Every year I grow lots of pumpkins and there are often a few that don't
ripen by the end of the season. However, they will ripen in time. I
just harvest each one, being careful not to knock off its stem, then I
wash off the dirt, towel it down, and set it in a protected place under
my eaves while there's still sun and no hard frost. When the
temperatures drop to freezing, I bring any still ripening inside and
keep them in a relatively cool spot near a window. They ALL ripen in
time, even though some may take many weeks.

Pumpkins make THE best soup.

Argo
http://greenrealm.blogspot.com (a science fantasy)