Why Your Tomato Plants Have Bottom Rot And How To Prevent It - Tasting Table
Briefly

Blossom end rot (BER) is a prevalent issue for tomato gardeners, resulting from a calcium deficiency caused by inconsistent watering rather than pests or diseases. Even when soils contain ample calcium, tomatoes require a steady water supply to transport this nutrient effectively to their fruit. Factors like damaged roots from harsh pruning, heavy rains, or dry spells can also contribute to BER. Gardeners can prevent bottom rot by implementing a regular watering schedule, providing about 2 inches of water per week, and using mulch to retain moisture.
Blossom end rot (BER) is a common tomato issue, caused by a calcium deficiency, often due to inconsistent watering rather than disease or pests.
To prevent bottom rot, maintain a watering schedule of about 2 inches per week, supplemented by mulch to retain moisture in the soil.
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