Yellow leaves .

[Gratto62]

Have a few critical 2.0 and all the leases starting with the larger ones are going yellow , have looked at some of the problem pictures but nothing really matches .

[Gingerbeard]

Hey Gratto! Can you start with pictures of your own? Preferably not under any sort of grow light? Auto seeds or photoperiod? How long have they been growing (vegging and or flowering?) Look at the information at the bottom of my post that tells about my seeds and light and tent and stuff.