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The Spruce / Michelle Becker
Knowing what's safe to throw in your composting bin, and what should stay out, can be confusing. Here's a list to make it easy to compost, adapted from the EPA, Cornell University, and other composting experts.
What to Compost
- Animal manure from herbivores (not meat-eaters like dogs or cats)
- Cardboard rolls, cereal boxes, brown paper bags
- Clean paper
- Paper towels
- Coffee grounds and filters
- Cotton and wool rags
- Dryer and vacuum cleaner lint
- Crushed eggshells (but not eggs)
- Fireplace ashes
- Fruits and vegetables
- Grass clippings, yard trimmings
- Hair and fur
- Hay and straw
- Houseplants
- Leaves
- Nut shells
- Seaweed (rinse off saltwater)
- Shredded newspaper
- Tea and tea bags
- Wood chips, sawdust, toothpicks, burnt matches
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The Spruce / Michelle Becker
What NOT to Compost And Why
- Meat, fish, egg or poultry scraps (odor problems and pests)
- Dairy products (odor problems and pests)
- Fats, grease, lard or oils (odor problems and pests)
- Coal or charcoal ash (contains substances harmful to plants)
- Diseased or insect-ridden plants (diseases or insects might spread)
- Pet wastes (dog or cat feces, cat litter) (might contain parasites or germs)
- Yard trimmings treated with pesticides (might kill composting organisms)
- Black walnut tree leaves or twigs (substances harmful to plants)
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The Spruce / Michelle Becker
Remember that most composting experts advise a balance between green waste -- watery materials like fruits and vegetables, grass clippings and weeds -- and brown waste like dried leaves, sticks, fur, cloth, cardboard, and paper.