Under LED grow lights (white not blurple) leaves on some plants look yellow-ish between the veins especially the newer growth. Under warm-spectrum room lighting they look fine colorwise.
Still I’m suspecting a possible magnesium deficiency because of some purple stems and some lower leaves have a few dried spots / tips.
Might yellowing show first under LED?
I was hoping that an extra shot of cal-mag next feed and possibly pH-ing the runoff would be enough care. I don’t want to overreact at this stage. Am I under-reacting? Time for flush?
White Widow autos
Coco and perlite
General Hydroponics Flora trio w/ Cal-Mag
About half way through week six and in flower.