Quote Originally Posted by albatrossSKY
when i woke up i look at the cups and sure enough the roots have hit the sides. im gonna tape them up right now. how long do you think i should wait before transplanting those into real pots?
Kinda have to just go by feel... If you transplant too soon, the roots will be encouraged to spread and grow, which will slow down growth above ground. If you wait too long, you will get root-bound, which is not good at all. This explains it in a little more detail:

http://boards.cannabis.com/basic-gro...ency-baby.html

I like to let the roots "bunch up" a little on the bottom of the cup before I transplant.