When is the best time to rehouse a baby?

I just got my hands on a Vietnamese forest scorpion, it is still very young, body is about 2cm long. I have a 30x30x30 enclosure setup and ready for rehousing and my question is now, when is a good time to rehouse into that enclosure? the enclosure itself has a tunnel system, deep substrate, live plants and lot of space to hide, climb and so on.
How long should i wait until i can safely move her in to her new home?