My grandpa always grew watermelon when I was a kid, but we tried it last year and had no luck with it. Although, we didn't have great success with any crop last year, except zucchini and peas. It was hard with us both working longer hours. I am going to try again this year though, just to see.
Last year was a bad year for the garden. What little did do well - ended up being eaten by some feathered friends before I got to it. I think my 4 successful crops that actually made it into the human food chain were garlic, tomatoes, beans, and swiss chard and that's only because they are planted out of reach of the feathered friends. And - I had to give the garlic away after learning I was allergic to it.
Gosh, I went through 2 huge pea packets last year, and they did terrible. I'm now waiting to see if I'm going to have bad pea luck this year, too - because I'm not seeing much of anything yet. I'm giving up growing broccolli and cauliflower. 5 years trying - I've learned it's just not worth it! My lettuces, turnips, radish and pumpkins just didn't do well last year. Corn did OK, but the feathered friends got into before we could.