tarev said:Sad to see that Keith 
When I try to root cacti, what I do is apply a dab of cinnamon on the fleshy exposed part and really wait a long while for the plant to fully callous and form a scab, then I put it in soil. I never apply rooting hormone for them. Usually I time it when it is warmer weather to summer, when temps are really more stable. Media I use is really very course, almost more rocks than soil.
Looking at your photo, I think that cactus should have been re-grafted to another cacti with chlorophyll, and not attempted to root in soil.
I wanted to share this photo from the person I got it from, these do survive on their own roots just fine. Pure yellow,red,orange and pink cannot but any bit of purple or green color feed the plant even if the rest isn't. Grafting of variegated ones is to make them grow faster, but they can grow on their own.
