black leaves

Hello, I transferred my plant to 12/12 cycle 5 days ago, but my leaves are starting to become weak and have black spots, please help me??

First outside grow and would really appreciate any advice. Plants are seemingly healthy and well into veg state. Being my first time I tried super cropping a few times and split several stems in the learning process which have since healed... some with large dried opennings still. I have also...

Hey guys, I'm currently doing my first grow using rockwool 6'' cubes x5, Using a 5 gallon pot as a reservoir, feeding every 3 hours, about 8 cups each plant and not to waste. The nutrient breakdown is Big Bud( first 2-4 weeks flower) Calimag (when not using big bud), FloraMicro, FloraGrow, and...