Watermelons are coveted items on a hot summer day. A great problem with watermelons is that they can grow only during the summer and early fall. There is a way, however, that ensures that you can enjoy this summer fruit year round - dehydration. During the summer you can take a ripe watermelon and dehydrate slices in an oven or in the sun. Dehydrated watermelon tastes especially sweet because the fruit's natural sugars are concentrated after the water is removed. The watermelon rind can be pickled, too, thus enabling the entire watermelon to be enjoyed year round.