{"product_id":"calcium-nitrate-fertilizer-15-5-0-0-ammonia-calcium-nitrate-15-5-0-0","title":"Calcium Nitrate Fertilizer 15.5-0-0 (Ammonia Calcium Nitrate 15.5-0-0)","description":"\u003c!-- ═══════════════════════════════════════════════════════════════\n     CALCIUM NITRATE 15.5-0-0 - Greenway Biotech Product Page\n     Version: 2.7.1 | Updated: April 2026\n     Architecture: Modular CSS + Dispatcher Calculator Pattern\n     Blog Articles Linked: 7 (Best Calcium Fertilizer, Calcium in Plants,\n       Best Water-Soluble Fertilizers, Best Tomato Fertilizer,\n       Hydroponics Fertilizers, Best Nitrogen Fertilizer,\n       Best Fertilizer for Lettuce)\n     Blog Articles TODO: 0\n     Review: Agronomist ✅ | Marketing\/SEO ✅ | April 2026\n     ═══════════════════════════════════════════════════════════════ --\u003e\n\n\u003cdiv class=\"gwb-product\"\u003e\n\u003cdiv class=\"wrapper\"\u003e\n\n\u003c!-- ══════════════════ HERO ══════════════════ --\u003e\n\u003ch1\u003eCalcium Nitrate Fertilizer \u003cspan class=\"green\"\u003e15.5-0-0\u003c\/span\u003e\n\u003c\/h1\u003e\n\u003cp class=\"hero-subtitle\"\u003e\u003cstrong\u003eFast-acting ammonium calcium nitrate with 15.5% nitrogen and 19% calcium. 100% water-soluble formula can significantly reduce blossom end rot, strengthen cell walls, and deliver dual-nutrient efficiency for soil, hydroponic, and foliar applications.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003c!-- ══════════════════ TRUST BADGES ══════════════════ --\u003e\n\u003cdiv class=\"trust-badges\"\u003e\n  \u003cspan class=\"badge\" aria-label=\"CDFA Registered fertilizer\"\u003e🧪 CDFA Registered\u003c\/span\u003e\n  \u003ca href=\"\/pages\/about-us\" target=\"_blank\" rel=\"noopener\" class=\"badge\" aria-label=\"Made in USA\"\u003e🇺🇸 Made in USA\u003c\/a\u003e\n  \u003cspan class=\"badge\" aria-label=\"90-Day Money-Back Guarantee\"\u003e🛡️ 90-Day Guarantee\u003c\/span\u003e\n  \u003ca href=\"\/pages\/returns\" target=\"_blank\" rel=\"noopener\" class=\"badge\" aria-label=\"Free Shipping on orders over 100 dollars\"\u003e🚚 Free Shipping $100+\u003c\/a\u003e\n\u003c\/div\u003e\n\n\u003c!-- ══════════════════ IDEAL APPLICATIONS ══════════════════ --\u003e\n\u003csection class=\"best-for\"\u003e\n  \u003ch2\u003eIdeal Applications\u003c\/h2\u003e\n  \u003cdiv class=\"best-for-grid\"\u003e\n    \u003cdiv class=\"best-for-item\"\u003e\n      \u003cdiv class=\"best-for-icon\" aria-hidden=\"true\"\u003e🍅\u003c\/div\u003e\n      \u003cdiv class=\"best-for-name\"\u003eTomatoes \u0026amp; Peppers\u003c\/div\u003e\n      \u003cdiv class=\"best-for-rate\"\u003e3-4 lb \/ 100 sq ft\u003c\/div\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"best-for-item\"\u003e\n      \u003cdiv class=\"best-for-icon\" aria-hidden=\"true\"\u003e🥒\u003c\/div\u003e\n      \u003cdiv class=\"best-for-name\"\u003eCucurbits\u003c\/div\u003e\n      \u003cdiv class=\"best-for-rate\"\u003e2-3 lb \/ 100 sq ft\u003c\/div\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"best-for-item\"\u003e\n      \u003cdiv class=\"best-for-icon\" aria-hidden=\"true\"\u003e🥬\u003c\/div\u003e\n      \u003cdiv class=\"best-for-name\"\u003eLeafy Greens\u003c\/div\u003e\n      \u003cdiv class=\"best-for-rate\"\u003e1.5-2 lb \/ 100 sq ft\u003c\/div\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"best-for-item\"\u003e\n      \u003cdiv class=\"best-for-icon\" aria-hidden=\"true\"\u003e🥦\u003c\/div\u003e\n      \u003cdiv class=\"best-for-name\"\u003eBrassicas\u003c\/div\u003e\n      \u003cdiv class=\"best-for-rate\"\u003e3-4 lb \/ 100 sq ft\u003c\/div\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"best-for-item\"\u003e\n      \u003cdiv class=\"best-for-icon\" aria-hidden=\"true\"\u003e🍎\u003c\/div\u003e\n      \u003cdiv class=\"best-for-name\"\u003eTree Fruits\u003c\/div\u003e\n      \u003cdiv class=\"best-for-rate\"\u003eFoliar: 2 tbsp \/ gal\u003c\/div\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"best-for-item\"\u003e\n      \u003cdiv class=\"best-for-icon\" aria-hidden=\"true\"\u003e💧\u003c\/div\u003e\n      \u003cdiv class=\"best-for-name\"\u003eHydroponics\u003c\/div\u003e\n      \u003cdiv class=\"best-for-rate\"\u003e1-2 tsp \/ gallon\u003c\/div\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"best-for-item\"\u003e\n      \u003cdiv class=\"best-for-icon\" aria-hidden=\"true\"\u003e🪴\u003c\/div\u003e\n      \u003cdiv class=\"best-for-name\"\u003eContainers\u003c\/div\u003e\n      \u003cdiv class=\"best-for-rate\"\u003e1 tsp \/ gallon water\u003c\/div\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"best-for-item\"\u003e\n      \u003cdiv class=\"best-for-icon\" aria-hidden=\"true\"\u003e🍃\u003c\/div\u003e\n      \u003cdiv class=\"best-for-name\"\u003eFoliar Spray\u003c\/div\u003e\n      \u003cdiv class=\"best-for-rate\"\u003e1-2 tbsp \/ gallon\u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003c!