Be careful; they're toxic raw or undercooked (actually, this is this is the first time I've heard of anyone trying to eat them; they're usually a curiosity ornamental.)
Oh, and it's a tropical vine/climber, so you'll need a greenhouse/indoor space with a LOT of room.
I honestly don't remember. It got added to the side path flower patch, which I tend to forget about. I don't even know if it's still there or not (apart from the Scotch Broom and some Black Eyed Susans, I don't know WHAT is still there.
There's a more fundamental problem with cucurbits setting good seeds. It's the same one in common with all obligate outcrossing flowers; how much seed one gets is a function of how well pollinated they are, and how well pollinated they are is often a function of how many plants one has. I often...