

I won’t be able to confirm your guess for about a month though, since I don’t have the answer to my own question. You have these two pictures of the same plant to aid in your guessing!
Adventures of an urban homesteader growing greens, preserving the harvest and tending a backyard barnyard
by: Renee Wilkinson
my money is on pumpkin! it would have developed the little neck already if it was a crookneck squash.
I tried to keep all my seeds organized this year, and for the most part I did….but I have several volunteer pumpkins, presumably from my compost! I didn’t plant pumpkin this year but we’ve got several of them out there, some ready right now. Silly pumpkins!
I’m not sure what you’ve got is pumpkins, though, Mine were green until they got big and yours look yellow. Maybe some other kind of winter squash. I know I’m not very helpful.