Well, I scurried outside and lifted up that Green Wheel and removed the rotting rosettes (there was a second one too!) and repotted the entire clump in an entirely different pot with a much sharper and sandier potting mix. Ran out of everything including my pea gravel, but I can mulch it later on. I then put it under cover so it doesn't get rained on! I hope it recovers.
Two healthy ones broke off during this process so I stuck them in Little Rock where they should be fine. (The other Green Wheel is there and is doing great.)
Glad I did that right away as it did rain right afterward. Fiddle.
