NTS Soft Rock (1-2) 25kg

Full Season Phosphate Supply Without the Lockups – NTS Soft Rock™

A bio-friendly, colloidal clay-based rock phosphate that provides a continuous, reliable source of phosphorus without the risk of lockup.

Product Overview

NTS Soft Rock™ is a colloidal calcium phosphate fertiliser that ensures ongoing phosphorus availability, unlike other phosphate sources which may lock up in the soil. This premium fertiliser contains 8-9% phosphorus, 19.3% calcium, a high level of silicon, and an impressive array of trace elements. As a microbe-friendly bio-phosphate, it plays a key role in soil regeneration programs and is free from high levels of the heavy metal cadmium often found in processed phosphate fertilisers.

Product Benefits

Australian Certified Organic (ACO) Registered Farm Input 456AI

Colloidal form ensures ongoing plant availability, preventing lockup of key elements

Unprocessed phosphate, making it an environmentally and health-conscious alternative to processed fertilisers

Rich in trace elements, helping to re-mineralise soils

Colloidal minerals enhance soil microbial health

The colloidal calcium (approx. 20%) is more plant-available than traditional limestone

High in silicon, which research suggests can increase brix levels in plants

Typical Analysis (W/V, Dry Basis)

Calcium (Ca): 19.3%

Silicon (Si): 15-26%

Total Phosphorus (P) (as calcium phosphates): 8-9%

Phosphorus (citrate insoluble): 7.2-8.2%

Phosphorus (citrate soluble): 0.80%

Phosphorus (water soluble): 0.03%

Iron (Fe): 2.0%

Total Potassium (K): 0.7%

Magnesium (Mg): 4600 ppm

Sulfur (S): 1500 ppm

Manganese (Mn): 1100 ppm

Zinc (Zn): 260 ppm

Copper (Cu): 130 ppm

Particle Size: Average 1-2 mm granule (finely ground soft rock). Available in 0-2 mm powder, 1-2 mm granule, or 2-4 mm granule upon request for bulk quantities.

Application Rates

Soil: 200 kg to 1.5 tonne per hectare

Home Gardens: 1.25 kg per 10 m²