Transplanting into larger pot

I am not using nutes yet, I was told that there was enough in the soil for the first 20 days. It doesn't seem to be hurting the girls, they are growing like weeds. Get it....growing like weeds...:P I just put them in these pots a week ago from the solo cup...I guess I should of just transplanted in the final pot.

Depends on the height of your pot, she first shoots the roots to the bottom of the pot, then spreads them to fill the pot as she searches for nutes, if the soil is too light and you dont supplement with nutes you need to transplant sooner than if the soil is nutritive or if its not but you supplement with nutrients, as long as she doesn't start to appear unhealty for no reason at all then everything is good, if she starts to get root bound then its time to transplant, so far she looks good.