Folhas queimadas no centro (Ajuda)

UV has offered no solutions, only mostly copy and pasted AI garbage as usual. Lack of potassium is one issue......the burning is most likely due to a salt build up due to not getting sufficient run off each and every time you irrigate. Not sure if bottled mineral water is ideal for plants..........lots of dissolved salts. Bokashi and guano is not a balanced diet either. Anyway, you are not going to smoke the leaves anyhow...........so This issue has been manifesting itself for at least 3-4 weeks already and it is too late to "fix" anything now before harvest maturity. Next grow, invest in some proper cannabis specific fertilizers........there are many, many organic ones to chose from if you like to keep things natural.

Yeah xD My untrained eye says that's he's on 4rd week of phosphorus window (The core consuming time for the plant) and that's they're eating itself up like more then they should man claims that there is more 4 weeks at least SO i'm strongly disagree with Ultraviolet also this isb't 1-st time that i think ur wrong, ur a pretty wise and smart man but we can't be right all the time xD let's see some other answers

For cannabis, senescence (the natural aging process) begins approximately two weeks into the flowering phase, understanding what that means, how is it triggered through nutrient deprivation and how similar it looks to several nutrient deficiencies to the untrained eye. Nitrogen itself is difficult to decompose especially during the dry and cure, in a perfect world we want to trigger nutrient recycling within the plant. This will begin to recycle all the nitrogen within the plant and begin to store it all in the stems and back into the soil (given there is space). The carbon-to-nitrogen (C:N) ratio is a critical factor in triggering nutrient recycling, particularly in soil. Nutrient deprivation, whether due to cellular starvation or environmental factors, generally triggers nutrient recycling mechanisms like autophagy in cells and broader nutrient cycles. Looks like senescence in a colder environment than anything else. Tips look damaged too, high ec but hmmm... Microorganisms create electrical conductivity (EC) in soil independently of plants. If you have been adding alot of sucrose to your medium recently it could have put the carbon nitrogen ratio to the required 24:1 for triggering. 40% of the carbon your plant captures is turned into sugars and fed out the rootzones to feed microorganisms, as these micros feed they release co2 into the soil. Co2 is 1 carbon and 2 oxygen molecules. The more carbon you have trapped in your medium the higher its moisture retention. As flower progresses, this can change how you much you need to water, applying the same old amount of water normally causes oversaturation to slowly creep in, closely followed by anerobic fermentation, from there it's just all radicals and acids.

severe N,P deficiency (those 2 work like a couple) seems to me ur underfiding so it also could be deficiences Ca (these bleach spots),Mg,K and else that's hard to see