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Horticultural Charcoal COARSE - BioLeaf HortiChar - 1 Litre

$13.99 NZD

If you're looking for a finer grade charcoal have a look at KiwiChar BioChar >

HortiChar is horticultural charcoal. This is the coarse grade. Being a natural product the size of the charcoal chips varies quite a bit in the bag, but the larger chunks average 1.5cms to 2cms. You'll find a mix of fine to chunky size chips due to the nature of charcoal, so expect some fines and smaller grit size pieces in the mix. This 1 litre bag is the recommended amount to create 5 litres of DIY potting mix, based on a 20% ratio (see below for how much to use), or 10 litres based on a 10% ratio. See below for how much to use. Also available in 500mls >

How much charcoal should be added to potting mix?

Horticultural charcoal is a popular additive when creating your own custom potting mix blend. How much you add depends on the grade. The finer grade charcoal (like BioChar), should make up about 5% of your entire mix. I normally aim for 2% myself, which is about 250mls of fine grade as part of 5 litres of potting mix. A chunkier or coarser grade can make up as much as 20% of your final mix (I usually go for around 10% for mine). To make 5 litres of potting mix you might like to include 500mls to 1L of coarse charcoal as one part of making 5 litres of potting mix.  

What are the benefits of charcoal for plants?


The coarser grade helps keep water moving down and out of the pot, and the irregular shape and highly porous nature of charcoal increases air space in the mix, reducing the risk of diseases that prefer low-oxygen environments, such as root rot.


Charcoal is naturally anti-microbial, with a high capacity to absorb impurities and toxins from the soil including harmful bacterial and fungi such as root rot. This is called keeping your soil 'sweet'. In closed environments without drainage, like terrariums and pots without drainage holes, charcoal is used to help keep harmful pathogens to a minimum. 


Charcoal retains the nutrients plants need to fuel growth, increasing nutrient availability when roots need it, improving soil fertility to help grow healthier plants. Being highly porous it's also a great home for beneficial soil microorganisms which also helps boost soil and plant health. 

Safety first

Exactly the same as you should with all substrates, including potting soil and soil amendments: When handling charcoal, wear gloves and wear a mask then wash your hands after potting up. Charcoal can be dusty, so wearing a mask is recommended. It's ideal to dampen charcoal and keep it moist when working with it.  

Please note

500mls is a volume measurement at the time of packing, not based on weight, and contents may settle over time.


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 is FREE for all orders $90+. Orders under $90: Auckland Standard $5, signature required $7, or rural $9. Rest of the North Island and the South Island: Standard $7, signature required $9, or rural $11. Plants, fragile and overweight/oversize parcels have separate rates. 


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Normal delivery is 1 to 3 working days. Rural and some regions can take a day or 2 longer, depending on where you're based (orders ship from Auckland). 

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"I can’t recommend love that leaf highly enough. I’ve bought a couple of times so far and on both occasions Anna has been more helpful than I could possibly wish for. 5 stars! Don’t hesitate to order from Love That Leaf. Excellent service and super fast delivery." Rob Gordon

Why choose to buy from Love That Leaf?


When you buy from me you're supporting a small, local, family business. Love That Leaf is a registered NZ business, based in Auckland. 


You'll get your planty goodies super fast. Everything showing in stock on the website is right here in NZ, in stock, ready to ship. I ship daily, Monday to Friday. Orders normally leave the courier the same or next working day. Zoom zoom!


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"Super impressed with this business. Something that is lost nowadays, is customer service. This however is not the case with Anna from Love that Leaf. Very happy with my purchase, very happy with the product information provided and very happy with the quick shipping and great packaging. Thanks!" Melayna Anderson

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