Help! I have a problem and I don't know what's causing it :( The plants are 10/18 days old. Something is wrong. I have the light set to 90% power. To keep the tent from being too cold. Could this be the reason for the yellow spots? And the slow growth of some seedlings? They've only been watered once with power roots.
light burn
ph, way too low
or excess of potash i think brings those whitish dead leaf in veg, had such case long time ago, cant recall
Something in-between those 3.
Big garden !
Happy Growing !