One of the most common questions about composting is also the simplest: what can actually go in? The answer depends a little on whether you compost at home or use a service, but the fundamentals are the same. The EPA groups compostable material into nitrogen-rich greens and carbon-rich browns.

Greens (nitrogen-rich)

  • Fruit and vegetable scraps
  • Coffee grounds and paper filters
  • Tea leaves
  • Fresh grass clippings and plant trimmings

Browns (carbon-rich)

  • Dry leaves
  • Shredded paper and cardboard
  • Untreated wood chips and sawdust
  • Paper towels and napkins

What to leave out of a backyard pile

Home piles usually do best without meat, dairy, and oily foods, which can attract pests and slow things down. Never add plastic, glass, metal, or anything treated with chemicals. One advantage of a service like Torus is that our processing partner can accept a wider range of food waste than a typical backyard bin. See our full acceptable food waste list for exactly what we take.

Backyard piles and pickup programs have different rules

This distinction prevents a lot of confusion. A small backyard pile may never become hot enough to break down bones, dairy, meat, or certified compostable serviceware. A commercial facility can use controlled temperatures and specialized equipment, so its accepted list may be broader. Always follow the rules for the place that will actually process your scraps. A label that says “compostable” does not automatically mean an item belongs in every bin.

How to prepare food scraps

Remove produce stickers, rubber bands, twist ties, and packaging before collection. Chopping large pieces is optional, although smaller pieces break down faster in a home pile. Drain excess liquid from soups and sauces so a countertop container stays manageable. If pickup day is several days away, a tight lid or a freezer container can keep odors and fruit flies under control.

Contamination matters more than perfect sorting

One plastic fork can survive the entire composting process and end up in the final material. When you are uncertain, leave the item out and check the program’s list. The EPA emphasizes reducing contamination because clean organics are easier to process and produce a more useful end product. Food itself is rarely the problem; hidden packaging is.

A practical kitchen setup

Keep the collection point close to where scraps are made. A small pail beside the cutting board works for daily prep, while a larger sealed bucket can stay in a garage, utility room, or shaded outdoor space. Households usually succeed when the system is obvious enough that nobody has to stop and think about it.

The easy option

If sorting greens and browns feels like a lot, a pickup service handles the details for you. Learn what Torus is and how our free service works, then sign up.