I know this is an oooold post but "starving" your plant makes its "defense" kick in. And what does cannabis do to "defend" itself.. produces trichs. Am i wrong.. genuinly asking.. as for the low ppm leading up to harvest FOR TASTE AND AROMA, i couldnt speak to that cuz i havent even thought about it and after reading this, willl defffffinitely be looking into that. Makes sense. But i do also know alot of the "harshness and bad taste" has ALLOTTTT to do with the drying and curing process. Just a stoner friends input from MY experience. Everyone has their own! Happy growing!