Pumpkins grow in the United States in locations with hardiness levels 3 through 9. This designation covers most regions in the country, with the notable exception of most of Alaska.
Pumpkins are not difficult to grow and require very little nourishment, but they have a long growing season. An area must experience at least 75 frost-free days during the growing season or the pumpkins do not grow to full size. In southern states, it is best to plant them in early July, while late May planting is recommended in northern states. Pumpkin growth excels when the vegetables are grown from seeds planted directly in the soil. The soil should be warmed to between 70 to 95 degrees Fahrenheit. As pumpkins are sensitive to cold, full sun is ideal.