Did you know? Thumping on a watermelon and
listening for a "hollow" sound isn't particularly accurate way to pick a ripe watermelon. Sometimes,
that hollow sound actually means the melon has turned to mush. The best method is to look for the curly tendrils on the stem near where the fruit is attached
to turn brown. If they look half dead, it's ready for picking. You
can also check the underside of the melon. A ripe fruit will have a
cream- or yellow-colored spot from where it sat on the ground while
ripening in the sun.