Well, if the pot is large enough, it's possible to grow anything in a pot. A couple of years ago on the 'Victory Garden' tv show, they showed a public building in S. California which was growing trees about 40 feet tall in containers about the size of a large luxury SUV.

I think that you could probably do ok with watermelons in large containers, something whiskey barrel sized or larger, especially if you're consistent and careful with your watering and fertilizing. You could set up an automatic watering system with a timer and really pamper it if you wanted to, with a small fertilizer injection system as well.

I do think, though, you'd be better off with small-fruited, more compact varieties in containers -- it's just my "gut instinct" that these would adapt better to container culture than a large-fruited variety.

Dennis
SE Michigan

I grew watermelon in a whiskey barrel sized plastic container once as an experiment. It was a small fruited type. I put two plants in the pot and I only got 4 melons or so. They might have done better if I had been better with my fertilization program. I sprinkled tomato tone on them when I fertilized my tomatoes since they where close by. The plants still took up about a 16 foot diameter space.

You can grow melons in pots, but it must be at least 20 gl in this case bigger is much better, I would go at least 30 to 40 yes these are big pots; but worth it.

P.S
No seedless in pots, you would need a pollinator to get fruit set

Hey Jsvand5; I don't know how to post a direct link on this site but you should check these out.
http://www.seattleoil.com/Flyers/Earthbox.pdf