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Fertoz's Organic Granulated Rock Phosphate Fertilizer is a 2X concentrated option to replace Calphos. With 20% total phosphorus and 7% available phosphorus, it's a great source of nutrients for your plants. Derived from soft rock phosphate, this product also boasts a high level of CaO and SiO2. Check the Label/Specs tab for detailed metal content information. Boost your plants with this essential macronutrient blend.
