Pumice 7-20mm

(3 customer reviews)


Packed in 1kg bags


100% Natural New Zealand Pumice (Not man-made)

  • Clean and Pathogen-free
  • Full of trace elements and minerals
  • Suitable for cacti, succulents, general plants and semi-hydroponics



Plant Health

A benefit of this inorganic rock is that it does not attract or host fungi or insects. Thus avoiding a whole lot of problems.


Moisture retention

Drainage is very important in horticulture, with the presence of pumice tillage is much easier. Pumice usage also creates ideal conditions for growing plants like cacti and succulents as it increases the water retention in sandy soils and reduces the density of clayey soils to allow more transportation of gases and water.


Soil Conditioning

A good soil requires sufficient water and nutrient loading as well as little compaction to allow easy exchange of gases. The roots of plants require continuous transportation of carbon dioxide and oxygen to and from the surface.

Pumice improves the quality of soil because of its porous properties, water and gases can be transported easily through the pores and nutrients can be stored in the microscopic holes. Pumice rock fragments are inorganic therefore no decomposition and little compaction occurs.

Soil Erosion Prevention

Addition of pumice to a soil improves and increases vegetative cover as the roots of plants make slopes more stable therefore it helps reduce erosion. It is often used on roadsides and ditches and commonly used in turf and golf courses to maintain grass cover and flatness that can degrade due to large amounts of traffic and compaction. With regards to chemical properties pumice is pH neutral, it is not acidic or alkaline.

We have this product in bulk and repackage it into smaller sizes. For smaller sizes, please visit here.


Particle Size

Chemical Stability

Solubility in water
Virtually Insoluble

New Zealand

Minerals Content

Silica 71.0%
Aluminium Oxide 13.0%
Ferric Oxide 2.0%
Ferrous Oxide 0.07%
Magnesium Oxide 0.4%
Calcium Oxide 1.6%
Sodium Oxide 3.7%
Potassium Oxide 2.8%
Titanium Di-Oxide 0.2%
Phosphorus 0.05%
Moisture 0.45%
Loss in Ignition 3.4%

Additional information

Weight1 kg
Dimensions20 × 10 × 5 cm


3 reviews for Pumice 7-20mm

5.0 Rating
1-3 of 3 reviews
  1. Awesome

    (0) (0)
  2. Excellent drainage and good quality, will be back for more

    (0) (0)
  3. Perfect for my larger cacti and aroids, i mix this in my own mix and my plants are thriving

    (0) (0)
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Green power Australia natural gardening supplies - Pumice is a type of extrusive volcanic rock, produced when lava with a very high content of water and gases is discharged from a volcano. As the gas bubbles escape, the lava becomes frothy. When this lava cools and hardens, the result is a very light rock material filled with tiny bubbles of gas. It is Clean and Pathogen-free, Full of trace elements and minerals, Suitable for cacti, succulents, general plants and semi-hydroponics Pumice comes in 3 sizes 1-2mm, 1-7mm and 7-20mm. 100% Natural from New Zealand and Australia. They are Organic Mineral Stones great for succulant cactus aroids soilless hydro air planting. You can do your own DIY Lechuza Pon Mix.

Pumice 7-20mm

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