Now, you scare me with the "rotting" thing. Just yesterday, I found several Satsuma plums rotted because they split/cracked (inside bags, hard to notice) that I was not aware of. By the time, I knew what went on, they rotted!!!
I will see if I should harvest some Castleton plum later today and let they ripen more on a counter.
I've never cooked with plums. Do you have good recipes? I bet you do.