The problem! Poor yields from hard soil, clay soil, sandy soil, or toxic soil.

The Solution: Adding biochar helps plants grow.

NH Biochar image of a 1 Cubic Foot bag

Biochar preserves nutrients, saves water and fertilizer, improves compost, improves soil structure and fertility.  Biochar revitalizes poor soils and encourages microbes.  Biochar is long lasting and carbon negative.  Biochar is a special charcoal made by heating biomass in the absense of oxygen.  Our biochar is made in New England from wood chips.  The excess energy is captured for electricity production.  

Hydroponics: Use biochar with coco coir and other planting media. Trials with medical cannabis production show greater pH stability, more robust growth and leaf-tip nutrient burn reduction.


Use biochar in the root zone of your plants.  Mix well with soil to avoid losses from wind and water erosion.  It may take two growing seasons to fully realize the beneficial effects of biochar.

Helpful Tips:

Speed up the effects of biochar by mixing it with compost  tea, mycorrhizae, or compost before use.    Apply in a ratio of approx. 4% to 10%.  (Apply 1/4“ of biochar to 6” of soil depth) and water well. 

New Hampshire Biochar helps soils retain nutrients and water.  Plants and vegetables have a greater chance for strong growth that produces nutrient rich food.  If used agriculturally, or on laws, it can prevent nutrient runoff into rivers and streams.  Biochar binds nitrogen so emissions of nitrous oxide (a potent greenhouse gas) are also reduced.  Turning waste biomass into biochar also reduces methane, (another potent greenhouse gas) generated by the natural decomposition of the wast.  Between 20% and 40% of the carbon in the original biomass is locked up in the soil for thousands of years, helping to slow down climate change.


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NH Biochar 5 Gallon (20 Qt) Bag


 You know The Problem!

A stinky, smelly, nasty outhouse, privy or composing toilet with the flies just a buzzin.A Smelly Outhouse


If the outhouse smells bad sprinkle about a quart of Happy Hopper on top of the pile.  Then after each use sprinkle on about a cup.  You should notice a big difference in the smell by the next day.  For a composting toilet; replace 25% of your bulking agent with biochar.

Cow with non stinky manure

Happy Hopper Biochar Solution

  • Tames the odor of your humanure and controls odors better than lime.
  • Makes clean-out and maintenance much more fun.
  • Discourages flies
  • Happy Hopper is alkaline, to raise the pH in your toilet, and to aid decomposition and discourage microbes that produce unpleasant odors.
  • It increases the biomass and biodiversity of the good microbes that breakdown waste.
  • Biochar is long lasting (as in thousands of years) and carbon negative.

A word to the Wise

Never ever put food down an outhouse.  We heard of a startling encounter between a visitor’s behind and a bear’s nose at Mt. Katahdin State Park because someone put food down and the bear got inside the pit somehow.   There was some screaming. We are not making this up 

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 Composting Toilet Tips

Composting toilets are different than most outhouses, privies and pit toilets because the decomposition is  aerobic (uses air).  Composting toilets require a bulking agent to absorb excess moisture and a carbon source like sawdust or peat moss.  Sometimes the chemistry in a composting toilet can be out of balance causing unpleasant odors.  Biochar absorbs moisture and odors, makes the waste less acid and more alkaline,  and increases the biomass and biodiversity of the good microbes that breakdown waste.

The carbon in biochar will not react with the waste nitrogen, so you will still need to use some high-carbon bulking agent like sawdust.  (sawdust is more sustainable than peat moss) Biochar will also preserve the nutrients in your compost so they are not lost to the air or leached away when you remove it.

The problem! Calcium deficiencies  and nutrient leaf-tip-burn.


The Solution: Micronized + low pH + Calcium

Onyx Biochar 5 quart bag image

Onyx Biochar Seed and Clone Mix for cannabis cultivation was developed especially for use with coco coir and other growing media.  Developed in conjunction with a commercial medical marijuana cultivator to combat calcium deficiencies  and nutrient leaf-tip-burn. Unlike most biochars this product has a modified pH in the ideal range for cannabis cultivation.  The extremely fine grind provides high surface area and greater penetration and uniform mixing in growing media like coco coir.

Micronized for use with coco coir, starting cubes, rock wool, soil, and other media ·  Stabilizes pH in growing media

  • Helps prevent nutrient leaf-tip burn
  • Saves water and fertilizer
  • Reduce calcium deficiencies
  • Improves Cation Exchange Capacity
  • Improves yield

Ingredients: recycled biochar from wood chips,  Calcium (from Calcium Sulfate).  H3PO4 added to control pH.  pH 6.0 to 6.8


Apply between 4 and 10% of biochar by volume.  For 1 cubic foot of hydrated media you need between 1,133 liters (for 4%) to 2.831 liters (for 10%) of biochar. For dehydrated media: such as coir brick that expands to 1 cubic foot, add between 1.1 liters and 2.8 liters of biochar to the amount of water  recommended by the coir manufacturer and stir well.  This is usually 5 gallons.  Place the brick in the water containing the biochar.  Allow the coir to fully expand and mix by hand until all the lumps disappear.

Helpful Tips:

For moist media: add the dry biochar  a little at a time and mix thoroughly.  For starter cubes:  measure the total volume of your cubes.   Mix between 40 and 100 ml char to 1 liter of water.  Soak cubes until water is absorbed.


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Onyx 1 Biochar Seed/Clone Mix - 5 Qt Bag 

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