I subscribe to Plant Care Today. I find lots of really good information and recommend the newsletter and website highly.
Today they published ways to keep your carved or uncarved pumpkins from rotting. I wish I had this information years ago when I was trying to be proactive and find a pleasing shape with a good piece of stem remaining on the top – AND keep it in good shape for Halloween – AND remember safety tips once you use the ideas. I’m reposting their good information here. –
Below you’ll find a number of solutions and techniques you can use to preserve your pumpkin, keep it from drying out, extend its shelf life (don’t expect long-term storage life) and slow down developing mold.
Apply A Bleach Solution
Perhaps, the best method to prevent your carved or uncarved pumpkins from rotting is allying a bleach solution to and on it.
Spraying your pumpkins, including the inside, the edges and all cut openings with a mixture of 1 tablespoon of bleach per quart of water can get rid of all the mold, mildew and other unwanted stuff.
Another way is to put the pumpkins in a bucket and soak them in the same bleach solution with water for about 20 minutes. Giving your decorated pumpkins a solid misting with a bleach-based spray, such as Clorox Cleanup with Bleach can also come to the rescue.
Borax Rich Pumpkin Preservation Sprays
Specially formulated to prevent pumpkins from decaying, several commercial pumpkin preservative sprays such as Pumpkin Fresh and Pumpkin Dunk’N extend the storage life of your carved pumpkin and keep it from rotting.
Containing water, borax and sodium benzoate, they work as a fungicidal solution that kills bacteria and mold. All you need to do is dry the surface and spray the pumpkins with any of these marvelous sprays to make them last until your Happy Halloween.
Rubbing Alcohol or Floor Cleaner
Spraying some rubbing alcohol can work wonders when it comes to keeping pumpkins from rotting and avoiding mold build up.
Floor cleaners can also work as excellent preservatives for uncarved pumpkins, keeping them shiny and fresh for up to four weeks. All you need to do is apply an acrylic liquid floor cleaner to a wet towel and wipe the pumpkins with the same.
Acrylic Finish Spray or Hair Spray
Hair spray and acrylic finish spray are another great sealants that prevent pumpkins from getting dehydrated and work as a barrier to mold growth, at the same time preventing rodents from eating your jack-o-lanterns away.
Exhibiting anti-freezing and water-repelling properties, WD-40 is amazing when it comes to keeping uncarved pumpkins fresh for longer. WD-40 also prevents insects and other creepy crawlers from swarming around the inside of your decorated buddies.
Carved pumpkins can reap the benefits too! Simply spray WD-40 over the surface of the pumpkin and wipe off the excess, followed by waiting a day to allow the spray to dry completely before you place a candle inside.
Petroleum Jelly Sealant/ Tabasco with Vaseline
You can make sure that pranksters think twice about touching your pumpkin art by applying petroleum jelly to your sterilized carved pumpkin.
Smearing just a thin layer of petroleum jelly on the interior, the edges, and the cut-out sections of your jack-o-lanterns to create a barrier to combat bacteria from reaching the flesh and keep moisture trapped inside, at the same time adding some shine to them.
If you are going to paint your pumpkin, you can use Vaseline as a sealant to protect your work and help them last an extra week. Tabasco sauce plus petroleum jelly together help to repel pesky pumpkin-eating critters.
Most of the vegetable oils available out there can be quite helpful in preventing a pumpkin from getting rotten. Dry the pumpkins completely and rub a small amount of vegetable oil taken on a paper or cloth towel over the surface, in a way that it looks shiny but isn’t greasy.
Avoid Exposure To Sunlight
Pumpkins rot quicker when exposed to direct sunlight. Put them in a place that’s away from the sun and try to keep them as cool as possible to make them last for about a week. In warm weather, you can also put your pumpkin in the refrigerator, but make sure you don’t freeze it.
Hydrate The Pumpkins
Over time, pumpkins tend to start getting drying out or shriveled as they lose water content. In order to revive a dried out pumpkin, submerge it in a bath tub or a bucket of water overnight or at least, for a few hours. Make sure you wipe off excess water after taking the pumpkin out to prevent molding.
*Remember, chemicals and oils are usually flammable and can prove to be dangerous if you choose to keep your pumpkins from rotting with these solutions and place candles insides.
*Instead, you can put glow sticks or battery-operated tea lights inside your Halloween jack-o-lanterns.
Thanks, again, to Plant Care Today. Click on the link to check them out and see if you’d like to sign up. I’m glad I did.