hair, more than a month in blood and something like 2 weeks in urina.
But however, it’s depends on the quantity you smoked, and its depends on the test you’ll have : the test will detect only the thing it is looking for. If you need to speed up detoxing process, read this article then https://www.ncsm.nl/english/health/detox/mega-clean
Actually, there are a lot of different factors that affect how long weed stays in your system and doesn’t depend on how much and for how long you smoke. Toxin Rid is one of the most complex and highly recommended products on the market, I used it and passed positively!)Here you could find important and useful info about a variety of detox pills and other methods for passing a drug test.
This product Zydot Ultra Clean Shampoo also very helpful for hair drug tests, I’ve read an article where you could also find info about preparation, instruction and even places where you could buy it. The shampoo actually works. I was another skeptic at first but bought it at last. The shampoo is a little bit expensive but it’s worth the money. Thanks to the Zydot Ultra Clean, I have passed my test. I am surely going to recommend others to try it out.