Rock Phosphate

Rock Phosphate - Micronised

Micronised Rock Phosphate is a very fine colloidal calcium phosphate supplying long-term phosphorus and calcium. The very small particle size makes it highly available for plant uptake and can be mixed with water for irrigation. 

Benefits of Micronised Rock Phosphate for Your Garden

• Supports Root and Flowering: Provides stable phosphorus for strong roots and flowering.
• Delivers Calcium Safely: Supplies calcium without altering pH.
• Fast Microbial Access: Fine grind increases microbial access and release speed.

Additional Advantages

• Will not leach like soluble phosphates
• Works well in living soil systems
• Non-acidifying

Application Rates

• Soil Mix: Add 0.5–1g per litre of soil
• Top Dressing: Add 0.25–0.5g per litre of amendable soil volume 
• Watering In: Use 0.5g per litre of water. Stir well and apply 1-2L per plant. 

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

Typical Composition

• Phosphorus (P₂O₅): 32% (14% total P)
• Calcium (Ca): 44%
• Magnesium (Mg): 2%