There prob is a pH prob going on.

But if not...

Do the plants look like this?
Slevinkal Reviewed by Slevinkal on . the tops of my plants are wilting help please my plants are 3 feet tall and just started the 12/12 light cycle one week ago i started the light cycle with 36 hours off and then on to 12/12 and i noticed that the tops of the plants turning a some what yellow/green i thought it might be the nuetreints witch i chaned to a transition bud mix less strengh than agressive bloom mix and 3 days later my tops are all wilting why help please Rating: 5