I had that problem last time I tried an indoor crop.... took it outside for a while and it was noticeably bigger the next day, had new leaves popping out in another day. Think it was something to do with not getting enough fresh air. *shrugs*
Alright, living in TN there's not much to do other than smoke. Did guerilla growing for a few years until I got snakebit walking to my crop and barely got to the hospital in time. Got a little gunshy after that, so I haven't tried growing the last 2 years. Wasn't planning on doing it this year...