| Management number | 250621529 | Release Date | 2026/09/17 | List Price | US$4.80 | Model Number | 250621529 | ||
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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. OMRI Listed.
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