This has happened to three carmen peppers on this plant. Grown in zone 5.
1 Answer
Looks like
Blossom-end rot is an abiotic disorder of peppers caused by calcium deficiency during fruit development.
Image 2 to from this source
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I had ruled that out because I thought that started on the very bottom of the fruit. Commented Jul 18, 2022 at 13:14
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1Make a vertical cut in the bottom: It most likely starts on the very bottom inside the fruit. Commented Jul 18, 2022 at 14:24
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Interesting! I already trashed them but I will investigate if any others pop up Commented Jul 18, 2022 at 15:01