Holly, I've separated them in the past. Mostly they survive, even the smaller ones. I'm referring to C. esculenta which I don't exactly consider precious. Here's the earlier one broken up.
The Xanths I don't know, first year. Since I've got way too many of all of them I may just leave most of the offsets attached.
Susan, Unfortunately I don't have a recommendation. What's the difference between an EE bulb and tuber? I've been treating all the Aroids with a large bulb/tuber/corm (btc) similarly. Overwinter in boxes next to the Callas. That's why I decided to pot up, and overwinter in the basement, the one's I received as small starts this year. Folks have said they can take a few years to develop large btc.
