Well, I'm sure the media you're using will work well for them. But if you're going to transplant, now is the time.
Regia should only go dormant in higher temps above the upper 70s or 80 degrees F
In cooler temps is when it thrives (unless, of course, it gets to 32 or something obviously)
Are they on a windowsill? It seems they might be able to use a bit more light.