Preserving a jack-o-lantern depends on three things: limit sun, keep temperatures cool, and control moisture. Simple treatments like petroleum jelly, salt, vinegar, or a pumpkin preservative can slow mold and decay, helping the carved pumpkin last through Halloween.
Essential Concepts
Keep it cool, dry, and out of direct sun.
Seal cut surfaces with petroleum jelly or similar treatments.
Use preservative, vinegar, or diluted bleach carefully.
