Sampas92
Just newbin
Since i bumped everything except ca and mg they "got rid" of the purple and i got something like this, i dont think that is low S?Just lighter at the tops, where it's high ppfd
You can see the right pieces of the puzzle. Better than I have. I was unsure about the N, and I was probably wrong. It's likely the high light. Are they quite high in red? most are. Without the red peak this is less likely. Though perfectly possible. I have fell into the common misconception of a nutrient deficiency, where it's actually high light destroying the green pigments. Which is not as serious as it sounds.
Forget the calnit. It might even be bad, if the red petioles and lifted serrations are actually mild Mg signs. If it were low Mg and your source is epsom, you might also have low sulphur. It's not very likely, but sulphur can give an overall yellowing. I'm just thinking out loud here though. I have not seen them top to bottom.
High light causing mild bleaching seem quite likely. As otherwise, nothing stands out to me as worth addressing. I'm not sure how this will tie in with mold issues.
In all my newbiness i know that if we got all the parameters right to high ppfd they can grow fine even in seedlings, may not be worth but scientifically proven.
I dunno, it could be the slightly lower rh, or me droping the ec by .3/.2 points to counter act the high EC at run off and also a presumably bit of K toxicity, if because of ratios or the ammount of it per se, i dunno.
Regarding calnit, since calcium is supposedly needed for high mass growing stages, and since the worst ones are the ones still stretching a bit i think they might need it, and even if they dont get the taller tops higher, i see the side branches growing good and reaching light. I saw this hapening with cobs where the intensity is high and when the tops get to that intensity they fade, stop growing, side branches begin to grow ence bushy plants under leds. I got the same with SILS, even tho weak and not comparable to cobs or led bars, get them at 2/3cm and its the same thing.
I think i will try to bump ca a bit to see if it helps, Mg i can see them needing it with the white tips, if its a sign of it wich i also, dunno.
Again in all my newbiness i point my finger to high ec at run off (2+) giving them somekind of lockout maybe by osmotic pressure (or how its called) because of the drying coco, wich dries and kills some roots that may or not be responsible for the newer growth but again, in all my newbiness, wniping lower branches or leafs would get those respective roots "free" to deal with new growth (i guess), or is just the lowet rh.
Dunno, i will make a new batch today with the same feed and add Atazyme to see if the run off lowers a bit, if the run off gets lower and they get better at the same rh its it. If not, i can only hope that someone could know what it is, because i cant increase the rh now, also i switched off the added fsn on the ground to see if the rh is a bit higher and see how they handle, just a few hours before lights out so it wont take long to see if it helped.
Thanks bro and come anytime you want.
Ps: i dont think its the high ppfd, with this bars for example right in the middle i have one top that is getting around 850 and does the same clawing/droopyness/curving(whatever) others too, i can understand that overall can be too much for them all, but again at some point fuether down in them the leafs look normal, so i still point to lower rh combined with everything else.
Peace