Volcanic Rock Dust

Volcanic Rock Dust

Volcanic Rock Dust supplies a broad suite of slow-release minerals, helping to remineralise tired soils and support long-term fertility. Ground to a super-fine powder for quicker release, this volcanic rock dust can be used at 10-20x lower rates than commonly available rock dust! 

Benefits of Rock Dust for Your Garden

• Replenishes Micronutrients: Restores key micronutrients depleted over successivecycles.
• Feeds Microbial Life: Feeds diverse soil microbes, encouraging balanced biology.
• Enhances Soil Function: Improves cation-exchange capacity and moisture management.

Additional Advantages

• Finely ground for faster soil integration
• pH-neutral, non-saline
• Sourced from volcanic lava parent rock

Application Rates

• Soil Mix: Add 0.5–2g per litre of soil

For best results, amendments should be applied after a soil test. Contact us if you need advice.

Typical Composition

• Silicon (Si): 20%
• Calcium (Ca): 8%
• Magnesium (Mg): 5%
• Iron (Fe): 7.5%

Product Data

• Particle size: 125-1.4μm
• Mean particle size: 39μm