Stop blossom end rot on tomatoes Home › Forums › Edible-Garden Questions › Vegetables & Herbs › Stop blossom end rot on tomatoes Tagged: tomatoes This topic contains 1 reply, has 2 voices, and was last updated by Anonymous 6 years, 10 months ago. Viewing 2 posts - 1 through 2 (of 2 total) Author Posts July 16, 2010 at 3:07 pm #29072 Anonymous I have about 13 tomatoes plants, I am beinging to see blossom end rot on some of the fruit. Is there anything I can do to stop this from ruining all of my tomatoes? July 17, 2010 at 1:53 am #29532 Anonymous Here is ‘everything Margaret knows about tomatoes’. Blossom end rot is caused by calcium deficiency and water stress. Try the tomato troubles FAQ in the above link for more info. Author Posts Viewing 2 posts - 1 through 2 (of 2 total) You must be logged in to reply to this topic.