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Charlie Charcoal Biochar- 25L - Large Item

Local Pickup - Perth Metro Store

High Quality Charcoal/Biochar Soil Amendment

Charlie Charcoal™ is a high quality horticultural charcoal/biochar that is of great benefit in sandy soils.  As a permanent source of carbon, charcoal acts as a sponge to hold onto water and nutrients (having a high cation exchange capacity or CEC) and has a very large surface area - making it an ideal home for millions of beneficial soil microbes.

Charlie Charcoal™ is quite unique among biochars as it has a very low pH, so will be hugely beneficial to people in coastal regions that struggle in limestone/sandy soil; and it also means that Charlie Charcoal™ is a great addition to pots and planters where you are wanting to grow acid loving plants (eg. azaleas, camellias, blueberries, gardenias).

Shipping Request

Due to the shipping cost, this product can only be ordered online as a Click & Collect order for pickup in our Perth retail store in Victoria Park.

If you would like to have this product shipped to you, please submit your name, postcode, and relevant details to receive an emailed response from our team.

Thank You! 🌱

More Details

Key benefits of using Charlie Charcoal in your soil are:

  • Lowers pH of alkaline soils which improves mineral uptake by plants
  • Increases nutrient holding capacity in the root zone.
  • Supports soil microbial activity which help feed your plants.
  • Provides high level of silicon which improves plant disease resistance
  • Provides high levels of iron which combats iron deficiency and leaf chlorosis.
  • Low phosphorus levels make it safe for use on native plants.
  • An excellent addition to compost bins and can reduce smells.
  • Improves wet-ability and water holding capacity in sandy soils
  • Increases soil organic matter and carbon levels on a permanent basis.
  • Improves paramagnetism

25 litre bag

Charlie Charcoal™ Analysis:

• Cation Exchange Capacity: 24
• Paramagnetism: 750
• Organic matter content 96%
• Conductivity (1:5 water) 0.057 mS/cm
• High silicon content 161 ppm
• High iron content 182 ppm
• Low phosphorus 13 ppm

Charlie Charcoal Application Rates:

• A minimum of 2-5 lts / m² is recommended. Apply higher rates on sandy soils (up to 10lts/m2).
• Turn into the top 100 mm of soil.
• Add between 10% by volume to potting mixes
• Add up to 40% by volume when a low pH growing medium is required.
• Add up to 10% by volume when making compost to support microbial activity
• Charlie Charcoal™ is a perfect accompaniment to Rocky Rock Dust™


Charlie Charcoal™ is non-toxic and safe to use for all plants. It is Certified Organic. The use of a dust mask is recommended when this product is dry as fine dust particles may become airborne.
Charlie Charcoal™ should not be applied where a source of ignition could ignite a high concentration of airborne particles.

Top Tip

We can also supply beneficial microbes to inoculate Charlie Charcoal™ before using it in your soil. Super charge it by adding liquid nutrients like kelp or fish hydrolysate  - mix the nutrient liquid with a bucket of water, tip 5 litres of the liquid into a bucket of Charlie Charcoal™ and leave for a few hours before applying. (Think of charcoal as a sponge with billions of tiny holes to fill, so nutrient charging your Charlie Charcoal™ will give you great results in your garden much sooner.)

Made in Perth, Australia.

Due to its weight, this product is only available in our Perth Eco and Garden Store for in store purchase or Click n Collect.

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