PlantLife Online

Answer

Sounds like you have a classic case of Blossom-end rot a disorder that affects tomatoes, peppers, and eggplants. The symptoms are a dry sunken decay that develops on the blossom end of the fruit. Blossom-end rot is not caused by an organism but is actually a physiologic disorder associated with a low levels os calcium. Calcium is required in relatively large concentrations for normal cell growth. When rapidly growing fruit is deprived of the calcium it needs, the tissues break down, leaving a sunken lesion at the blossom end. Drought stress or excessive soil moisture will reduce the plants ability to up take the nutrients is requires and maybe one cause. To control blossom-end rot maintain a relatively neutral soil pH around 6.5. Using lime will supply the calcium needed and maybe used in conjunction with a balanced tomato organic fertilizer as directed.