Blossom -end Rot - Knowledgebase Question

Kennewick, WA
Question by dwhite1932
June 30, 1999
If blossom end rot is due to lack of calcium how can I add calcium to my container grown tomatoes? I fear I may be over watering.

Answer from NGA
June 30, 1999


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 this web site for more information and details of how calcium affects water relations in tomatoes.

I hope this is helpful.

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