To much fertalizer would be my guess. If you have time released IN the soil , plus your feeding them . As well, you are using peat based soil ? Is it buffered for proper soil pH , as peat is generaly very low ph.
jessejames12345 Reviewed by jessejames12345 on . HELP! Yellowing of leaves after repot in flowering stage. I'm a newbie and have 11 females 18 days in the flowering stage. 7 days ago, I replanted to bigger 8inch pots using peet based soil with time released nutes built in. My more experienced bro put some nutes after the repot (thrive alive B1, More Bloom, Earth Juice Bloom and Alaska Bloom) not sure of the amount given. A day after repot the leaves started to yellow on mid section and lower section. A few plants started to have black spots and appears to be drying. I was using 400hps with a Rating: 5