Nutrients in watermelon include lycopene and citrulline. Lycopene is a phytonutrient that plays a role in supporting heart health and possibly bone health. Citrulline is an amino acid that the kidneys convert into another amino acid called arginine; amino acids are the building blocks of proteins.
Watermelon is also a good source of phenols, such as cucurbitacin E, which have anti-inflammatory properties. Beta-carotene, the form of vitamin A that can be used by the body, is also abundant in watermelon, especially in the pink-fleshed varieties.
Vitamin C, an antioxidant, is also found in watermelon. Watermelon is also a good source of pantothenic acid, copper, biotin, potassium, vitamin A, vitamins B1 and B6, and magnesium.
Watermelon is a warm-season crop that thrives in the warmer climates of the American South. Both seeded and seedless varieties can be grown. The seedless varieties are generally sweeter because they don't invest a great deal of energy into seed production, but the seeds they do have are soft, pale and edible.
Because a watermelon is a large fruit and can weigh 25 pounds or more, it needs a great deal of space in a garden. It does best on sandy, loamy soil in full sun.