You can certainly grow your own pumpkins. Some gardeners plant their pumpkins in their gardens and control the vines from running all over the garden, while others plant them in containers and train the vines to go up on trellises. Pumpkins grow well in rich soil so add compost and organic matter for best results.
A very informative article below on how to grow your pumpkins was taken from the Bonnie Plants website.
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Like its cousin the cucumber, pumpkin demands warm, fertile soil for growth. Soil pH should be 6.0 to 6.8. Plan to give each vine at least a 3-foot diameter mound, or hill, of warm, enriched soil. Test your soil every year or two to determine how to amend it for ideal pumpkin growth. Avoid adding nitrogen “just in case,” because too much nitrogen causes vines to produce leaves at the expense of flowers.In cool climates, warm the soil a week before planting by covering it with a piece of black plastic. To plant your pumpkin seedlings, cut a hole in the plastic and plant through the hole.
Pumpkin vines grow aggressively, covering lots of ground. To keep your garden from being engulfed by vines, site plants near the edge of the garden. As vines grow, direct them toward the outside of the garden. Space full-size plants 5 feet apart, and mini pumpkins 2 to 3 feet apart.
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To read the entire article go over to Bonnie Plants website.
Head over to Page 3 to watch a short video which gives some tips on building trellises for your plants to climb on.