Plant guide:ðŸĨ’ Cucumber
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Growth

Blossom End Rot on Cucumbers

Commonly affects: Cucumis sativus (Cucumber)

A sunken, dark, water-soaked patch develops on the blossom end of developing fruit, expanding as the cucumber grows.

Potential Causes

  1. 1Calcium deficiency in developing fruit, usually triggered by inconsistent watering
  2. 2Rapid growth after a dry spell followed by heavy watering
  3. 3Root stress limiting calcium uptake

Solution Steps

  1. 1Water deeply and consistently throughout fruit development
  2. 2Mulch to help retain even soil moisture
  3. 3Apply a calcium supplement as a precaution in fast-draining soils
  4. 4Remove affected fruit, since the damage won't reverse

Prevention Tip

Even watering prevents blossom end rot far more reliably than added calcium alone — this is a watering-consistency problem first.

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