Plant guide:🎃 Pumpkin
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⚠ Moderate🩺
Growth
Blossom End Rot on Pumpkin Fruit
Commonly affects: Cucurbita pepo, C. maxima, C. moschata (Pumpkin)
A sunken, dark, leathery patch develops on the blossom end of developing fruit — the end opposite the stem — while the rest of the pumpkin looks otherwise healthy.
Potential Causes
- 1Calcium deficiency in the developing fruit, usually triggered by inconsistent watering
- 2Rapid growth after a dry spell followed by heavy watering or rain
- 3Root damage limiting calcium uptake despite adequate soil levels
Solution Steps
- 1Remove affected fruit, since the damage won't reverse, letting the plant focus on remaining fruit.
- 2Water deeply and consistently, aiming for even soil moisture throughout fruit development.
- 3Mulch heavily around the base of the plant to buffer against moisture swings.
- 4Apply a calcium supplement (gypsum or foliar spray) as a precaution in sandy or fast-draining soils.
Prevention Tip
Consistent watering throughout the growing season prevents blossom end rot far more reliably than adding extra calcium to already-adequate soil.
