Helen, read and weep

Brother came to see me and brought me a bag of GOOD Arkansas tomatoes, I had forgot how good they were. I set with a towel and sucked on one while he was here.  They were so sweet and good but they are really early because usually we don't have tomatoes until 4th of July.
Clayton said he had  tomatoes that was rotten on the end like Fleta had. He called it blossom rot and Fleta thought it was a lack of calsum that caused it.
Information about blossom rot from my computer...
Symptom : This is a common problem with homegrown tomatoes. It initially appears as a depressed, leathery, brownish area the size of a dime to a half dollar on the blossom end of the fruit.

Cause : It is caused by a calcium deficiency coupled with wide fluctuations in available moisture. Training and pruning the tomato vines may also increase blossom end rot.

Remedy : Remove the affected fruit so other fruits on the plant will develop normally. Keep the plants well watered. Mulch to maintain a more uniform moisture supply. Avoid cultivating, or hoeing, near the roots of tomato plants. Some gardeners like to add crushed eggshells to the transplant hole to fortify calcium intake.