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Soft rock phosphate, or colloidal phosphate, is a natural, untreated source of long-lasting phosphate and soil-building calcium. Phosphate will remain available across a wide pH range. For best availability, soft rock phosphate should be mixed into soil or compost prior to planting. A superb nutrient resource for all types of plants.

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Brand: Down To Earth

SKU: GL56723749

Dimension Height: 11

Dimension Length: 8

Dimension Width: 4

UPC: 714360078158