tomatoes - Knowledgebase Question

Griffin, Ge
Question by mwreeves2829
June 26, 2010
My tomatoes are rotting on the vine from the bottom of the fruit. Can you tell me why and how do I stop this?

Answer from NGA
June 26, 2010


What you describe sounds like blossom end rot, a physiological condition caused by a lack of calcium at the growing tip of the fruit. While your soil may have adequate calcium, fluctuations in soil moisture content from dry to wet really increase the incidence of blossom end rot. It is especially bad on the early fruit each summer and in sandy soils, or in your case, well draining potting soils. The damage occurs as cells die at the tip of the fruit. In time (and as the fruit grows) the spots enlarge and turn black. So, by the time you see it, the damage actually has already occurred some time back. Remedies include: having a soil test to make sure calcium levels are adequate, keeping plants evenly moist, especially during the development of the first fruits, and spraying plants with a Blossom End Rot spray (contains calcium) which can usually be purchased from your local garden center.

You must be signed in before you can post questions or answers. Click here to join!

« Return to the Garden Knowledgebase Homepage

Member Login:



[ Join now ]

Today's site banner is by wildflowers and is called "Japanese Spirea"