[OregonBorn]

After that is said and done, the potency and stability of weed does not stay static after it is dried and cured. No no no... it keeps changing as it ages. THC degrades over time, about 10% the first year, and 7% the next. THC degrades partly into CBN. Now, in old books the understanding was that only THC was psychoactive. That is not true. THCV and CBN area also psychoactive, but in different ways than THC. THCV will delay the THC high, and it will also jack you up like amphetamine, and CBN will put you to sleep like a sedative. Last I looked, there were over 150 cannabiniods that they have found in Cannabis. Many of them are psychoactive, or active in other ways in the human body.

As for terpenes, they are hydrocarbons and based on the molecular 'unit' isoprene (C5H8). Terpenes are multiples of isoprene in chains. The plant stitches chains of activated forms of isoprenes together, and from them they produce an entire array of smells, depending on the number of isoprene units there are and the way that they are put together. Cannabis has adapted to produce a wide array of terpenes, and as a result can mimic pretty much anything that we can smell or taste. Cannabis produces a wide array of terpenes (the count was over 500 the last time I looked), which include limoline, linalool, pineine, etc. These terpenes (and terpenoids) are what make up the 'essentials' in essential oils. Terpenoids (or isoprenoids) are typically the oxides of terpenes (but they can be other molecular configurations).

[OregonBorn]

So in the end, the vast number of different cannabinoids and terpenes and terpenoids (which can also be psychoactive), results in the vast array of so many different highs from different strains of weed. The way that weed is cured (if it is cured at all, lots of people drink THCa tea from fresh weed), and the length of time that the weed has been cured also affect the resulting high.

For an example of the effects of harvesting and curing: Lebanese weed has a high amount of CBD and THC (up to 1:1 in some tests). The way that weed is harvested in Lebanon is that it is cut and dried, and then stored for months in sheds. Then it is thrashed and screened to remove the trichomes from the seeds and stems. The trichomes are then pounded or pressed into souls, and the resulting hashish is packed and stored until it is sold. Once sold, it is shipped to wherever, and by the time it typically gets to its destination, it has ripened significantly. Some of the THC degrades into CBN, which is a very strong cannabinoid. So the resulting high is a combination of a high amount of THC and CBD, and a small amount of CBN. The result is a mellow drifty high that in my opinion is one of the best highs from Cannabis ever made by man.

I hope this answers some questions posted here?