Tomatoes With Shriveled Skin?

Are the tomatoes in full sun? Is it real hot where you live? Sounds like the tomatoes are scalded from the sun.

I'd go to JerryBaker.com, to see if he has any natural solutions for you onLine. If not, I'd be inclined to think nutrient deficiency/wrong soil mixture, and dry air. I have had a lot of luck placing a thin cloth/umbrella over tomatoes when it's hot/dry. Also, plant BASIL around the base. Don't know why it works for me, but it does. Don't allow
too many green stems to be produced, so that the plant can concentrate on making good fruit instead.