How to Safely Recycle and Compost Halloween Pumpkins in Your Garden

Every year after Halloween, massive amounts of jack-o'-lanterns end up discarded, with composter Lauren Click estimating the post-holiday total at roughly one billion pumpkins. Instead of sending old decorations to landfills, home gardeners can easily convert clean rinds into nutrient-rich soil additives, livestock feed, or worm compost.

Recycling a pumpkin at home takes about 10 to 15 minutes using standard household tools like a sharp knife and a garden spade. Rather than tossing a pumpkin whole, cut the rind into small chunks to accelerate decomposition. These pieces can be buried directly beneath garden soil as green manure or added to an indoor worm bin, where composting worms like red wigglers consume the waste to produce worm castings, according to worm farmer Scott Kent.

Before you start: Inspect the pumpkin to remove candle wax, metal holders, glitter, or synthetic decorations. Avoid composting painted pumpkins or placing them in municipal yard waste bins where prohibited, and never leave treated rinds where wild animals can ingest them.

UK gardener David Denyer warns against leaving whole pumpkins sitting on top of garden beds or abandoning them in wild spaces. Thick rinds retain high water content, creating anaerobic slime and fungal threats like powdery mildew that can spread to nearby plants. Additionally, moldy pumpkin rot can cause digestive illness in wildlife such as hedgehogs and birds. Unpainted rinds can instead be donated to local farms as livestock feed for pigs and chickens, while smaller edible varieties like Hokkaido can be cooked into soups and clean seeds roasted for snacks.