Hi there. There are now varieties of pumpkins that are bred for shorter growing seasons. you might also check the catalog or seed packet for varietal info. Some pumpkins are better for pies, some are bred to make great Jack-o-Lanterns, and still others are tiny and can be used as ornamental decoration. I live in a Zone 3 and grew some smaller pumpkins that are great for soups and pies. Check the seed packet first. Somewhere on it should be the number of days needed from planting or transplant to when you can harvest ripe pumpkins. As long as this number is within reasonable range of the time between your last frost in the spring and first frost in the fall, with proper watering and pest management you should be able to grow pumpkins. You can extend your growing season, but starting seedlings in your house about 4 weeks before last frost and then transplanting. Another option is to buy seedlings from a nursery/greenhouse and transplant out in your garden. Just take into consideration that pumpkins are of the squalsh family and the plants need lots of space. The main plant will need about 3 ft x3 ft minimum but 5 feet is better and the runners where the fruit sets will be 7 or 8 feet. To get larger pumpkins remove all but 2 or 3 fruit per runner (or fewer) and allow these to mature and leave on the vine as long as possible. Good Luck!