Need some more info bro.

Have you fed them? If so, how often, how much, what kind, what are the specs (the 3 numbers on the bottle of fert)? What kind of soil are you using?

To me, it looks a little overwatered judging by the drooping. I also notice a few burnt leaves, perhaps overfeeding? I would say underfeeding, but their is one leaf there that appears to be burnt from the tip up, over the entire leaf.

How moist is your soil? How often do you water? What kind of lights are they under and what are the times?

Details man, details.