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What causes blossom end rot on tomato fruits?

Our Advice:

Blossom end rot is a disorder rather than a disease, which is caused by a shortage of calcium and irregular watering makes matters worse. Treat the plants with calcium nitrate from Chempak at 50g in 5 litres of water, watered into the compost. This will not cure the affected fruits, but will help to protect new fruits from being damaged.

Gardening Expert: Steve Bradley

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