I used peat pots too the same thing, I just took them out of the peat pot because I don't like them and there was mold growing on mine, due to lack of space they were pretty close together. I potted them up when the growth started to slow down, I still have some in the peat pots as they are slower, so basically between 1/3 to half full of roots I moved them. I also did this because most of mine are infested with FMV and I wanted to give them a nice vegetative kick with the extra soil volume. I will have to post pictures later, they are looking a little funky right now, however they have rooted in nicely and I think will be ready to go in the summer time for a good bit of growth.