Common Plant Diseases and Disorders

Find out how to recognize and treat wilt, scab, canker, blackspot and more.

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Blossom End Rot Indicates Irregular Watering
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DK - How to Grow Practically Everything © 2010 Dorling Kindersley Limited

Blossom end rot

Dark patches on tomatoes are a symptom of calcium deficiency, caused by drought or irregular watering. Water more often and apply a tomato fertilizer every week after flowering.

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