We've planted watermelons on campus this year and while we have no idea if this will bring about a decent crop, we're hopeful. But reading about watermelons I came across any number of stories on how to grow square melons. Yes, square. The process for this originated in Japan because the round melons rolled around too much and were the wrong shape for smaller Japanese refrigerators. To someone invented a plastic box into which the newly formed melon was placed. Then as it grew, the melon took on the shape of the box.
The problem is these boxes are expensive and when you add up the number of melons growing on each vine, the cost would be prohibitive for most of us. Maybe that's why these melons cost upwards of 100 dollars each in Japan.
It might be fun to try just one or two, though, if someone could construct a similar type box.