Rock Phosphate – Natural Ground Phosphate Rock for Slow-Release فاسفورس (Phosphorus) to Support Roots, Flowers & Fruit in Gardens, Orchards & Nurseries

What Is Rock Phosphate? (راک فاسفیٹ کیا ہے؟)

Meaning of Rock Phosphate in Urdu is “چٹانی فاسفیٹ کھاد” فاسفورس سے بھرپور قدرتی معدنی چٹان کو پیس کر بنائی جانے والی کھاد. It is a mined mineral, made up mostly of apatite, that is ground so it can be worked into garden and orchard soil.

Unlike quick-release chemical feeds, the phosphorus in this mineral dissolves slowly, so it is a patient, long-game nutrient source. Marketed phosphate rock is typically enriched to about 28–30% P2O5 or higher (a general figure, not a lab test of each batch).

At a Glance

Why Does Your Garden Need It?

Phosphorus drives root growth and flowering, and many soils run short of plant-available phosphorus over time, especially where beds are cropped year after year. Pakistani gardens also add their own twist: monsoon rain can wash nutrients through light soil, while heavy clay can lock them up.

There is one important catch. The phosphorus in ground rock is released best in acidic conditions, and many garden soils in Pakistan are neutral to alkaline. That is why this mineral works best in تیزابی مٹی (acidic soil) or when it is blended into compost, and why a quick soil pH test is a smart first step. Looking for a phosphorus fertilizer near me? Browse the full range in our Mineral Amendments category.

What Does It Do for Your Plants?

• Can help support root development, because phosphorus is a key nutrient for young roots.
• May encourage better flowering and fruit set when the soil was short of phosphorus.
• Releases slowly, so it works as a long-term soil build-up rather than a quick feed.
• Can be blended into compost to give the soil a phosphorus reserve.
• Is a natural mineral, with no animal or plant matter in the sack unless noted.

Results depend on your soil, your plants and your watering.

Where Should You Use It and How Much?

These are conservative starting points, not limits. A soil test is the best guide, and phosphorus builds up in soil, so there is no benefit in piling it on.

Skip it if a soil test shows your phosphorus is already high.

How Is It Different from Other Soil Feeds?

Do not combine it with alkaline amendments such as rice husk ash, because higher pH slows the release of phosphorus.

How Does It Work?

As described in Wikipedia’s article on phosphorite, phosphate rock is a sedimentary rock rich in phosphate minerals, mainly fluorapatite. Marketed rock is washed, screened and otherwise enriched to roughly 28% P2O5 or higher, and about 90% of production goes into fertilizer and animal feed. Phosphate rock is tracked as a mineral commodity by the US Geological Survey (see its Minerals Yearbook).

Wikipedia also notes that rock phosphate is marketed as a more natural alternative to chemical phosphate fertilizer, and that, according to an FAO report, it can be sustainable in certain soil types but has drawbacks. A key drawback is that apatite dissolves slowly and dissolves best when the soil is acidic or biologically active, so in neutral or alkaline soil the response may be small. Blending with compost and keeping the soil moist can help.

How Do You Use It?

1. Wear gloves and a dust mask, and wash your hands afterwards.
2. Lightly dampen the material to keep dust down, and keep it away from children and pets.
3. Check your soil pH if you can. This mineral suits acidic soil best.
4. Measure the starting amount for your bed, pot or tree from the table above.
5. Spread it evenly and mix it into the top soil, close to where the roots will grow, because phosphorus moves very little in soil.
6. Plant, then water in well.
7. Re-apply only if a soil test or plant symptoms suggest phosphorus is still low.
8. Store the sack closed and dry, away from sun and moisture.

Product Specifications