Also, I checked out the problem solver, and my leaves and stems look like the pictures for early blight, but the rotting on the tomatoes are not leathery like the problem solver shows. They look more like (but not exactly like) the pictures for blossom end rot. However, the rotting parts are never on the blossom end, always on the side towards the stem.

If they are toward the stem, it's not BER. As far as ripening goes, green ones don't ripen well unless they have started to turn. I can't get a completely green one to turn at all--I think they are good for nothing but fried green tomatoes.

There are some other pathogens that cause rotten spots....keep looking for pics. I wish I could help more with the diagnosis, but it's all so confusing sometimes.

What does the rotted spot look like? Is the skin intact, or is there a hole hidden under the stem? How large is it?

Some fungal diseases can affect fruit, but it's more often things like sunscald and BER. Or tomato fruitworms, which burrow in under the stem and eat out the top of the tomato. The size and color of the rotten spot would help narrow things down.

--Alison