a lil help here, whats this? its not bugs i dont think? some sort of nute def

its only on a few fan leaves. ive gotten it each crop, a few here, a few there, i usually just tear em off but its kinda getting annoying. i had spider mites once but i seen em and took care of em, it was only on one plant and looked dif then these. i dont think its affecting my planst too much. ive heard tripes n mites n nute defec, but still no clue.

grapefruit ice, growing in soil fox farm OF, ph 6.3-6.5 water, ppm is pretty low, temp is 85-88ish at the high end, 70's at night

Could be magnesium shortage.

Have you flushed the soil?

You may have some 'hotspot's that might be locking out the Mg

i havent really flushed too much this crop. it does seem to be a bit more this time around.

I would flush well, leave to dry out then feed with nutes.

Start off small with EC around 800-1,000.

wait. it might not be mag at all. as that starts lower middle to bottom as the top takes the chlorophyll from the bottom in order for the top. mian part of the plant to photosynthesis. all the marks are on youre veins. classic bug signs. get a mag class and check the back of the leafs. check youre soil. lets us now and we can help

please dont flush yet. do the checks for bugs. ive got to go for 20 mins and i will come stright back on and jump on here. so let me know what u find and dont flush yet

Two things pearl, 1- get the temps below 80 or get a reduced harvest 2- make sure the pots are bigger before you start the scrog next time.

i didnt flush em but im almost 100 percent theres no bugs. ive looked a million times.

Those look like injuries - either heat/light or crimp or splash from nute solution. My opinion. cn

<edit> Last image has me a bit stumped though. Otherwise, i don't think it is a deficiency or imbalance.

*BUDS said:

Two things pearl, 1- get the temps below 80 or get a reduced harvest 2- make sure the pots are bigger before you start the scrog next time.

Click to expand...

what do you mean, explain?

the pots are fine at the mo.... they aren't rootbound plants, and that isn't splash damage.

flush the soil!

same here...I've had accidental splashes on bottom leaves that resemble your spots! I think a nute lok will look more uniform than just a splotch......good luck!

op im baffled tbh.. im trying to do a iliminations processes on whats its not and maybe is. good you take a pic of all the plants unde you're screen. just want to see you're lowest fan leafs. 2nd the area youre grow is. is there any chance any bugs could be in the area around the plant. also i would get some brown bug strips and place them on youre soil. its just so many spots like that on the leafs viens. only reason why i say dont flush is there is no point till you know why youre are. as flushing should really on be a last resort when all other options fall not something we jump to in blind hope everytime we have a problem. aslo i my exp it only aggravates most problems anyway.
and can you awnser a few . when didi youre strat to feed and what ec/ppm. including additives and calmag if used and how often and how much of these to.
also anything else you might have put in youre soil anythig to help buffer it or anything like perlite ect and what ratios. as these in rare cases can cause chemical reactions and cause imbalances.

or ye there not splashes. if you good splash everytime ang on the same leaf with the same sieze splash on the veins to. you should be in the Olympics lol. also cut a piece of potato up in a small squarish piece and place i youre soil and check in a few days under a microscope. just to be safe

buds is of course correct you need bigger pots. the plant up top is always roughly equivalent to the size of the root ball. if you used bigger pots your plants would be getting bigger still.

high temps slow growth. high temps plus high humidity can cause those yellow spots. humidity is always Relative Humidity. when temps go up humidity should go down, 50% humidity at 72 degrees is perfect, 50% humidity at 85 degrees is terrible


you can rock with 80-100 degree weather if you keep the humidity low as fuck. if the humidity gets above 40% at 100 degrees or higher your plants will steam like collard greens right on their stems. i lost a fan while i was out of town, and when i got back i now have a few yellow spots like that. they will be there till the leaf drops.