One of my two plants looks sick with yellow/brown leaves and getting worse.
They're both the same strain and have been getting the same watering. I can't get to figure out what's wrong.
Some details:
Strain: Green Gelato Autoflower from Royal Queen Seeds
Soil: BioBizz Light Mix
Lights: HLG260 V2. LEDs (24" distance from canopy)
Been feeding with just tap water left overnight and 6.2 ~ PH.
Temps and Humidity have been on the safe level, using an exhaust fan and passive intake since sprout
I was thinking on lack of nitrogen or CalMag. But, since only one plant is yellowing with brown spots, could it be a bad seed?