I took this pic today of my T. 'Victoria' which is ionantha x brachycaulos. It's getting a bit too big for it's mount. Should I just go with a bigger mount or divide it?
i would make a bigger mount. See if you can make it into a ball. It would look great when they eventually multiply especially at flowering time!!
Yeah, bigger mount for sure! Too pretty to split!
If I lived next door I would say divide it, because I don't live next door I would let it get bigger.
I have a small ball of ionantha growing without a mount tied to a bit of string.