Have you noticed tomato fruit that looks rotten on the bottom? Technically, brown spots on tomatoes from blossom end rot is caused by this.
A water-soaked spot at the blossom end of tomato fruits is the classic The water -soaked areas enlarge and turn dark brown and leathery.
The first sign is a brown discoloration near the bottom end of the fruit. These spots grow and darken until they cover up to half of the tomato, and.
If you have tomatoes turning brown on the bottom then you are not alone. This time of year we have many calls about brown spots on tomatoes.
The bottom side of the tomato (either a green or ripened one) develops a sunken, leathery dark brown or black spot. Gardeners most often notice BER when fruit.