{"product_id":"oyster-shell-flour-50-lb-6h2yro","title":"Oyster Shell Flour (50 lb)","description":"\u003cp\u003eNaturally raise soil pH and boost calcium levels with Pacific Pearl Oyster Shell Flour — a high-quality, organic rock dust fertilizer made from finely ground marine oyster shells. Ideal for gardens, orchards, trees, and compost, this premium soil amendment helps build stronger plants and healthier soil season after season.\u003c\/p\u003e\n\u003ch3\u003eKey Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e96% calcium carbonate for pH adjustment and calcium enrichment\u003c\/li\u003e\n\u003cli\u003eImproves soil tilth and nutrient uptake\u003c\/li\u003e\n\u003cli\u003eStrengthens plant cell walls and promotes root growth\u003c\/li\u003e\n\u003cli\u003eContains variable particle sizes for both fast and slow nutrient release\u003c\/li\u003e\n\u003cli\u003e100% natural and OMRI Listed for certified organic gardening\u003c\/li\u003e\n\u003cli\u003eAlso excellent for bocce ball courts and landscape applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApplication Rates\u003c\/h3\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eUse Case\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eAmount\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlowers \u0026amp; Vegetables\u003c\/td\u003e\n\u003ctd\u003e4–5 lbs per 20 row feet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTrees\u003c\/td\u003e\n\u003ctd\u003e1 lb per tree or 1–3 lbs per planting hole\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGeneral Garden Use\u003c\/td\u003e\n\u003ctd\u003e2–10 lbs per 100 sq ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAgricultural Use\u003c\/td\u003e\n\u003ctd\u003e500–4,000 lbs per acre (based on soil test)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eFor best results, apply in early spring or fall and water in thoroughly after application.\u003c\/p\u003e\n\u003ch3\u003eWhy Choose Our Oyster Shell Flour?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMade from clean, finely ground oyster shells\u003c\/li\u003e\n\u003cli\u003eExcellent alternative to lime with longer-lasting results\u003c\/li\u003e\n\u003cli\u003eEnhances compost quality when blended in\u003c\/li\u003e\n\u003cli\u003eImproves soil structure in sandy, clay, or compacted soils\u003c\/li\u003e\n\u003cli\u003eAvailable in a bulk 50 lb bag, perfect for gardens, orchards, and landscaping projects\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHow It Works\u003c\/h3\u003e\n\u003cp\u003eOyster shell flour is a natural source of calcium carbonate, a key mineral that raises soil pH in acidic conditions and strengthens plant cell walls. Its slow-release nature, with both coarse and fine particles, ensures nutrients remain available over time. This helps plants absorb fertilizers more efficiently and supports healthier, more resilient root systems.\u003c\/p\u003e\n\u003ch3\u003eGreat For:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOrganic vegetable gardens\u003c\/li\u003e\n\u003cli\u003eFruit trees, berry bushes, and vineyards\u003c\/li\u003e\n\u003cli\u003eFlower beds and landscaping\u003c\/li\u003e\n\u003cli\u003eCompost and soil mix improvement\u003c\/li\u003e\n\u003cli\u003eBocce ball court base material\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSupport Sustainable Soil Health\u003c\/h3\u003e\n\u003cp\u003eUsing natural soil amendments like oyster shell flour reduces dependence on synthetic chemicals, supports beneficial microbial life, and improves long-term soil fertility — making it an essential tool for regenerative and organic growers.\u003c\/p\u003e\n\u003cp\u003eFor additional soil improvement options, explore our\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.groworganic.com\/collections\/soil-amendments\" target=\"_blank\"\u003esoil amendments collection\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eFor fertilizing and plant nutrition, browse our\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/www.groworganic.com\/collections\/all-purpose-fertilizers\" target=\"_blank\"\u003ecollection of fertilizers\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e⚠ Warning: \u003c\/strong\u003e\u003c\/span\u003eThis product or its packaging carries a\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0061\/1391\/9089\/files\/Prop_65_warning_sign-web.pdf?v=1612218849\" target=\"_blank\"\u003eCA Prop 65 Warning\u003c\/a\u003e.\u003c\/p\u003e","brand":"Grow Organic","offers":[{"title":"Default Title","offer_id":49535555731684,"sku":"F1850","price":5.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0832\/0290\/0196\/files\/F1850_Oyster_Shell_Flour_50_lb_front_9da03361-3cdd-46d1-87cb-08ee984cc553.jpg?v=1785400673","url":"https:\/\/groworganics.shop\/products\/oyster-shell-flour-50-lb-6h2yro","provider":"Westbridge","version":"1.0","type":"link"}