G13 Cannabis Strain HighlightsG13 is a very strong weed strain of indica that is the subject of many urban legends. According to some accounts, the CIA, FBI, and other agencies gathered the best strains of weed from growers all over the world and created the G13 weed strain. At a super-secret location at the University of Mississippi, they bred many new super hybrids marijuana in the late 1960s. Allegedly, a single seed of this plant was liberated by an unnamed technician and bred for the masses. Even though the legends are probably not true, G13 delivers effects like no other. If you have the opportunity, definitely try this strain. Despite its confusing origin,it is necessary to try this strain because of its potency of 24% THC level.