Composting Citrus Peels: Debunking Myths and Best Practices

Old advice warned against composting citrus peels (orange, lemon, lime), claiming they kill worms or decompose too slowly. This is false. Citrus peels are not only compostable—they benefit your pile.

Composting Citrus Peels Effectively

Citrus peels decompose slowly, but cutting them into small pieces speeds the process. Chemical oils in citrus used in organic pesticides break down rapidly and evaporate long before compost hits the garden—posing no threat to beneficial insects.

Bonus: Citrus peels' strong scent deters scavengers (raccoons, rodents) from your compost pile.

Citrus in Compost and Worms

Citrus peels don't harm worms in vermicompost, but many worm species dislike eating them until partially decomposed. Since vermicomposting relies on worms consuming scraps, citrus peels don't work well in worm bins. Keep them in traditional compost piles.

Citrus in Compost and Mold

Penicillium molds grow on citrus. Concerns arise about adding them to compost. However:

• Well-tended piles get too hot for mold survival. Penicillium prefers fridge-to-room temperatures; good compost piles run hotter.
• Commercial citrus has antimicrobial wax to prevent mold during storage. This wax is mild enough for human contact but prevents surface mold growth.

Mold is only problematic for homegrown citrus in passive/cool composting systems. Heating your pile eliminates mold concerns.