An N of 4 and a P of 20? Even if he's supping the N with Ca(NO3)2 at what, 15 - 16 % N that comes out to about 20-20-36 right? He still would have to use a 1/4 dose to be in ratio for cannabis - right?
I mean, I wish people could understand to post the ratio they actually apply......While the N does balance out the higher P, personally, I don't care for that high a P and using N to correct it. (high N showing in plants?)
On a related note: I've been playing with differing ratio's in my quest to answer personal questions on the no ambering front.....I basically only find average to longer bloom times for the differing ratio's I've feed.... This is also part of the reason for running some synthetic feed plants again.......As far as I can conclude. I'm affecting the plants production of ethylene gas and that's what giving me longer blooms....Sometimes that makes for a pretty looking bud. Not enough to run that way!
Anyway....I get your point Med.!