Nitrogen removal during flowering

good answer by numbers. short end of it. No, don't remove completly. just lower it a bit.

Maybe, 10-20% reduction? Depends on your feeding methods and types of fertilizer used prior, too. I try to push the maximum early on, so i may need to reduce it more than others. the plant definitely needs all the nutes throughout it's life cycle.. the idea of boosting p/k in flower is a bro-science failure. research does not back up the assertions that this will incerase yield or potency... simply not true. Soil ferts are different than soilless/hydro ferts. Some of these are not plant available forms of N. this means there is a lag between when you reduce it and when that reduction actually impacts the plant - there are 'middlemen' bacteria and other microbes that break it down before it can enter the roots, which creates lag in your changes to fertilizer ratio and when that actually impacts the plant. N is not the only one potentially this way in soil ferts. depends on the ingredients used. soilless/hydro you are providing 100% plant ready/available forms of these molecules. So, there is no middleman process. Any changes to the formula and proper fertigation habits with 10% runoff will change the ratio of nutes in a substrate. almost immediately. (100% immediately in the case of hydro rez re-fill). keep it happy. avoid toxicities and deficiencies. let that determine what is best for the plant. take notes and continue to do better next time. A good formula should work on 95-99% of all pot plants. (simplified, still may need a little less of this or that at various points) Unless it is a reputable Ag company, i wouldn't trust instructions. Most marijuana branded stuff tells you to feed way too much so that you buy their trash products more often. FF does this. If their feed schedule has a tone of "flush' cycles, that's a hint they are fucking retarded, lol.