The way he explained it to me was that the percentage of, lets say, THC per gram is a direct relationship between the surface area, density, and the overall amount of THC on that given area. For example, a gram of super dense bud may have a THC content of 150mg/g of bud (about 15%) with the hardeners and finishers. He said that without the hardeners/finishers he has seen the number go up closer to 20% on the same exact strain. This is because, even though there may be slightly smaller buds, those buds have a higher concentration of THC.
Anybody notice this? I think im gonna try my next grow without that shit