Original Skunk and Northern Lights from the late eighties tested around 8 to 12 percent, which counted as strong at the time. Decades of selective breeding pushed the average for modern THC seeds into the high teens and the top lines past 25, mostly by stacking parents that already leaned that way. The timeline on https://potentthcseeds.com tracks this rise decade by decade, and it is a good read for anyone who thinks modern numbers are hype. Some of the jump is better testing, but most of it is real.
