DEN Sustainable Soils


We are so proud to partner with DEN Sustainable Soils! This is their Mission Statement:

We Source Locally.

We’re all too aware of the emissions generated in transport, so we source ingredients for our mixes from our neighbors right here in California.

Transportation is one of the United States’ largest carbon emitting sectors, and much of that transportation comes from shipping goods and materials. Den Soils’ ingredients are hyper local, sourced within 500 miles of our headquarters in the bay area.

We use sequestered carbon from organic waste in all of our mixes.

A whopping 15% of the carbon emissions generated in the United States in 2018 came from organic waste breaking down in landfills. OurCarbon™ puts a stop to it.

We put a big serving of sequestered carbon to support the health of your plant and our planet in each of our mixes in the form of OurCarbon™ biochar. OurCarbon™ is a material made from organic waste diverted from landfill and transformed into a soil microbe dream home all in a net zero energy process.

We’re Peat Moss Free

Turns out this ubiquitous natural potting medium is responsible for huge carbon emissions.

It’s not just what we put in our soils that make us sustainable, it’s also what we keep out. Peat bogs are the largest natural carbon sink for our planet, storing 550 gigatonnes of greenhouse gases (more carbon than our forests) under a thin layer of moss. When we harvest peat moss from our peat bogs we tear holes in this layer, releasing an enormous amount of carbon dioxide into the atmosphere that keeps releasing until the hole grows back together. The emissions related to peat mining is estimated to amount to 1.3 gigatonnes of CO2 annually, or the equivalent of the CO2 produced by every building on earth in 2018.


Instead of Peat Moss in our mixes, we use a waste material from local, FSC certified sustainable logging companies called Fir Bark. This material serves the same function of holding moisture in our soil, but without the greenhouse gas emissions.

We reject synthetic fertilizers

When did it become normal to see little colored balls in your soil?

As much as we love not having rain, insects, fungus, or other aspects of an outdoor ecosystem in our homes, it does mean that our potted plants need soil with extra fertilizers in them. But there is no reason these have to be synthetic.

Whether burning natural gas for nitrogen, mining rocks like phosphate for phosphorous, or using caustic salts to isolate potassium from potash, any synthetic fertilizer is nonrenewable and carries a heavy carbon footprint.

Den’s fertilizing blend uses naturally found materials with as light a carbon footprint as we can manage. We even use plants like kelp to provide potassium, an example of an ingredient that sequesters carbon as it is produced instead of emitting it! And all of our ingredients release slowly over time naturally, so little colored balls need not apply.

All of our packaging is plastic free and biodegradable.

We consider where all of the materials we use come from, and where they’ll end up.

Our packaging comes in two forms: a paper bag and a cardboard tube. Our paper bags are made with SFI (a nonprofit focused on sustainable forest management) certified paper and lined with a plastic-free, bio-based liner that will break down in a backyard compost environment. Our tube is 100% plastic free and is labeled with a compostable label made from sugarcane fibers. You could compost our tubes, but we feel they’d do best reused in our home or recycled first!

We offset our shipping.

Every emission generated by shipping DEN products to your door is offset through an organization called South Pole.

The projects underway for 2020 include native forest regeneration in Australia and reforestation in the lower Mississippi river area in the US.


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