Brown weed is old, and not grown well! People near Canada or near California probably have no idea, but this nasty brick weed is common in a lot of areas. Its usually really cheap, and sometimes it can get you really high. Most of the time it gives you a headache, and it makes you really tired. I got some mexican brick weed from L.A. county that was fresh and green, and got me really high. By the time it makes it to the midwest and east coast, its been sitting around for a while. (I am guessing 1-4 years. it would be interesting to know for sure) Since people transport and store it in such quantity, its often stored with no regards to preservation of THC. Often in August and September, before the yearly harvest, things run really dry on good stuff, and we in the midwest are forced to buy the mexican crap. Its quality varies. Usually best rolled up, a vaporizer works great for regs too.