I can tell you that I was getting severely drooping leaves until I stopped using our tap water which is noticeably "hard" water.

You could have overwatered. You could also have overdone it with nutes for all I know on that so far, but if you have been using tap water only, you should get some distilled water and try that next watering/feeding, and see if that helps.
Rezinator Reviewed by Rezinator on . ARGHHHH, help Hey people, ive just got back to da grow room, bin out for a couple of hours and the leaves have started to droop in6to the soil, got no strengh in them, any ideas? Cheers. Rating: 5