gREEn7o0answered grow question a day ago Improving quality is in my opinion 3 things:
1) Genetics - doesn't matter how good you do, if the genetics of the plant aren't quality, the results will not be either.
2) Environment - Get your environment dialed in. Temperatures, light intensity, and air flow are critical in producing a quality plant, and each plant may want something slightly different, adjust until you find what the plant thrives in. They don't all love the same environment.
3) Dialing in nutrients to the plants. Getting your nutrients dialed in also helps the plant put its best foot forward and helps it achieve top quality. Its more about ensuring your plant is never deficient, it always has what it wants and needs without going too far and locking it out with excess or bad ratios.
At least until the end of its life, then depending on who you ask, stressing the plant can help it push itself a bit further. (Cold temps, flushing, ice flushing, extra dark time before harvest day, and a million other things dudes will tell you will increase potency, terps, smoke quality etc.. gotta try them for yourself and see if you think they make a difference or if they are bro science)
I will say when I ran some shit with organic nutrients (worm shit, gaia, and some molasses teas) along with synthetic nutrients it was one of the best smelling crops I have chopped down.
That's my 2 cents.