PUMPKIN JACK O'LANTERN SEEDS
Pumpkins are very frost sensitive. You should wait until the days average at least 70°F and the last chance of frost has passed. On our farm we generally plant all of our pumpkin varieties the first week of June. Depending upon where you are in the United States, you can generally plant between late May and late June. If you plant any later than late June, large pumpkin varieties won't be mature in time for Halloween, and may be damaged by fall frosts.
Most pumpkin varieties take between 85 - 125 days to mature. Most of the heirloom and larger varieties are on the longer end of the spectrum. The number of days to maturity will be listed on your seed packet that you purchased. If you would like to have pumpkins on October 1st, count backwards to decide when to plant.