I guess this is gonna be my first post here, but I've been growing weed for 13 years, and have been hanging out long on another forum, where HB grows were practically invented or at least perfected with a formula.
I'm basically a LOS outdoor grower, but I found HB principles going hand in hand with organics. I'm just gonna scratch the surface here, you know uncovering the basics, but you can always ask me for some more details, and I'll answer them if I can.
High Brix as measured with a refractometer correspond with high levels of carbohydrates produced by a plant (every plant really, even grass). It's been widely accepted that we're entering HB territory if we get 12+ Brix, and then we make it even better by getting 16+ Brix.
High Brix in cannabis is achieved by upping calcium/magnesium levels (they are always correleated) and lowering potassium/phosphorus in soil mix. With this comes work done by mycorrhizae and bacteria, which thrive in such a medium and have perfect conditions to multiply.
Another assumption in HB grows is keeping organic matter content at a minimum, roughly at 10-20% of total weight. It's also about using drenches, foliar sprays, and mineral additives, that create a perfect balance of nutrients in soil.
What it does it pushes terpenes production to the maximum, and also up THC production, makes the buds heavier (due to calcium content), and results in a very sparkly/mineral, clean and absolutely flavorful smoke that is almost addictive