The pumpkin contains seeds, which can be saved to grow new pumpkins the following year. While growing, pumpkins require a lot of moisture and sunlight. It takes about 90-120 days for a pumpkin to grow after it has been planted. Pumpkins are picked in October when they are bright orange in color. Here's another web site I used for the following information.
Pumpkins grow in the field on plants which have long sprawling vines.
The seeds are planted in the field from the last week of May to the middle of June. After seeds are planted, they will germinate in 7-10 days, depending on the variety. During this time, seeds need moisture and warmth. Once seeds have germinated, they will send up their first leaves, called seed leaves. The true leaves generally appear next.