Brown spotting on fan leaves

Trauma687

Member
Hey everyone, i took a quick look through the stickies to see if this was there but couldn't match it specifically.

Heres the details.
Master Kush, Outdoors, 3 Gallon Pots, using some Organic potting soil i picked up at home depot. Been watering every few days, every couple waterings im using a half cap of miracle grow liquid fert mixed with a gallon of water.
Anyways, i just went and checked and one plant has a few leaves with this very light brown spotting. I wasn't sure if its due to weather (Been rainless for a week and a half and very sunny) or if my soil pH is screwed up/nutrient deficiency/overabundance.
Heres a pic of part of the fan leaf i pulled off. Sorry for the low quality.


Any help would be appreciated.
 
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