How to Tell if Your Watermelon is Ripe GardenRx: How to Tell if Your Watermelon is Ripe / PBS-TV’s Garden Rx starring Loren Nancarrow reveals how to know when your watermelon is ripe and ready to pick. Watermelons are a delightful summer fruit, and there’s nothing quite as satisfying as biting into a juicy, perfectly ripe one. But how can you tell if a watermelon is truly ripe? PBS-TV’s gardenRx can help you with some tips and tricks to ensure you…