Blossom End Rot is very common on tomatoes, peppers, squash, cucumbers, and melons. It usually forms on the bottom of the fruit causing a brown, water-soaked spot. The cause of this? A calcium imbalance in the fruit. The imbalance occurs when there are fluctuations in soil moisture or excessive fertilization.
What can you do?
Pick and discard the affected fruit, allowing the plant to channel all its energy into the growth of the remaining fruit.
Apply Rot Stop. This will give plants the extra calcium it needs to maintain stronger more disease resistant plants.