Lookee here! In Japan, you can get watermelons that aren't
round, but squarish!!
Square Watermelons
They sure ain't cheap though! I'm wondering, why
bother?
Maybe, sooner or later, they will grow heart-shaped watermelons
for Valentine's Day where they can retail for at least $100 for
lovesick pups eager to demonstrate their 'love' by indulging in
something new and unusual. 
Or how about Christmas tree-shaped Watermelons for
Christmas? 