It's with nothing though that there are natural PGRs that are totally safe to use and don't alter the amount of THC or have any adverse effects.
Things like kelp (macronutrients) fulvic acid, auxin, gibberellin (GA), cytokinin, ethylene, and abscisic acid (ABA), coconut water (has a few of the above naturally occurring in it) etc...
There are a lot of strains that *look* like they've had PGRs used to grow them but are as dense as that naturally and have had hard manicures to look homogenous and 'neat'.
At the end of the day it's what sells and pretty weed and (to me) weird terpine profiles are all the rage with these fucking 'cali' starins and 'flavours' that mostly younger people are hyping about.