Calcium Deficiency in Tomatoes - Knowledgebase Question

Gettysbueg, PA
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Question by s424480
February 20, 1998
I am a freshman at Gettysburg College and I am doing a report on calcium deficiencies in tomato plants. I was wondering if you could help to direct me as to information on this topic as there is very little information.

Answer from NGA
February 20, 1998
You'll probably find that most references to calcium deficiency in tomatoes refer to "blossom end rot". Rather than being caused by a disease, this symptom is caused by poor water relations. For example, if a dry spell is followed by a heavy rain, blossom end rot is a likely result. Gardeners try to keep soil moisture as even as possible--a thick layer of mulch sometimes does the trick.

The actual mechanism for blossom end rot involves calcium--check out some web sites for more information about the details of how calcium affects water relations in tomatoes. I searched the Web, using Infoseek, first using the word "calcium", then searching within that for "tomato", and finally searching those results for "deficiency". There were quite a few responses, so you might want to check them out. One of them was Colorado State's site:

I hope this is helpful.

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