There are a few causes of watermelon splits. The most common cause for a bursting watermelon is erratic watering. Whether it’s due to poor irrigation practices or drought followed by heavy rain, excessive accumulation of water can put the fruit under a lot of pressure. As a result, the watermelon bursts.Click to see full answer. Regarding this, what causes watermelons to split open? Watermelon Fruit Split Fruit split is caused by an erratic watering pattern, particularly excessive irrigation or rainfall during the last two weeks of growth. The excessive moisture causes a great deal of pressure on the inside of the fruit, which will split open with even slight tapping or during normal harvesting.Subsequently, question is, can watermelons explode on their own? Watermelon splitting (or exploding) can be caused by the “exploding gene,” which is found in many of the heirloom varieties, or from increased water turgor in the watermelon. Pressure can build inside, causing the watermelon to split and erupt like a volcano or to foam uncontrollably. So there you have it, Ed. Furthermore, can you eat a split watermelon? Use cut watermelon within five days. The outside rind of the watermelon should be washed before you cut into it. The “broken heart,” “hollow heart” or cracked center that is sometimes found inside a watermelon is caused by weather conditions during the growing season. This flesh is still good and safe to eat.How often do watermelon plants need to be watered?Watering is very important—from planting until fruit begins to form. While melon plants are growing, blooming, and setting fruit, they need 1 to 2 inches of water per week. Keep soil moist, but not waterlogged. Water at the vine’s base in the morning, and try to avoid wetting the leaves and avoid overhead watering.