Take a look at your own info on plant physiology, etc. If what your plant needs is already in the soil/medium adding more of the same does nothing! they can and will, take in only what they need, in the amounts they need, which is also why running highEC/PPM in hydro is a waste also unless you go a long time between res changes. People have the idea you can force feed plants...nope, can't be done! The mechanisms in the root system that transports nutrients into, and H+ ( Hydrogen ) and OH- ( hydroxyl ) ions out. these ions are traded for NPK, etc, ions. so osmosis transports water and active transport for nutrient ions.
Secondly, people worry alot about getting hermie plants, well adding anything with plant growth hormones greatly increases the risk, in fact, most of those hormones have been banned. If your using a good nutrient to begin with, there is no logical reason to use all the added crap they sell. Not once have I seen a scientifically done test grow that proves they work. and this is definitely a case where anecdotal 'evidence" does nothing to prove it either.