Living · 6 pages · 12 min
The fruit's far end misses calcium when water delivery swings, even in adequate soil.
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Blossom end rot is a dead, sunken patch at the far end of a tomato or a similar fruit, tied to a local shortage of calcium in that tissue while it is growing fast. The shortage is usually a failure of delivery associated with uneven water, not a simple verdict that a soil test found the ground poor in calcium. The opening covers calcium rides the water stream, the fruit tip is a weak destination, and dry then flood during early fruit.
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