I have never had this happen to me before. This year after I picked all of the green ones right before the hard frost a few weeks ago and brought them inside; I thought nothing of it. This is just how it goes here, nobody gets red tomatoes actually on a plant.

Usually I bring them inside, stack them shallow in cardboard flats, stuff a couple apples in, and cover them with a towel. And voila ripe tomatoes a few weeks later.

This year however they are developing tough light brown areas on the stem side and getting all moldy. They do not get soft the way you'd think a rotten tomato would. I cut one open where its brown and its brown on the inside too, but hard still as if it was just a regular tomato only brown. ANd then it molds.

I am not convinced that its like a blossom or stem end rot. WHen they were picked they were perfect.

The roma's don't seem to be affected at all (one did go rotton, but it was super big and I think something else got it - like proximity to the gross ones), but I had eight or so other varieties that I was trying out (like uncle joe's, black cherries, white cherries, etc) and another three that are my standby's (like manitoba and brandy-something-that-I-can-never-remember).

Does anyone know what this might be?

I don't currently have a picture but I could pluck one out of the box and take a snap if it would help.

At this point I think I am going to lose 90% of my winter supply.