Here's a checklist for other tells. Read More: The Only Way To Store Whole Watermelon, According to Farmers Don't take chances. Besides, life it too short to mess around with bad watermelon.

But watermelon still has about 17 grams per slice, so it's best not to load up on too much of it at once. And while it's often eaten by the slice, the fruit's "natural sweetness" also makes it a ...