Blossom End Rot

Adverse environmental conditions

image of blossom end rot on a melon

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Blossom end rot is often misdiagnosed as a fruit disease. The blossom end of the fruit fails to develop normally, turning black-dark brown and eventually shriveling and becoming hard. Blossom end rot is usually due to a nutritional imbalance that is exaggerated by alternating periods of water stress.

Provide even soil moisture and follow recommended fertilization practices noting particularly the balance between nitrogen and calcium.

The information given herein is for educational purposes only. Reference to commercial products or trade names is made with the understanding that no discrimination is intended and no endorsement by the Texas AgriLife Extension Service is implied.

Educational programs of the Texas AgriLife Extension Service are open to all people without regard to race, color, sex, disability, religion, age, or national origin.

Publication Revised July 2009

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