Just a quick update with some of these stapelias. I repotted two arms that were attached to a main stem I had planted in pure perlite with a small water reservoir st the bottom. They've been in this mix on a heat pad for about a week(perlite temps 85-90F)
The main stem was turning yellow (it was yellow at the tip when I got it) and I decided I didn't want it to spread and saw that these two arms had fresh roots in the cup. So I broke them off and put them in a new container that will stay dry for a few days, so the cuts dry out hopefully.
These arms had no roots of their own when I potted last week.
So far the plants seem to be growing new roots in the pure perlite which for some I can see through the plastic cups.
I had to repot a couple smaller stapelias I had in this system. They had dried out dead center pieces when I potted them last week, and the dried out parts seemed to turn mushy in the heated perlite. So I broke their arms off like I did this larger one. They seem to do best when it's only healthy plants/arms put in this mixture system. Hopefully the healthy looking arms keep growing on their own.