{"product_id":"calphos-soft-rock-phosphate-regular-powder-50-lb-gafu5f","title":"Calphos Soft Rock Phosphate - Regular Powder (50 lb)","description":"\u003cp\u003eCalphos Soft Rock Phosphate is a natural phosphate fertilizer made from finely ground soft rock. It is OMRI-listed for organic use and is especially effective in acid soil and slightly acidic environments. This product is a reliable source of calcium phosphate and trace minerals that gradually release into the soil. The slow release of nutrients supports healthy plant growth, improves soil fertility, and provides benefits that last for the long term.\u003c\/p\u003e\n\u003ch3\u003eWhy Use Calphos Soft Rock Phosphate?\u003c\/h3\u003e\n\u003cp\u003eUnlike many synthetic phosphate fertilizers, Calphos is a natural phosphate source that feeds plants steadily over time. Because it gradually releases phosphorus, it does not wash away easily with rain. Instead, it stays in the root zone, helping plants build strong root systems and maintain healthy soil structure. This makes it an excellent choice for growers focused on enhancing soil naturally while reducing the need for frequent reapplication.\u003c\/p\u003e\n\u003cp\u003eCalphos contains about 20% P₂O₅, with 3% immediately releasing phosphorus for quick results and the rest breaking down slowly for long term benefits. It also provides around 18% calcium, which helps maintain proper soil pH and supports optimal growth.\u003c\/p\u003e\n\u003ch3\u003eKey Benefits of Calphos Soft Rock Phosphate\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBalanced Nutrition:\u003c\/strong\u003e Supplies phosphorus and calcium phosphate in a form that plants can use steadily.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSlow Release Performance:\u003c\/strong\u003e A true slow release fertilizer that feeds plants for up to 5 years.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupports Healthy Soil Ecology:\u003c\/strong\u003e Works well when mixed with organic matter, encouraging microbial activity and improving soil structure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimizes Nutrient Loss:\u003c\/strong\u003e Reduces leaching and keeps nutrients available in the root zone.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersatile Applications:\u003c\/strong\u003e Useful for row crops, orchards, trees, and general soil-building programs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApplication Guidelines\u003c\/h3\u003e\n\u003cp\u003eFor best results, always start with a soil test to understand the nutrient needs and recommended application rates for your soil type and crops.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eField Use: \u003c\/strong\u003eSpread about 1 ton per acre on phosphorus-deficient or acid soil.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTree \u0026amp; Orchard Use:\u003c\/strong\u003e Apply 1–10 lbs of Calphos in each planting hole, mixing it well with the surrounding soil.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-Planting or Blending:\u003c\/strong\u003e Incorporate into the soil before planting or blend with compost and organic matter for a balanced amendment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eBecause Calphos gradually releases nutrients, it provides both immediate and lasting results, reducing the need for repeated fertilizer use.\u003c\/p\u003e\n\u003ch3\u003eA Sustainable Choice for Plant Growth\u003c\/h3\u003e\n\u003cp\u003eCalphos Soft Rock Phosphate is derived from ancient marine deposits, giving it a natural balance of phosphorus, calcium, and trace minerals. By combining these nutrients, it helps create fertile soils that support healthy root systems, vigorous crops, and healthy plant growth.\u003c\/p\u003e\n\u003cp\u003eIts natural composition makes it one of the most reliable phosphate fertilizers for gardeners and farmers who want to focus on enhancing soil rather than relying on quick fixes.\u003c\/p\u003e\n\u003ch3\u003eWhy Gardeners and Farmers Choose Calphos\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOMRI-listed for organic production.\u003c\/li\u003e\n\u003cli\u003eReliable, natural source of phosphorus and calcium phosphate.\u003c\/li\u003e\n\u003cli\u003eExcellent for slightly acidic soils and acid soil.\u003c\/li\u003e\n\u003cli\u003eImproves fertility while supporting healthy microbial life.\u003c\/li\u003e\n\u003cli\u003eProvides both quick and long term nutrient availability.\u003c\/li\u003e\n\u003cli\u003eIdeal for row crops, fruit trees, and soil-enrichment programs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eAvailable Sizes\u003c\/h3\u003e\n\u003cp\u003eThis 50 lb bag is perfect for larger gardens, farms, and orchards. For smaller applications, Calphos Soft Rock Phosphate is also available in a convenient 5 lb bag.\u003c\/p\u003e\n\u003cp\u003eFor smaller applications, \u003ca href=\"https:\/\/www.groworganic.com\/products\/calphos-soft-rock-phosphate-5-lb-bag\"\u003eCalphos Soft Rock Phosphate is also available in a 5 lb bag\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eExplore more options in our \u003ca href=\"https:\/\/www.groworganic.com\/collections\/high-phosphorus-fertilizer\"\u003eHigh Phosphorus Fertilizer Collection\u003c\/a\u003e or shop the full range in \u003ca href=\"https:\/\/www.groworganic.com\/collections\/fertilizer-growing-supplies\"\u003eFertilizer \u0026amp; Growing Supplies\u003c\/a\u003e.\u003c\/p\u003e","brand":"Grow Organic","offers":[{"title":"Default Title","offer_id":49535803752676,"sku":"F2101","price":4.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0832\/0290\/0196\/files\/F2101_Calphos_Soft_Rock_Phosphate_-_Regular_Powder_50_lb_ef33c29d-2e0a-4c07-8a27-fd8d910e54fe.png?v=1785402562","url":"https:\/\/groworganics.shop\/products\/calphos-soft-rock-phosphate-regular-powder-50-lb-gafu5f","provider":"Westbridge","version":"1.0","type":"link"}