I have an adenium (obesum i think?) that has some rot in the caudex. What happened is some rain accumulated in a dimple on the caudex and apparently rot set in. You couldn't really tell unless you looked closely but when I touched it i felt a bunch of vertical soft necrotic tissue. I immediately tried to remove all of that but it went pretty deeply. I got what I could and sprinkled cinnamon in there (internet tip.. good thing?). I've been watching it for about a week. When I probe back in there I can still feel some soft tissue but it seems to have healed for the most part and dried out. I've kept it out of the rain and let it dry out (not watering for now).
The main problem I'm having is that the entry point is narrow but goes back pretty deep so it's hard to tell how things are going inside. The plant still looks healthy but I've had a few leaves yellow. I want to be proactive. I've considered cutting a wider opening so I can open it up and get more airflow in there and also get a better look to make sure I'm getting all of the necrotic tissue out.
I'd really appreciate some of the pros here guiding me. Thank you so much for taking the time to help. I've attached some pictures.
I'm relatively new to adeniums so apologies in advance for any rookie questions.
