Olivine

Olivine - Magnesium-Iron Silicate

Olivine is a naturally occurring magnesium-iron silicate rock. Our fine-grade olivine powder gradually releases magnesium as it breaks down in the soil, supporting plant health over time. It also provides plant-available silica, which can strengthen cell walls, and releases some iron, though its availability to plants is typically lower.

Benefits of Magnesium Iron Silicate for Your Garden

• Supports Chlorophyll Production: Provides magnesium for chlorophyll and enzyme function.
• Strengthens Tissue: Delivers bioavailable silica to strengthen tissues.
• Low Salinity Risk: Releases nutrients gradually.

Additional Advantages

• Finely milled for better soil contact
• Non-soluble, ideal for long-cycle beds

Application Rates

• Soil Mix: Add 0.25–1g per litre of soil
• Top Dressing: Add 0.25–0.5g per litre of amendable soil volume 

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

Typical Composition

• Magnesium (Mg): 20%
• Iron (Fe): 2%
• Silicon (Si): 42%

Product Data

• Particle size: 90-250μm
• Mean particle size: 120μm
• Hardness (MOH scale): 7-8