Yes, here are a few additional ways to determine if a watermelon is ripe:

7. Check the sugar content. You can use a refractometer to measure the sugar content of the watermelon. A ripe watermelon should have a Brix reading of 10-12%.

8. Check for dull skin. If the skin of a watermelon is shiny and smooth, it is likely unripe. As watermelons ripen, their skin will become dull, and you will start to see small white bumps on the skin, which are sugar crystals.

9. Tap on it. Tap the watermelon with your knuckles. If it sounds hollow, it’s ripe. If it sounds dull or muffled, it’s overripe. If it doesn’t make any sound, it’s underripe.

10. Look for a uniform shape. A watermelon that is uneven in shape or has irregular bumps or cracks on the surface is likely underripe or overripe. A uniform shape is a good indicator of a ripe watermelon.

These are just a few additional methods you can use to determine the ripeness of a watermelon. By combining several of these methods, you can have a high degree of confidence in your watermelon selection.
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