Without any info, it looks like the plants are in straight worm castings with no perlite, and your lighting is insuffucient.

But if you copy and paste, then fill-out the appropriate troubleshooting form, we can likely give a better diagnosis. The link is in my signature.
Rusty Trichome Reviewed by Rusty Trichome on . HELP! Plants are under-curling and bottom leaves dying [PICS] I need some quick help to save my 2 of my outdoor plants which are doing bad recently. I have 3 growing plants outside and 2 of them have recently are almost over a spider mite attack which i have been stopping using dish washer+water solution. This issue has already caused damage to the plants, but recently i noticed that the leaves have been curling down and the bottom leaves are all starting to die. Please tell me whats wrong and what causes them to curl down and die?? My third plant, Rating: 5