Depends on where you get your info. I was just pasting something I found on a web page. It turns out that the Wikipedia entry has changed and the latest is this:

G-13 is the codename for a strain of marijuana, supposedly a mutant variety cultivated by the American government during the 1960s. According to urban legend, the CIA, FBI, and other agencies procured the best strains of marijuana from breeders all over the world. At a secret installation in Mississippi, they bred many new hybrids. Putting these together, they created a strain that was more powerfully intoxicating than any of the original hybrids. This strain, G-13, was a primarily indica phenotype strain and provided a very potent smoke and a completely mellow high. Allegedly a single cutting of this potent strain was stolen by an employee at this government facility and released into the public domain.

Other rumors say G-13 was developed by the University of Washington's cannabis testing facility for medical testing during the 1970s, but this, too, has not been quantified.

The name G-13 is said to derive from the term Government Marijuana, the 13 used as M is the thirteenth letter of the alphabet.

Apocryphally, G-13 contains 28% THC by weight, about double the average percentage in most high-grade sensemilla grown commercially. It has been claimed that some strains of marijuana grown in Amsterdam have met or surpassed this percentage, but accurate, verified results have not been produced.


I just wanted to post something about G-13 which I decided to look up since I'm not an expert and don't pretend to be (hint hint). Whether there is any weed stronger now than there was 30 years ago is another question and I think once again it depends on where you get your information.


Also from Wikipedia:

New breeding and cultivation techniques

With advances in breeding and cultivation techniques, the diversity, quality and potency of cannabis strains has been slowly increasing over the last 20 years, and these strains are now widely smoked all over the world. These advances- the sinsemilla technique, breeding, seed banks, hydroponics, cloning, lighting techniques, sea of green, etcâ?? have been in part a response to prohibition enforcement efforts which have made outdoor cultivation more risky, and so efficient indoor cultivation more critical.


It seems like growers think they are increasing potency with all their indoor tricks.