Leaves dying week 6 flower

an imbalance for sure... maybe you ddropped N off a bit too much? But, like i said in previous question, it's not quite progressing where it should be (bottom-up on plant) -- too much is up top. Shedding a few leaves buried at bottom is no big deal, but if it progresses beyond that, it is something that can be fixed. think i also mentione,d the unusual symptoms at top are alos the tallest cola.. might just be getting a hair too much light in that location. nutrients in leaves can't keep up with rate of photosynthesis in that location. nitrogen will be trucked in, but also not keeping up. you shoudln't drop N to "zero" .. this is where more info can help... fertilization is about the culmination of all you've done and not just what's been done recently. whatever ratio that fertilizer is.. it's just not good enough. when it's only 1 or 2 products it's tough to mix/match to get the right ratio - limited options. i like having N provided mostly from 1 product that way it can be easily reduced without changing levels of the other nutrients. Boosting p and k in flower is fine as long as you don't feed it too much early on, otherwise you end up with p and k tox. There's no simple answer with the info given... pick a path, don't over-do it and see whathappens. revert and try again if it doesn't slow progression or reverse it. it can take time to see results. if you react by doing multuple things, you'll never learn the cause and effect.

Try to re-read my last answer... Shouln,t ignore it before, but meh... That was ur choice T_T

Same thing with me right now with one of my indoor tents. I'm just entering week 7. I think its normal. Just the plant using up nutrients it already has to put all its got left into flowering. Last 4 weeks of flower I incrementally back off the nutrients. looks like your starting to hit the sweet spot between too much and too little nutrients. its better to go slightly less than too much. That's why i like doing most of my inputs organically and adding bio char and stuff it adds a bit of a buffer and prevents burning. i mainly add just a touch of cal mag to my water and kelp it helps to ph my alkaline water down to 6.5 and supplements what my plants are taking out of the soil because i reuse my soil.