Cold water, boiling the roots, sitting in the dark for 24-48 hrs none of it does anything. Colder temps can bring out some extra color but if you have a plant that’s genetically predisposed to color it will come regardless of temp. Potential of thc is solely depends on the genetics you can achieve the most out of a plant genetically if you keep everything in optimal conditions. Topping, fimming, nets moster cropping are proven methods to increase yields. Some of us here run hundreds of plants and have more than enough experience. Also not all of us are even over 35 yet
so we’re not all old guys stuck in our ways. Most of us here have tried most everything written some even have tried dumping mtn dew in their plants claiming it increases something but doesn’t. A lot of what you read is in that category of the mtn dew grower pure, junk with zero science or real world proof.