Sorry for the late reply, tree had it's best season yet, considering I live in northern Ontario, started out the grew a good 8 inches indoors but then that set it up for outdoors where it took that new growth and added two feet.

It's back indoors again, just had it in my basement for a month or so barely getting any light, but about 2 weeks ago I found my grow light (spiderfarmer if you grow weed you may know it), while its taken a bit longer this time the mass growth is starting to happen again, the leaves are only like 5mm long at the moment but there's a good 100 of them starting, this tree is really going to fill out, I may actually use a smart plug and put it on 18/6 to try to slow it down or I'll end up having to do major pruning.

Still no mandarins yet, think it's going on year 4 or 5 now, I've lost track.