KIS Organics Biochar Soil Mix

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  • Regular price $ 40.00
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KiS Organics Biochar Soil Mix is is our premium soil. It offers all the rewards of our Water Only soil with the added benefit of Biochar at 8% of total media. Biochar raises carbon levels and CEC (ability of the soil to retain nutrients), provides habitat for beneficial microorganisms, increases water hold capacity, and much more. This mix is designed for heavy feeding crops and the biochar really shines in hot dry climates for moisture control as well as microbial enhancements.

100% natural and organic ingredients, no synthetic chemicals.

Here at KiS, we have made the extra steps to register our soil as fertilizer due to the high level of fertility we have added to the mix.  Our Biochar Soil Mix is registered for organic use in organic production with CDFA, Oregon Tilth and Certified KIND.

We have taken a lot of time, research and lab testing to perfect our soil mixes from the beginning. We use high quality amendments that work together to create balanced, nutrient dense, biologically active and diverse soil mixes.   Our soils have a high ratio of ingredients compared to all the other soils on the market and all our mixes are ready to use. 

The unique combination of minerals and biochar and our manipulation of pH have allowed our growers to pass all heavy metal testing in numerous states since the original formulation of our recipe.  Any heavy metals present in the formulation have been tested and proven to be relatively unavailable to the plant.

Bottled nutrients are not required and there is no need to worry about burning your plants - just plant and water until next harvest.  This soil mix has all the beneficial biology, nutrients, and minerals your plant needs to be happy and healthy for up to 6 months.

Additional advantages of our soil mix:

  • We use lab and microscope tested compost and peat to ensure good biological activity.
  • We inoculate our soil mix with additional microorganisms to further increase microbial life and nutrient cycling.
  • No need for further nutrients or fertilizer, saving you tons of money! That being said, we do have an advanced nutrient schedule available on our blog (click here).
  • Can be reused over and over again, with only small amendments between cycles. We have tested and re-amended the soil up to 5 years in indoor beds.
  • Can be used indoors or outdoors, though keep in mind that this soil is alive and there will be some insects and other small organisms in the soil. This is necessary to maintain a healthy soil food web and achieve proper nutrient cycling. You don’t want a sterile soil for organic gardening/growing!


Black Owl Biochar, Spaghnum Peat Moss, Oly Mountain Fish Compost, Earthworm Castings,  Volcanic Pumice, KIS Organics Microbe Catalyst, Glacial Rock Dust, Basalt, Calphos Soft Rock Phosphate, Oyster Shell Powder, Organic Alfalfa Meal, Organic Fish Bone Meal, Organic Crustacean Meal, Kelp Meal (ascophyllum nodosum), Neem Cake, Karanja Cake, Organic Fish Meal, Organic Feather Meal, Organic Steamed Bone Meal, Natural Calcite, Ag Lime, Mycorrhiza*, and Beneficial Microbes.

Benefits of these ingredients can be found HERE

To read more about biochar, visit

*Not to be considered as a full mycorrhizal application, a separate inoculation of the proper mycorrhiza is recommended, depending on your plant.


We recommend a minimum of 7 gallon containers for maximum benefit on a full cycle plant.

For indoor growing environments, use 60-90 gallons of soil per light. 

Water frequently to keep the soil evenly moist.  For best results, keep soil near field capacity.  To test the soil, take a handful and squeeze it firmly.  If only a drop of two of water comes out, then the soil is near capacity.

When using a moisture meter aim for 80-120 mbar; for best results use Tropf Blumat irrigation.

If you wish to add additional nutrients, please refer to the rest of our product line or use other nutrients at 1/4 of their recommended rate.

NOTE: If growing a larger plant in a small container, you will need to top dress weekly with our KiS Organics Nutrient Pack to achieve optimal plant growth.


All our soil mixes are available in bulk.  Minimum bulk order is 1 cubic yard and we offer discounts on larger quantity orders. 

Bulk pricing is available HERE

Please note that bulk orders cannot be purchased via the shopping cart.  Please fill in the Bulk Order Form with your details and a member of our team will get back to you with a personalized quote.


Due to high shipping costs to some parts of the US (due to the weight of the soil), we also offer our Nutrient pack for those who prefer to make their own organic living soil using locally sourced inputs.

Pick up is available at a selection of local WA locations. These orders will need to be fulfilled with us directly.  Please call 425.558.0990 or email with any inquiries, to process your payment and book an in-person appointment.  


KiS Biochar Soil Mix Heavy Metal Report can be found HERE

KiS Biochar Soil Mix MSDS  can be found HERE

7 Important Things When Building a Living Soil

The Economics of 'Water Only' Soils

A Comparison of Living Soil Methodologies in Relation to Plant Health and Yield in a Controlled Environment for Cannabis

A Cost Analysis of KiS Organics Soil Over A 3 Year Period

Cannabis Cultivation & Science Podcast: Episode 14 - All About Biochar with Renel Anderson

Cannabis Cultivation & Science Podcast: Episode 78 - Benefits and Uses for Biochar with Tom Miles

Customer Reviews

Based on 35 reviews Write a review

Customer Reviews
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United States

The Best!

Every KIS product is amazing and the service is excellent. The Biochar Mix is a superior product.

Russell M.
United States United States

Biochar water only

Product is great. Only giving 3 stars because the price of shipping

John M.
United States United States

Kis Organics bio char soil mix simply amazing

I would Highly recommendrecommend this amazing soil to anybody Who wants to fill a container and grow with confidence and success. keep it simple is the name of the game !!! It performs better than any other soil I have ever used hands-down! It exceeded my expectations and I grew some of the most beautiful plants I’ve ever grown. It also seems to improve the vigor and health of all my plants growing in it.

United States United States

Worth the Cost of Shipping

Like the title says, shipping it to me is more expensive than the soil. But, the soil is the best I’ve ever grown in.

United States United States

Best Soil Around

Had great results using this soil mix. Just by the feel and smell of the stuff you can tell it’s high quality. I wish the shipping wasn’t so expensive, but my plants love it and they’re a great company. Highly recommend trying it out.