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tomato discoloration #751568

Asked May 23, 2021, 12:27 PM EDT

What is causing the dark splotches on some of our tomatoes?

Harris County Texas

Expert Response

The fruit has blossom end rot which is caused by a calcium deficiency. Please see the attached links.

https://aggie-horticulture.tamu.edu/galveston/Gardening_Handbook/PDF-files/GH-059--tomato-blossom-end-rot.pdf

https://aggie-horticulture.tamu.edu/vegetable/problem-solvers/cucurbit-problem-solver/cucurbit-fruit-disorders/blossom-end-rot/

https://www.aces.edu/blog/topics/lawn-garden/blossom-end-rot-in-tomatoes-causes-and-prevention/

Thanks for the question.

Paul Winski Replied May 25, 2021, 11:49 AM EDT

This work is supported in part by New Technologies for Ag Extension grant no. 2020-41595-30123 from the USDA National Institute of Food and Agriculture. Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the view of the U.S. Department of Agriculture.

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