You could be getting alot of different answers here, my friend. If it were me, I would wait until you have a decent amount of nice healthy white roots sticking out of the tockwool. You dont really want Medusa, but you'll get a feel for it. Dont be afraid to take the next step if it feels like you should, some of these things are scary but after your first grow, you'll probably have learned more from experience than you have through us farmers. You'll mess something up, either fix it, or not, and next time you'll say
'No way in hell am I gonna try that again' or 'damn, I gotta make sure I do this similar next time.'
Remember, the healthier the plant, the better it will respond to transplanting. Could you take a couple pics of the bottom of the cubes/the roots, so we can see where your at?
