Newspaper is compostable, but only certain types and with conditions

Most newspaper can go into your compost pile, but not all of it. Standard black-and-white newsprint breaks down readily because it is made from wood pulp with minimal chemical treatment. Glossy newspaper inserts, colored sections, and papers printed with heavy inks may contain substances that slow decomposition or leave residue in finished compost. The safest approach is to shred the newspaper first, wet it down, and mix it with brown materials like leaves or wood chips rather than layering it whole.

The key variable is ink type. Newspapers printed with soy-based or vegetable-based inks decompose without issue. Many U.S. newspapers switched to these inks in the 1990s to reduce toxins. However, some regional papers and older stock may still use petroleum-based inks, which break down more slowly and can leave traces in your finished compost. If you are unsure what your local paper uses, contact the publisher directly or stick to black-and-white pages only.

Key Takeaways

  • Black-and-white newsprint decomposes in a standard compost pile within three to six months when shredded and mixed with other materials.
  • Glossy inserts, colored pages, and heavily inked sections should be removed or composted separately because they break down slowly and may contain problematic residues.
  • Shredding newspaper before adding it prevents matting, which blocks air and water from reaching the center of the pile.
  • Newspaper works best as a brown (carbon-rich) material and should be balanced with green materials like food scraps or grass clippings to maintain proper decomposition.

Why newspaper matters in compost

Newspaper serves as a brown material in compost, meaning it is carbon-rich and helps balance the nitrogen from food scraps and yard waste. Without enough brown material, your pile becomes wet and slow to break down. Shredded newspaper is particularly useful because it takes up less space than whole sheets and mixes more evenly with other materials.

The decomposition timeline depends on how you prepare it. Whole sheets of newspaper can take six months to a year to fully break down because they mat together and exclude oxygen. Shredded newspaper in a well-maintained pile (turned regularly, kept moist, and layered with greens) can disappear in three to four months. The finer you shred it, the faster microorganisms can access and break down the fibers.

Which newspaper sections to avoid

Glossy inserts—the slick magazine-style pages in Sunday papers—should not go in your compost. These are coated with clay or plastic-based finishes that resist decomposition and can persist in your finished compost for years. Similarly, colored newspaper sections (comics, advertisements with heavy color printing) often use inks that break down slowly or contain heavy metals in older papers.

Newspaper with a waxy or plastic coating should also be removed. Some papers use a thin plastic layer to prevent ink transfer or improve durability. These coatings do not decompose and will end up as fragments in your finished compost. When in doubt, test a small amount in a separate pile for a few months to see how it breaks down before adding large quantities.

How to prepare newspaper for composting

Shredding is the single most important step. Run newspaper through a paper shredder, tear it by hand into strips roughly one to two inches wide, or cut it with scissors. Smaller pieces expose more surface area to microorganisms and prevent the dense mats that form when whole sheets are stacked.

After shredding, wet the newspaper lightly before adding it to your pile. Dry paper repels water and can create a barrier that keeps moisture from penetrating. A quick spray from a hose or a dip in water is enough. Then layer the wet shreds with green materials—food scraps, grass clippings, or plant trimmings—in a ratio of roughly two to three parts brown to one part green by volume. This balance keeps the pile warm and active.

Newspaper in different composting systems

In a traditional outdoor pile or bin, shredded newspaper works well mixed throughout. Avoid creating thick layers of newspaper alone, as these will compact and slow decomposition. Instead, alternate thin layers of shredded paper with green materials as you build the pile.

In a tumbler or enclosed bin, newspaper breaks down faster because the system is turned regularly and retains heat and moisture. You can use slightly larger pieces here because the tumbling action breaks them apart. In a vermicomposting system (worm bin), shredded newspaper is ideal as bedding material, though you should use only black-and-white pages and avoid glossy sections entirely, as worms are sensitive to certain inks and coatings.

What happens to newspaper in finished compost

Well-prepared newspaper (shredded, black-and-white, soy-based ink) breaks down completely into humus and is invisible in finished compost. You will not see fragments or residue if the decomposition was thorough. Glossy or heavily inked newspaper, by contrast, may leave visible flecks or fragments even after months in the pile.

If you are making compost for a vegetable garden or food crops, using only plain newsprint is the safest choice. If you are composting for ornamental plants or landscaping, small amounts of colored newspaper are unlikely to cause problems, though they will take longer to disappear. Test your finished compost by spreading a thin layer on a plant bed and observing whether fragments remain visible after a few weeks of weathering.

Alternatives to composting newspaper

If you have large quantities of newspaper and limited compost space, consider other uses. Shredded newspaper makes excellent mulch around garden beds—it suppresses weeds, retains soil moisture, and breaks down over time. Lay it two to three inches thick and cover with wood chips or leaves so it does not blow away. You can also use newspaper as a weed barrier under mulch or in garden pathways.

Many communities accept newspaper in curbside recycling programs, which is often the better choice for glossy inserts and colored sections. Check your local program's guidelines, as some accept only black-and-white newsprint while others take all newspaper. Recycling keeps these materials out of landfills and reduces the need to source new paper fiber.

Frequently Asked Questions

Can I compost newspaper with color printing or advertisements?

Black-and-white newspaper decomposes reliably. Colored sections and advertisements break down more slowly and may leave visible fragments in finished compost. For food gardens, stick to plain newsprint. For ornamental use, small amounts of colored newspaper are acceptable but will take longer to disappear.

Do I need to remove the ink before composting newspaper?

No. Modern newspaper inks (soy-based or vegetable-based) are designed to break down during composting. You do not need to wash or treat the paper. Older papers or those printed with petroleum-based inks decompose more slowly, but removal is not practical—recycling is the better option for those.

Will newspaper make my compost smell bad?

Newspaper itself does not cause odor. Odor in compost comes from too much nitrogen (green material) or poor aeration. If your pile smells, the newspaper is not the cause. Add more brown material (including shredded newspaper) and turn the pile to introduce oxygen.

How much newspaper can I add to my compost pile?

Newspaper should make up roughly 25 to 40 percent of your pile by volume, balanced with green materials. Adding too much newspaper slows decomposition because the pile becomes too dry and carbon-heavy. If you have large quantities, use some for mulch or recycling instead.

Can I compost newspaper from magazines or junk mail?

Magazines and junk mail are usually printed on glossy paper with heavy coatings and inks that do not decompose well. Recycle these instead. Standard newspaper is the best choice for composting.