Title: Why Does Watermelon Split While Growing? | Home Guides | SF Gate
Headings: Why Does Watermelon Split While Growing?
Why Does Watermelon Split While Growing?
Causes of Splitting Watermelons
Watering Patterns
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Growing the Right Variety

Content: Causes of Splitting Watermelons
Watermelons split on the vine for several reasons, with erratic watering patterns being the No. 1 cause. Heavy rain, especially after a period of excessive heat, is another common factor. High temperatures can also cause watermelons to split, though this occurs much less frequently. Watermelons are most susceptible to splitting in the last few weeks before ripening, but you should take steps to prevent this from happening as soon as you plant the melons. Watering Patterns
Watermelons are a drought-resistant fruit with roots that reach deep into the soil. The plants respond best to deep, infrequent, regular watering. Apply 1 to 2 inches of water once or twice a week, making sure the water soaks deeply into the soil. A drip irrigation system or soaker hose work well for this. Deep watering consistently is especially important during the first three to four weeks as the root structure is developing.