Pumpkins have been grown in North America for five thousand years. The largest pumpkin ever grown was 1,689 pounds. The largest pumpkin pie ever baked was in 2005 and weighed 2,020 pounds. Pumpkin seeds should be planted between the last week of May and the middle of June. They take between 90 to 120 days to grow and are picked in October when they are bright orange in color. Their seeds can be saved to grow new pumpkins the next year.