Prizewinner Pumpkins This page first published: Aug 14, 2005 · Updated: May 9, 2018 · by CooksInfo. Copyright © 2021 · This post may contain affiliate links · This blog generates income via ads · Prizewinner Pumpkins are round, with reddish-orange rind. They weigh 80 to 120 pounds (36 to 55 kg.) Hybrid. History Notes Prizewinner Pumpkins were developed by the Harris Moran Seed Company. Released 1994.