Jenny stumbled across an article about the square watermelons.
They are a specialty of Zentsuji on Shikoku Island in Western Japan. The watermelons were first grown thirty years ago. They are grown in special plastic containers. About 800 are grown and shipped across Japan during the month of July. Each Melon can sell for up to 25,000 Yen (approximately $250.00). They are used mainly for decoration as they are reported to be not so sweet.