First time Auto flower grower.
Seedsman Northern Light Auto flower
Canna coco coir with perlite
3 gallon plastic pot
4x4 tent under 2 600w LEDS at a height of 28inches
Humidity 60%
Temp 73°-79°
Plant is showing these spots and discoloration. First feeding was on friday 30Aug. I used 2ML per gallon of calmag and 1.5 ML of Fox Farm Grow Big per gallon. I used 1 gallon to feed my 3 other autos which are 2 Moby Dick XXL and 1 Pineapple Glue. I made sure not to wet the leaves with the nutes. The only plant showing these is the NL. Thanks in advance for any advice given.
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What do you adjust the pH of the nutrient solution to prior to feeding? Also, what has been the PPM of your runoff?