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Rock Phosphate

Mined Rock Phosphate establishes a long term supply of Phosphorus in the soil by releasing its total Phosphorus slowly over the course of a few years. It is also a significant source of Calcium.

INGREDIENTS: Rock Phosphate.


SKU: N/A Category:
Guaranteed analysis

Available Phosphorus (P2O5): 5.0%

Total Phosphorus: 25.0%

Calcium (Ca): 25.0%


This product complies with Canadian certified organic crop production standards. Contact us for organic compliance documentation.


Gently mix into top 5cm (2”) of soil.

In the garden: Up to 20kg per 100m2 (44lbs per 1000ft2). Annually.

Top dressing: 15-30ml (1-2tbsp) per plant, or 15ml per 4L (1tbsp per gal) of soil, up to once per month.

Premixing soil: 45ml per 4L (3tbsp per gal) of soil. For larger volume soil mixing add up to 5kg (11lbs) per cubic yard of soil.

Weight to volume conversion: Rock Phosphate has a specific gravity of approximately 1.72.

Volume Weight (g)
Tablespoon (15ml) 26
Cup (236ml) 406
Litre 1720