I got this info from years and years of growing plants and paying attention to what they are fed. Also from individually upping and lowering specific macros on feeds per room with the same strain only changing 1 macro at a time in the last 2 years in the same rooms. This also might be different with soil vs soil-less. Those are 2 different animals. There isnt a 1 size fits all to a statement like that. Same can be said for what I said. I used to be on board with that statement and always grew the way of no to little N in flower. Same thing with veg vs flower nutes or running different schedules.
This all changed in 2012 when Chris from Hydroponic Research came around here talking about
veg + bloom. Was skeptical about their claims and went back and forth in emails a couple times with him. From everything I knew over the years and chasing the best schedule with bottled nutes I though there was no way the claims were true.
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Using this 1 formula for veg and flower (this was when they had the 1 nute no boosters just strait base with a cheap computer printed label) when it had high N in it would never work. After 1 run everything I thought I knew was flipped upside down on its head (was using CNS-17 prior to that). I remember a group of dudes running T.A.G. grows (True Aero Growing) and them breaking down why they all used Dutch Master Gold nutes because of specific ppm targets they were hitting and it was so over my head at the time.
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That started me down the journey of running stuff like 3 part after getting off V+B (cause of the price) and to start going down the road of alternate schedules that people have used over the years to compare results while breaking down the ppm of macros/micros and comparing the effects of the end products yield/flav/look using the same clone. I had just been following the heard and going off what the pack says and never put real thought or testing into it. This lead me to where I am now and tweaking my own feed to suit my needs and style. 100ppm + of N all the way to flush in flower. In fact more N in flower then I run in veg.
Now if you were looking for scientific published papers and leaf analysis from a lab that is something I don't have. Just going off my personal experience and what I have seen and tasted with my own eyes, mouth and scales. So take that for what it is. This isnt about tooting my own horn. This is just about putting info out there to help other people. Something you are always trying to do which I love to see. I learned over the years with all the bad info out there and just trying to pay it forward from all the dudes that actually were dropping knowledge over the years but I was a younger grower and man and had too much ego to listen.
After 18 years of doing this I realized I had no clue what I was really doing when it came to nutes. Spent a good 6 months reading on specific elements and their roles and sources. Then spent a good amount of time breaking down all the PPM's of specific elements of commercial bottled nutes that I had run over the years to see why the ones I liked and had good success with worked the way they did. Found that most of my success came from running N in flower even though I always thought I wasn't. All of that was from Coco/Hydroton/Silica Rocks/Perlite grows until rockwool a couple of years ago so the control of what you are feeding has way more of an impact and you can def say if less or more of 1 specific thing has a positive or negative effect. Again amended soil is a totally different animal and none of this may apply to it since I don't run soil and have very little experience in that dept. Which goes back to what I said. Feeding N in flower does not make your weed taste grassy. Which is why I said that is false*. Maybe I should have said it's false from my own experience instead of a definitive statement like the one above. I'll admit that.