i just started 3 plants that havent even surfaced yet should i leave the lights on 24 hours and if so for how long
The lights don't need to be on if they haven't broken through yet. But when they do break through turn em on and either run a 24/0 or 18/6 cycle. ~Worm
No it's not bad. Just not necessary. They're not going to utilize the light until they break through.