And there is even more:
The taste of cannabis comes mainly from essential oil in the trichomes; the juice on the other hand is water from within the plant tissue.
Sure, a healthy grown plant will have more nutrients and more primary metabolites (the latter are often the main goal of agricultural crops) and obviously a cannabis plant which thrives will also result in good healt and therefore a nice harvest. But we are interested in secondary metabolites, more precisely resin. Its production (BTW in many aromatic spices too) is often coupled to defense mechanisms and therefore increased under 'stress', that may be intense light exposure, temperature extremes, predators, shortage in available nutrients, drought etc. and that is exactly what growers do to their plants during the final weeks of the season (and also before).
OK, drought for example will result in drier plant matter and hence a concentrated sap -> °Bx rises and coincides maybe with a better harvest (if the plant doesn't get killed by the process). That's also what winemakers do with noble rot and when making straw wine or ice wine (they speak of the oechsle scale in that case) .
Good question .The stress thing works to a certain extent...the question I am struggling with is if it is not maybe better to provide the plant with enough energy to make more fat which could then be converted into essential oils.
I have been told this is being done in mint production with outstanding results.
Do you have an opinion?
There are literally hundreds of thousands of secondary metabolites and only some derive from fatty acids .Lipids are the key fat for secondary metabolites according to my notes!!
But I only understand half of what I read????
I have yet to see good application of Brix monitoring in relation to cannabis growing. We just aren't there yet.
Also it seems to me phospholipids are key to the prevention of things like PM which feed on pectins. It is my understanding ... that a phosphopipid layer covers a Ca Pectate layer on the leaf...the thicker that pl layer the less likely the mold can reach its food source.
....
My opinion is brix is a single measurement that taken alone does not mean all that much. Taken in a broader context it is a guide to how healthy your plant is.
Higher brix is higher quality in wine? Uh...sorry, but no.
Winemakers may let grapes get pretty sweet to make sure the tannins and phenolics are full developed, but no one wants to add water to the tank if you don't have to.
There comes a point where the sugar is too high for the yeast to complete fermentation and this isn't good most of the time. The left over sugar is food for stuff that can cause major problems.
There are super sweet grapes left hanging for late harvest wines, but the generalization of sweeter is better is stupid.
BTW, I live in Norcal, and have done wine chemistry since '97