Nice!
What growing medium are you using under the rock?
What kind of lighting are you moving it into? Should house lighting be sufficient for growth, since fruiting isn't the goal in bonsai? I really want to try this with my Giant Bhut plant that is almost a year old.
I want to see some pics of your grow room please!Currently I have it in my southern facing window, but If it appears to be struggling, I'll move it into my grow room. I have two 1000W HPS bulbs running in that room for my hydro plants. That should be more than adequate should it get to that point.
I want to see some pics of your grow room please!