Crimson Sweet Watermelon. Credit Southern Exposure Seed Exchange Watermelons are delicious as a snack on a hot day in the garden, helping improve your heat tolerance. If lightly salted to balance the electrolytes, they can cure dehydration. The seeds, if well chewed to break up the indigestible seed coat, can provide amino acids, fatty acids, vitamin E, potassium and phosphorus. Watermelons are easily digested and add fiber to the diet. Second only to tomatoes as a source of lycopene (said...