So I started with 3 saplings, cotyledons are fine but the first set of serrated leaves on one of my saplings went yellow/brown and died off (started at tip and spread though the leaf), it is now happening to one of the leaves on the other sapling. My healthiest sapling has some small yellow marks on it's leaves but it's not spread. coco coir/pearlite 50/50 Indoors Sensi Skunk 2 week old ish 600w HPS (not directly under 1.5m distance) 1/4 cup tapwater every time the soil is dry at top no nutes ph 7 27 degC about 0.75 pint pot (3 saplings)
Well if you had done ANY reading you would know not to put three plants in one planter or in a container that light can penetrate .