Question: how long will a jack o'lantern last?
Answer: "If the pumpkin was healthy when picked and diseases were controlled in the field, the pumpkin can last 8 to 12 weeks," he says via email. He adds jack-o-lanterns don't fare as well: They last five to 10 days. The best storage temperature for pumpkins ranges between 50 to 55 degrees Fahrenheit, he says.