Halloween is over, but the pumpkins on your porch may have a few more weeks in them. A lot of people in Ohio would like their fall display to carry right through to Thanksgiving, which falls on November 26 this year. Whether it makes it depends on two things: how long a whole pumpkin can last, and what an Ohio November does to it.
The calendar works in your favor
A healthy, uncarved pumpkin can last about 8 to 12 weeks, and sometimes longer if it was cured and handled well. If you set your pumpkins out in early October, Thanksgiving is about seven or eight weeks later. That is well within what a good pumpkin can do. Carved pumpkins are another story. They usually last about a week to ten days, so plan on retiring your jack-o-lanterns now and keeping the whole pumpkins.
The weather is the real test
The National Weather Service office that covers southwest Ohio keeps records of when the first fall freeze arrives. Using 1991 to 2020 data, the normal date of the first 32 degree reading is October 25 at both Dayton and Cincinnati. By about November 5 at Cincinnati and November 7 at Dayton, nine years out of ten have already seen that first freeze.
In other words, a pumpkin display that stays out until Thanksgiving in Ohio will almost always see freezing nights first. The question is how cold those nights get.
How cold is too cold?
A light frost is not the end of a pumpkin. Lee Beers of Ohio State University Extension said in October that not much damage happens to ripe pumpkins around 32 degrees. The risk goes up at about 28 degrees or below, when water inside the pumpkin's cells can freeze and leave soft, mushy spots as it thaws. He also noted that the damage can take two to three days to show up.
Cold can also work more slowly. Oregon State University Extension notes that pumpkins can be damaged by long periods below 50 degrees and recommends storing them at about 50 to 55 degrees. University of Minnesota Extension describes chilling injury from cold nights that leaves water-soaked or sunken patches, which then break down faster. Our post on whether pumpkins need to come inside when it frosts goes into more detail.
How to get your pumpkins to Thanksgiving
A few habits make a real difference through November.
Watch the forecast. When a night in the upper 20s or colder is coming, cover the display with an old sheet or blanket in the evening and take it off in the morning. Smaller pumpkins and gourds can spend the night in a garage or on an enclosed porch.
Keep the bottoms dry. Cold and damp together are hard on a pumpkin, so keep them off wet steps and soggy mats. Set them on a dry board or piece of cardboard and swap it out when it gets wet.
Check once a week. Press gently on the bottom of each pumpkin. A soft or leaking pumpkin should come out right away, before it spreads rot to its neighbors.
Use shelter if you have it. Pumpkins under a porch roof, against the house, stay drier and a little warmer than pumpkins out in the open.
When to call it
Even with good care, a pumpkin that has been through a hard freeze may not last much longer. If one turns soft, dark or watery a few days after a cold snap, pull it. If most of your display comes through firm, you are in good shape for the holiday.
Timing at the start of the season matters too. Our post on when to put pumpkins out in Ohio explains how setting pumpkins out at the right time helps them last.
The short answer
Yes, in most years a healthy, uncarved pumpkin can make it from early October to Thanksgiving in Ohio. Expect a few freezing nights along the way, cover the display when temperatures are headed into the 20s, keep the bottoms dry and check them weekly.
Questions about your pumpkins?
If you have a pumpkin question we did not cover here, we would be glad to help. Call or text us at (513) 409-0005, or send a message through our contact page. We are a family-run business right here in the Springboro, Dayton and Cincinnati area, and we are always happy to talk pumpkins.