When are these three white melons and red watermelons planted?

It was planted around June of the lunar calendar.

There is almost no arable land in most parts of the country.

Wei county, Hebei province, Nanzhang township, Wanrong county, Shanxi province, and Tonghua town are widely cultivated. The three white watermelons produced in their town are famous for their sand, sweet taste, high water content and rich nutrition.