A square watermelon grows in a mold
Кубічний кавун у Японії; документальне фото сформованого плоду, не доказ ціни транспортування чи спадкування форми / A cubical watermelon in Japan; a documentary shaped-fruit image, not evidence of transport cost or inherited shape. Credit: Cat; CC BY 2.0. https://creativecommons.org/licenses/by/2.0 Source: https://commons.wikimedia.org/?curid=5183458
Zentsuji square watermelons in Japan are produced by growing fruit inside a rigid mold, rather than creating a separate “square” biological species. Local authorities describe them as ornamental products: fruit is harvested immature to preserve the shape, making it unlike an ordinary sweet eating watermelon. A convenient shape does not establish that this is generally a cheaper way to supply edible watermelons.