Flower-end rot
Calcium-Mangel
This description was machine-translated.
How to spot it
Flower-end rot is not a disease caused by a pathogen, but a deficiency symptom. Growing fruits lack calcium at the fruit tip. A watery spot forms there, sinks in, and becomes leather‑like brown‑black. Often there is not too little lime in the soil; rather, the plant cannot transport calcium to the fruit under drought stress or overfertilisation.
Prevention
You water evenly and avoid swings between waterlogging and drying out; a mulch layer keeps the soil moisture stable. You fertilise moderately and not too much nitrogen or calcium carbonate, as that blocks calcium uptake. Remove infected fruits; following fruits with more stable supply usually stay healthy.
Affected plants
These plants in our database are especially susceptible.
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