What Happens if You Add Old Newspapers to Your Garden

Old newspapers spread under mulch will smother weeds, hold moisture in the soil, and slowly feed your worms a steady diet of carbon as the paper rots down.

That sounds like a clean win, and for the most part it is, but only if you know which pages to pull and which to leave in the recycling bin.

Done correctly, a few sheets of yesterday’s news can do the job of landscape fabric without leaving plastic in your soil.

Done carelessly, you can introduce inks and coatings into your beds that you would not want anywhere near food.

I have used this trick for three growing seasons across two rented yards.

Here is what actually happens, what the science says, and the part most blogs skip past.

The Short Answer, If You’re in a Hurry

Layer four to six pages of plain black-and-white newsprint over weeded soil, wet it down, and cover it with about two inches of organic mulch like straw, wood chips, or shredded leaves.

Within eight to twelve weeks the paper will break down into the soil and feed earthworms in the process.

Avoid glossy inserts, colored advertising pages, magazines, receipt paper, and anything with a wax or plastic coating. Those are the pages that can leave behind chemicals you should not be growing food in.

That is the whole technique.

The rest of this post is the why, the science, and the small details that decide whether the trick works for you or quietly fails.

Why Newspaper Works as a Garden Mulch

Sunlight is what most weed seeds need to germinate. Cover the soil with something opaque and even tough perennial weeds give up after a few weeks of starvation.

Cardboard does this. Black plastic does this.

Old newspapers do it too, with the added bonus that they decompose into carbon and feed the soil food web on their way out.

The Brooklyn Botanic Garden has been using newspaper as a weed-suppressing mulch in its Fragrance and Shakespeare gardens for years, recommending a layer of about five pages topped with soil. Their horticulturists also use it to stop spreading plants like mint and lemon balm from running into beds they were not invited to.

The other thing newspaper does is hold moisture. A wet layer of paper acts as a kind of slow-release sponge, keeping the topsoil from drying out between watering sessions.

Newsprint is also extremely high in carbon.

The University of California’s composting data lists newspaper at roughly 40 percent carbon and just 0.1 percent nitrogen, which makes it one of the most carbon-dense “browns” you can add to a compost pile or sheet mulch.

What’s Actually in the Ink Today

This is where most worry about newspaper in the garden comes from, and most of that worry is about thirty years out of date.

Until the late 1980s, newspaper printers leaned heavily on petroleum-based inks, some of which contained heavy metals like lead. Spreading those across a vegetable bed was a fair thing to be nervous about.

Then the 1973 oil crisis happened, the Newspaper Association of America went looking for alternatives, and in 1987 The Gazette in Cedar Rapids, Iowa became the first paper in the country to print a commercial run using ink made from soybean oil. The switch caught on fast.

Today, more than 90 percent of daily newspapers in the United States print color pages with soy-based inks, according to the American Soybean Association. Black ink for body copy is similarly biological in origin at most major papers.

Soy inks are non-toxic, biodegradable, and break down into harmless fatty acids in the soil as the paper rots.

There is a reason permaculture teachers stopped warning about newspaper inks roughly two decades ago.

If you want to be sure, ring up your local paper and ask which inks they use.

The very-cautious version is to skip newsprint entirely and use plain cardboard or straw instead. Both are valid choices.

The Kinds of Paper That Do Not Belong in Your Beds

Not all paper is created the same way, and a few categories are worth keeping out of a food garden no matter what.

Glossy Inserts and Colored Ads

The shiny supplements that fall out of the Sunday paper are not printed the same way the news pages are.

Many use heatset inks on coated stock, and some still carry pigments with heavier metals than the soy-based black ink in the main paper.

The USDA National Organic Program is explicit on this point. Rule 205.601 allows newspaper as a mulch and compost feedstock for certified organic operations, but specifically excludes glossy paper and colored inks.

If it is good enough for organic certifiers, it is a fair line to draw at home too.

Receipt Paper, Magazines, and Anything Coated

Thermal receipt paper is treated with chemicals you do not want in soil, and many magazines use heavier inks plus a clay-based gloss coating. None of these break down cleanly.

A simple rule helps here. If it feels slick under your thumb, if the color bleeds when you splash water on it, or if it has a plastic shine to it, it does not go in the bed.

How to Lay Newspaper Down Properly

This is mostly common sense, but the small things matter.

Start by clearing the area of any seeding weeds. Newspaper will smother almost anything, but if you skip this step you will have weed seeds waiting to spring up in next year’s mulch.

Wet the soil first, then lay down four to six sheets of plain newspaper, overlapping each section by a few inches so no gaps open up when the paper dries. Around established plants, keep the paper about an inch or two off the stem to avoid trapping moisture against the bark.

Spray the paper with water as you go. Wet newsprint will not blow around while you are still working, and the moisture starts the decomposition process right away.

Cover everything with at least two inches of organic mulch on top. Straw, shredded leaves, wood chips, and pine bark all work.

The mulch holds the paper in place, hides the slightly ugly newsprint, and lets rain pass through to the soil.

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Newspaper in Your Compost Bin

Shredded newsprint is also one of the most useful materials you can drop into a home compost pile.

Cornell University’s composting research puts the ideal carbon-to-nitrogen ratio for a hot compost pile at 25 to 30 parts carbon for every 1 part nitrogen. Kitchen scraps and grass clippings sit way down at the nitrogen-heavy end, which is exactly why so many home bins go slimy and start to smell.

Newspaper is the cheap, easy fix. Tear it into strips, drop it in by the handful, and the C:N math works itself out.

A few practical notes.

Wet the paper before adding it or it will mat together and stop air from moving through the pile. Keep newsprint below about 25 percent of the pile by volume, since too much carbon will slow everything down.

And again, no glossy or colored stock.

A Side Note for the Skeptical Gardener

If you are still uneasy about ink residues, there is a perfectly reasonable alternative. Plain brown kraft paper, the kind grocery store bags are made from, has no ink at all.

So does unprinted cardboard, though it is slower to break down.

The Vegan Week ran a similar reality check on the copper wire trick that has been floating around gardening TikTok, and the lesson there applies here too. The point is not to grab every clever-looking tip, but to understand the mechanism so you can tell the trick from the gimmick.

Newspaper works because of physics and biology, not magic.

Once you know the science, you can stop second-guessing it.

What I Have Learned After Three Seasons of Doing This

In my own beds, the biggest change has been how little time I spend weeding now.

Setting aside an afternoon in early spring to lay paper and mulch saves me what used to be a whole summer of pulling crabgrass out of the tomatoes.

The second thing I noticed is that the soil under the paper looks different. A year in, what was tired, compacted clay had earthworm tunnels through it and a dark, crumbly texture I had been trying to buy at the garden center for years.

There is something quietly satisfying about the loop too.

The paper that delivered the morning’s headlines becomes mulch in May, becomes worm food in August, and becomes the carrots I am eating in October.

That kind of closed circle is, in a small way, what plant-based living tries to do at the dinner table. Take less, return more, and notice what your choices are made of.

If you have been curious about that idea but unsure where to begin, our gentle beginner guide to going vegan is a kind place to start.

Either way, before you toss this week’s paper, consider sending it out to the garden instead. Your weeds will hate it. Your worms will love it. And your soil will thank you in a way the recycling bin never could.