A large, water-rich melon with a thick striped rind and bright pink-red flesh — a summer staple worldwide and originally an African crop.
A botanical cousin
Watermelon shares its family (Cucurbitaceae) with cucumber, zucchini, and pumpkin. Like cucumber, it’s botanically a pepo — a berry with a hard rind. Despite the dramatic difference in appearance, watermelon and cucumber are about as related as apples and pears.
92% water
Watermelon is the most water-rich fruit commonly eaten — about 92% water by weight, which makes it the namesake-appropriate summer thirst-quencher. The remaining 8% is mostly sugar (around 6%) plus a bit of fiber and vitamins. The high water content also makes it heavy: a typical 5 kg watermelon contains over 4.5 kg of water.
African origin
Wild watermelons — small, hard, and pale-fleshed — grew across northeast Africa long before they were cultivated. Egyptian tomb paintings show watermelons being grown along the Nile over 4,000 years ago. The bright red flesh is a result of millennia of selective breeding for higher lycopene (the same red carotenoid that makes tomatoes red) and lower fiber content.
Seedless puzzle
“Seedless” watermelons aren’t truly seedless — they have small, soft, white seedless husks rather than hard black seeds. They’re produced by crossing a normal diploid plant with a tetraploid plant, yielding sterile triploid offspring whose seeds never fully develop. The plants can’t self-perpetuate; growers must cross-breed each generation.
Picking a ripe one
A ripe watermelon should:
- Have a creamy yellow “field spot” where it sat on the ground (a white or pale spot means picked early).
- Sound hollow when thumped (a dull thud means overripe).
- Feel heavy for its size (more water = more sugar).
- Have a brown, dried-out stem (a green stem means picked too soon).