The Truth About Recycling Plastic Pots

Have you ever wondered what happens to all those plastic pots once we’re done with them? I was under the false impression that most were recycled. As it turns out, a large percentage of them join other single-use plastics in landfills. That’s according to Jean Ponzi, Green Resources Manager in the sustainability division of the Missouri Botanical Garden.

Years ago, Ponzi asked herself the very same question. What followed was the launch of the largest plastic pot recycling program of its kind. Since 1998, the Missouri Botanical Garden’s Plastic Pot Recycling Program (MOBOT) has saved over 300 tons of plastic from reaching area landfills.

The problem is that it has only made a small dent in the problem.


According to the EPA, in 2017, the U.S. produced 35.4 million tons of plastic. Of that, about 26.8 million tons, or 76 percent, went to landfills. This mean that, of all the plastic produced, only 8.5 percent was recycled.

Until recently, China bought most of our plastic waste and recycled it into new products. But in 2017, the country went from purchasing 60 percent of our plastic to 10 percent, drastically increasing the amount sent to our U.S. dumping grounds. This amount is now expected to double over the next two decades.


There’s no doubt that the black plastic pot changed the horticultural industry. It was easy to transport, lightweight and flexible. Plastic, in fact, was a game-changer for a wide range of household products. Containers are today one of the major products the plastic industry produces.

black plastic pots

Yet with all the convenience plastic containers represent, there is currently no national infrastructure for processing our plastic waste. And when it comes to black plastic pots, there’s an added dimension. Since they’re dyed with carbon inks that can’t easily be broken down, black plastic pots are non-recyclable. That makes them a single-use plastic, which takes around 450 years to break down.

Enter Marie Chieppo, Principal at EcoPlants Plans, and participant in the MOBOT program. She decided to dig deeper into what goes into recycling plastic pots and why the process is so difficult. What she discovered is revolutionary for we gardeners.


According to Chieppo, where it comes to recycling, all plastic pots pose a problem. Since they are derived from fossil fuel hydrocarbons, they are non-biodegradable. Further, in order to be able to be recycled, they must be:

DECONTAMINATED – that means all soil and debris must be removed from the container. Anything that stays in the pot wreaks havoc on recycling facilities by dulling the knives of the grinding machinery.

SEPARATED BY COLOR AND DENSITY – each of which can have an effect on how a pot can be recycled.

STACKED – this can be a nightmare because they’re all configured differently. Plus they take up a lot of room in the recycling bin.

ABLE TO BE RECYCLED – some can be reused, but most cannot (as in the case of black plastic pots), says Chieppo. For example, you can’t mix polymer types. That’s because there are three primary resins used in the manufacture of horticultural pots. And each is processed differently. 

roll-off container

The net result is that recycling plastic pots is a very expense and labor-intensive process.

‘The sad truth is that 95-98 percent of plastic horticultural pots end up in the landfill,’ says Chieppo.


So what can we gardeners do to mitigate the problem? Until a better plastic is developed, we can try our best to recycle. To do so, we need to educate ourselves first as to the process. For instance, we must never mix horticultural products with other plastics. 

Instead, we must first wash and disinfect our used plastic pots to kill any plant pathogens. Then we can put green, blue or red plastic pots out for recycling. But black plastic pots and trays must be put in the trash.

Or, you can take your used plastic pots (non-black) to places like Home Depot and Lowes, both of which have garden pot recycling programs.


Can anyone unseat plastic? Several manufacturers are trying. Some are now producing new pots out of ‘Bioplastics’ (a hybrid starches combined with petroleum). Other companies are manufacturing compostable pots, plantable pots and pots made from cow manure among other things. All of these alternatives can produce and grow plants as well as plastic ones.

Plantable pots are an option growing in popularity

But before we can begin making a dent in our plastics waste problem, companies will need to mass produce them. This process has yet to be developed. For now, the best way forward is to educate ourselves as to viable alternatives to plastic pots and to recycle the ones we do use appropriately. 

‘It’s not an Either/Or’, says Chieppo.



Gardening For Troubled Times

‘It was an uncertain spring.’ – Virginia Wolf, The Years

In times of trouble, I often turn to Voltaire’s Candide to help put things in perspective. In this classic satire, Candide and his companions undergo unspeakable hardships only to find themselves in the end alone, together. Faced with a new normal, Candide arrives at the only sensible conclusion.  “We must cultivate our garden,” he says. Continue reading

The Tiny Frog World of the Northern Spring Peeper

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Feed The Birds: 10 Plants With Great Winter Seedheads

Once flowers dry up in the vase, we tend to throw them in the garbage. But outdoors, it’s a whole different story. Not only do the seedheads of spent flowers bring beauty to the garden, but they also furnish food to hungry birds and wildlife. And those two reasons alone should cause us to think twice before we start cutting our plants back for the winter. Continue reading

How To Build The Perfect Monarch Butterfly Garden

monarch on pink flowers

Daniel Potter freely admits he’s not an expert on monarchs. But as Professor of Entomology at the University of Kentucky, he and his grad students sure love to run experiments. Recently, they completed a two-year study on the likes and dislikes of the popular orange and black butterfly. Now for the first time ever, there’s a roadmap for building the perfect monarch garden. Continue reading

The Seed Vault That May One Day Save The World


If our planet ever goes to ruin, it’s good to know there’s a place squirreling away the world’s seeds. Located deep inside a mountain just north of the Arctic Circle, it’s known as the Svalbard Global Seed Vault. Here in an icy chamber, duplicates of close to a million seeds are stored in the largest secure seed storage facility of its kind. Continue reading

The Difference Between Bees, Wasps and Hornets

What’s the difference between bees, wasps and hornets? You may be surprised to learn that some are masquerading as imposters. Take yellow jackets for instance, whose yellow and black stripes speak bee when in fact they are wasps. In the natural world, though, all three serve a purpose. So before you reach for the chemical spray, please see below. Continue reading

Nurturing Wildlife Habitats: Five Ways To Save the Planet

For many of us, attracting wildlife to our gardens sounds good in theory but fails in practice. Especially when it comes to that four-legged pest the white–tailed deer. However, there are many sound reasons for enticing birds, insects, even small animals back into our yards. It’s not only good for our local ecosystem, but it also keeps our flowers blooming. And it just might be the right thing to do. Continue reading

Seasonal Eating: The Best ‘Warming’ Foods To Try This Winter

cover garlic

Winter has its challenges if, like me, you’re looking for fresh produce. And that makes it hard to resist all those imported fruits and vegetables. Still, if you want to be in sync with your environment, eating foods that are in season has only upsides for the body. That’s why I look to Mother Nature, who provides for cold weather by producing some of the best ‘warming’ foods around. Continue reading

Nature’s Flu Remedy: Antiviral Anti-inflammatory Lemon

Now that flu season is here, most of us are searching for ways to stay healthy. For some, this means getting the flu shot, for others it means building an arsenal of home remedies. For many, it means a combination of both. However, sometimes it takes not more than opening your refrigerator to uncover one of the best flu fighters of all — the common lemon. Continue reading