Banana Daddy R1 / Organic soil growing

i had same look after overdrying them and using wrong ph. would check those two points. easy way - transplanting into bigger pot, giving humidity dome and good watering regime. chlorinated water sometimes can bring the same result, but it takes a month or so, so not this case i would say.

I've had exactly the same kind of marking on young leaves and it turns out I had given a little too much fertilizer a little too early... it wasn't much of a problem and once I had backed off on the nutes a bit, the newer leaves were just fine. I think that might be your problem as well - so I'd suggest just back off a little bit on the doseage for the next week - maybe cut it in half for her ... if the others are not showing the same thing, then THEY are able to tolerate that doseage... different plants, even from the same strain and same seed bank, will often require different treatment - identical twins aren't exactly identical! Good luck and enjoy the journey!

definitely overfed, but also check your pH -- they both are potentially correct. If pH is off and it's only slightlay overfed, could be a micronute lockout, which is rare issue and more likely caused by pH. More than 1 thing causes those sorts of spots. Download a leaf symptom chart from a google image search. Learn differences between mobile and immobile nutes and how you can use that to distinguish between some things that look the same otherwise. Extremely lush leaves are a sign of overfeeding. Clawing tends to occur with it too. Seeing previous question, looks like pH has been an issue in past... so just double check that - soil slurry or runoff... Don't expect those to be precise, but if they are leaning one way or another expect it to be a little further out in that direction from "7". If you do a slurry, always use same volume of water and a known/consistent pH, otherwise you'll be interpretting different results caused by the inconsistencies as much as anything we are concerned about.

They look a little underfed and or the ph may be off a little. If they were overfed, alot of your pistols would have browned already.

Hey Growmie, You are definitely right this is going to be a phosphorus deficiency, to fix this issue flush your plant with clean, pH’d water that contains nutrients that includes phosphorus, for your regiment it seems your Bio PK 5-8 is your source of phosphorus. This will also remove any nutrient salts that may be affecting the uptake of phosphorus and help restore pH to the proper levels.