The is an acquaintance of mine who has this plant, ph 6.5, running gh one part veg nutrient and like cal mag. I really to some kind of nutrient issue none of the other plants have the issue same soil, same water, same nutrients.
Did he spray them with anything? Has he checked the leaf undersides for pests? Some of that (not all) almost looks like pest damage but it’s really hard to tell from the photo. Like those little streaky lines almost look like thrip damage (circled in black in my screen shot below). But the fading and splotchy pattern on the leaves looks like something else.
I do see a few dried up white spots that look like residue from a foliar spray or it could just be drops of water that fell on the leaves when watering.
I’ve seen weird leaf damage from different foliar sprays.
Like this appeared the day after spraying with spinosad
It almost looks like something affecting the chlorophyll in the leaf or something.
Does anything wipe off if he wipes the leaves with a wet finger or paper towel? That leaf in the background on the right side of the photo almost looks kind of white to me (near the right edge of the photo)
If it were me, I’d be checking for any pathogen (pest, fungi, etc). Or a root issue (damage or pathogen).
I’d also probably think about just discarding that plant so it doesn’t spread (if it even is a pathogen).
if you are 100% sure there are no bugs, and this is the only plant doing it, i would assume its a chlorophyll thing. almost variegated? not producing the green correctly at the very least. if you rule out everything else that is
@Rubixone Hope you are doing well … I have seen a lot of stress cause this sort of condition. In my experience, it was usually shortly after cloning and transferring to Veg. I attributed this to a highly stressful rooting and possibly rushing to veg before it was ready for stronger nutrition. In my experience within the next set or two of leaves, things corrected 100%. Really need more info on feeding regiment watering procedure and environmental conditions. Would be helpful To know the age of the plant and any transplanting, etc. Was this plant looking like this straight from clone? In my experience, these conditions normally grow out To be a healthy plant in short order as long as the stresses are removed . If you can get answers to any of these questions, we can probably get more in depth with you on possible causes, and solutions. Cheers Bud !!!
I get those from time to time. Often sorts itself once feeding full strength for me. Never worried me. But just so happens i read something recently about this exact thing while researching something else.
Its too much unmetabolized calcium, some plants have a genetic predisposition for it.
Pushing magnesium will antagonize calcium and encourage normal growth to return.
Piffcat posted the full genetic explanation somewhere.
Chandrika:
The variegation comes with elevated calcium and potassium. Youre looking at unmetabolized calcium in the presence of potassium, blocking the movement of boron, which will shift the fatty acid profile of the plant.
Piff_cat:
this may be true on a micro nutrients level as the cause, but it skips the question of why the plant is unable to properly metabolize the micronutrients. and this is almost always due to a genetic abnormality most often in the mitochondrial dna but it could also be aneuploidity in one of the cell tissues. many times plants from extreme enviorments will have mitotic or meiotic issues which lead to non disjunction or unreduced 2n gametes. these abnormalities set off a gene dosage chain reaction. cupped cotyledon mutation would be an example. it would also explain why the plant has 5 thc synthases(chem91) it would be interesting to look at chem91s whole genome since it is done but i doubt it is notated
all of these plants are progeny of nevils haze c male and have varying levels of the varigation which depends on how many copies of mutation present in progenitors from 1 in jack herer all the way to 3 in uptown black. ssh si the last pic and has 2 copies
(3 pics)