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The Beet: A Podcast For Plant Lovers

What Is Biochar? Charcoal In Gardening

The Beet: A Podcast For Plant Lovers

Epic Gardening

Education, Home & Garden, How To, Leisure

4.81.6K Ratings

🗓️ 19 September 2019

⏱️ 7 minutes

🧾️ Download transcript

Summary

What is biochar and how do you use it in the garden? That's the topic for today, so buckle in!

Learn More: What Is Biochar? Charcoal In Gardening

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Transcript

Click on a timestamp to play from that location

0:00.0

What's up everyone? Welcome back to the podcast. Today we're going to be talking about biochar and its uses or potential misuses in the garden. So we're going to talk about what it is and what is it supposed to do.

0:13.2

So in its purest form, biochar is pyrolyzed organic material.

0:19.0

So pyrolysis is a form of thermal decomposition in a low oxygen environment, which means extreme heat and low

0:27.3

air flow that prevents the material from catching fire. Instead, it charrs kind of like charcoal right so there are benefits and there are

0:35.3

drawbacks to using biochar in the garden the first thing that we're going to do

0:39.8

is discuss the different types then we'll go into more detail and potentially how to use it.

0:46.4

Okay, first the types. In and of itself, charcoal is the term used to describe charred wood that is turned into coal,

0:52.2

but what we're really trying to

0:53.2

describe here is carbonized wood. As it burns, wood releases all the

0:57.6

volatile compounds that were within it is starting with water. Plant saps are

1:01.2

burned off, toxins are often neutralized, and what's left behind is pure carbon

1:06.1

and ash.

1:07.1

Now it's the pure carbon, which is potentially beneficial in your garden, and that should be your goal.

1:13.0

The ash can actually have benefits too,

1:15.0

but the carbon itself is what you are striving for.

1:18.0

You'll know you have good charcoal if it's light in weight,

1:21.0

if it kind of has a clinking ceramic sound when it's dropped and it's

1:25.1

very brittle and breaks easy. If you have material that's heavy or doesn't break

1:29.2

easily that often means that there's unburned parts within it and it's not pure charcoal.

1:35.0

The first question that a lot of people will ask is,

1:38.0

can you use grilling coal?

1:40.0

So if you buy charcoal bricettes, can you actually use them?

...

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