Fungi, nutes lockout or cal-mag def ?

Hey guys ,

Second time this shit happened to me , so there are some brown rust spots that appears on the newer leaves , older leaves are not affected at all :





so what is this ?

Thanks !

looks like cal deficient

stoned-monkey said:

looks like cal deficient

Click to expand...

Cal starts on the lower leaves first but who knows could be. Looks like it.

jtrizzy said:

Cal starts on the lower leaves first but who knows could be. Looks like it.

Click to expand...

no it starts at the top. calcium is an immobile nutrient.
references:
https://www.sensigarden.com/calcium-deficiency-marijuana/
https://www.growweedeasy.com/calcium-deficiency-cannabis
https://www.royalqueenseeds.com/blog-calcium-deficiency-in-cannabis-plants-n602

about nute mobility
https://nrcca.cals.cornell.edu/soilFertilityCA/CA1/CA1_print.html

alexanderabinson said:

Hey guys ,

Second time this shit happened to me , so there are some brown rust spots that appears on the newer leaves , older leaves are not affected at all :

so what is this ?

Thanks !

Click to expand...

How about more details to ascertain why you have a calcium deficiency

Thanks for the answers guys , it was an overfeed or salt accumulation , checked the runout , it was close to 5.4 , way too acidic for soil , i gave her ph 7 water for few days now it's back to normal , no more progression of the shit , but i'm close to harvest now .