Thank you kindly! I do not agree with a potassium deficiency, the leaves are too green for a potassium deficiency. Your leaf damage appears to either be from nutrient burn, heat stress or an evaporation problem, over watering or under watering. What are your grow area temperature and humidity levels? Your leaves also show low humidity levels or an evaporation problem. Were the damaged leaves directly in front of a fan? Is the soil still moist or dry when you water again? Place your finger 1"-2" into the soil and feel how moist the soil is.
amazing.... ok well lets rule out potass then.. lol me and my newbie eyes.. lol
current cab temps are 74ish with lights off and 79-82 with lights on
current cab RH 40-55 all day every day.. it ranges with weather outside as well. like right now it's raining in my neck of the woods so it's alittle high at around 55.. normally tho it's in the low 50's to high 40's...
now evaporation problem, can you elaborate on this.. i've not read or really heard about that..
regarding the soil and moister, when i water i PH a 1/2 gallon at 6.5 with my drops..
then i water
then i take the runoff, ph that, and then adjust my 2nd 1/2 gallon to get the run off at be at 6.5. with out having an accurate soil PH tester, it's been hard to know what my soil is.. it's been running around 6-7ish..
once i water, then she seems to be good and heavy for around 6-7 days.. i have been trying to stay away from the "finger the soil" trick as i feel thats pretty inaccurate. this soil doesn't have alot of perlite in it so it seems pretty moist all the time.
Now with the plant and the fan situation, yes and no.. i have the fans kinda close to the tops, where the heat from the lights build up.. thats where it's blowing on. but before she went into the flower cab, it was open during the day. now in the flower box it's closed up.. I've been monitoring the heat and it's not getting that hot in there.. maybe peaking at 82 then it drops to 80.. then peaking again.. i'm not sure why it's doing that, other then maybe when my a/c kicks on it drops...
i'm not really seeing it as a major issue, as you can see in the pics, the new growth is coming in green and lush.. maybe it was heat stress for a short period of time so it only effected a handful of leaves and then stopped..
Thanks again for the help.. hope these answers can provide a clearer picture...
~PG