Hemp and marijuana are both from the same species cannabis sativa. The variety known as marijuana has traditionally been associated with the type of cannabis that people smoke to get the “high” associated with marijuana use. The marijuana variety of cannabis is high in the compound tetrahydrocannabinol (THC), which is what creates the “high”. The hemp variety is low in THC, but high in cannabidiol (CBD). The only difference between the two sources of CBD is the ratio of THC. Hemp varieties contain less than .3% THC, and often contain zero THC. Most marijuana varieties are very low in CBD, and typically not cultivated for CBD production.