Pumice Stone for Plants

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Pumice stone is a light-coloured, volcanic rock that is used throughout the horticulture industry. It is an extremely versatile rock. It is also responsible for some of the most fertile land in the US and Mexico.

But how is this super rock made?

Pumice has an interesting start to life and is actually made during explosive volcanic eruptions!

It all starts when gas dissolved in magma rapidly expands to create a foam that sits on top of the magma. This foamy magma is then ejected from the volcano which then cools down to form Pumice.

This process gives Pumice some really neat characteristics like being lightweight and its sponge-like texture.

Pumice can also be known as Akadama, which is a type of Pumice that is exclusively found in Japan.

Most of the Pumice available in Australia is commonly sourced from Japan, New Zealand and the United States.

Pumice is incredible when used in the garden and can be used as a:

  • Soil conditioner
  • Soil alternative in hydroponics
  • Included in soil mixes
  • Used in potting mixes for Cacti, Succulents and Orchids
  • Used as a decorative rock for Bonsai plants
  • And much more

Another cool thing about Pumice is that even though it’s lightweight it’s actually hard and doesn’t crumble when rubbed together, unlike perlite.

Pumice is also porous, which gives us some great properties when used in soil mixes.

Water retention/drainage

Because of its pores, Pumice has the ability to absorb water while allowing the excess water to drain through. It also allows for water and oxygen to move freely through the soil which reduces the chance of root disease.

Perfect home for the Soil Biology

Like Charcoal, Pumice provides an excellent microclimate for the beneficial bacteria and fungi to live and thrive in due to its pores which leads to healthier plants.

Contains trace minerals

Pumice is primarily Silica but also has trace minerals that your plants can utilise like, Magnesium, Calcium, Potassium and Phosphorus.

PH natural

Pumice will not cause the pH of your soil to go up or down as it is pH neutral (7.0).

Doesn’t decompose

Pumice is also inorganic which means it doesn’t decompose.