Title: Watermelon Has Black Bottom - Why Is Watermelon Rotting On Bottom
Headings: Watermelon Bottom Turns Black: What To Do For Blossom Rot In Watermelons
Watermelon Bottom Turns Black: What To Do For Blossom Rot In Watermelons
Why is Watermelon Rotting on Bottom?
Recovering from Watermelon Blossom End Rot

Content: When fruits are growing rapidly, they need lots of calcium, but it doesn’t move through the plant very well, so if it’s not available in the soil, they will be deficient. A lack of calcium ultimately causes rapidly developing cells in fruits to collapse on themselves, turning the blossom end of the watermelon into a black, leathery lesion. Blossom rot in watermelons is caused by a lack of calcium, but simply adding more calcium isn’t going to help the situation. More often than not, watermelon blossom end rot occurs when water levels are fluctuating during fruit initiation. A steady supply of water is required to move calcium to these young fruits, but too much isn’t good, either – good drainage is necessary for healthy roots. In other plants, excessive applications of nitrogen fertilizer can initiate wild vine growth at the expense of fruits. Even the wrong type of fertilizer can lead to blossom end rot if it binds the calcium in the soil. Ammonium-based fertilizers can tie up those calcium ions, making them unavailable to the fruits that need them most. Recovering from Watermelon Blossom End Rot
If your watermelon has a black bottom, it’s not the end of the world. Remove the damaged fruits from the vine as early as possible to encourage your plant to initiate new flowers, and check out the soil around your vines.