I have a HUGE Christmas cactus that is in desperate need of transplanting and/or separating into smaller plants. This plant belonged to my fiance's grandmother and from what he has told me, it has been in the same pot for YEARS. It does produce a couple of blooms in the winter. It is definately root bound and way too bring for the pot it's in. I have no idea how to transplant this or how to break it down into smaller plants without damaging it. Does it have a normal root system like other plants? What is the best time of year to do transplanting?