Expert: Watermelon Shape and Color Don't Indicate Sweetness

People often wonder how to pick a good watermelon.

Some think the shape or color tells you, but an expert says that's not true.

Sweetness comes from a nutrient called potassium, but the balance is important.

The expert advises that a ripe watermelon feels heavy, sounds hollow when you tap it, and has a slightly dull rind, not a shiny one.

If part of the watermelon's skin is white, it means that part didn't get much sun and isn't necessarily less sweet.