-- ══════════════════ CRITICAL COMPATIBILITY ALERT ══════════════════ --\u003e\n\u003cdiv class=\"warning-box\"\u003e\n  \u003cstrong\u003e⚠️ Critical Compatibility Alert:\u003c\/strong\u003e Never mix calcium nitrate directly with phosphate fertilizers (MAP, DAP, MKP). In hydroponics, add calcium nitrate and phosphate sources to the reservoir separately. Mixing them together causes immediate calcium phosphate precipitation.\n\u003c\/div\u003e\n\n\u003c!-- ══════════════════ 1. FEATURES ══════════════════ --\u003e\n\u003cdetails\u003e\n  \u003csummary\u003e\u003cspan class=\"green\"\u003eFEATURES\u003c\/span\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"details-content\"\u003e\n    \u003cdiv class=\"benefits-grid\"\u003e\n      \u003cdiv class=\"benefit-card\"\u003e\n        \u003ch3\u003e🛡️ 19% Calcium for Cell Wall Strength\u003c\/h3\u003e\n        \u003cp\u003eDelivers immediately available Ca²⁺ ions that reinforce cell walls, can help prevent blossom end rot in tomatoes and peppers, and may reduce tip burn in lettuce and brassicas.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"benefit-card\"\u003e\n        \u003ch3\u003e⚡ 15.5% Dual-Form Nitrogen\u003c\/h3\u003e\n        \u003cp\u003eCombines fast-acting nitrate nitrogen with ammonium nitrogen for both immediate green-up and sustained vegetative growth. Ammonium is converted by soil microbes over days to weeks, extending the feeding window.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"benefit-card\"\u003e\n        \u003ch3\u003e💧 100% Water Soluble\u003c\/h3\u003e\n        \u003cp\u003eDissolves completely with zero residue for uniform nutrient delivery through drip irrigation, foliar sprayers, hydroponic reservoirs, and watering cans.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"benefit-card\"\u003e\n        \u003ch3\u003e⚖️ Near-Neutral pH Effect\u003c\/h3\u003e\n        \u003cp\u003eHas minimal impact on soil pH under normal use — unlike ammonium sulfate, which acidifies, or lime, which raises pH significantly. Allows for routine applications without constant pH correction in most soils.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"benefit-card\"\u003e\n        \u003ch3\u003e🎯 Dual-Action Nutrient Delivery\u003c\/h3\u003e\n        \u003cp\u003eProvides both nitrogen and calcium in a single application — eliminating the need for separate calcium supplements when nitrogen feeding is also required.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"benefit-card\"\u003e\n        \u003ch3\u003e🌿 Phosphorus-Free Formula\u003c\/h3\u003e\n        \u003cp\u003eZero phosphorus prevents environmental P loading and runoff concerns. Ideal for regions with phosphorus application restrictions or waterway-adjacent properties.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"benefit-card\"\u003e\n        \u003ch3\u003e🔬 Tested for Heavy Metals\u003c\/h3\u003e\n        \u003cp\u003eThird-party laboratory tested for heavy metal content, with results consistently well below required limits. Commercial-grade quality trusted by professional growers and agricultural operations.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"benefit-card\"\u003e\n        \u003ch3\u003e🍅 Blossom End Rot Prevention\u003c\/h3\u003e\n        \u003cp\u003eThe 19% calcium content directly addresses the calcium transport deficiency that contributes to BER in tomatoes, peppers, cucumbers, squash, melons, and eggplant. Consistent watering is equally important.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"benefit-card\"\u003e\n        \u003ch3\u003e🌱 Multi-System Versatility\u003c\/h3\u003e\n        \u003cp\u003eEffective in soil gardens, raised beds, containers, NFT, DWC, ebb and flow, drip-to-waste, and aeroponic systems. One product for a wide range of growing methods.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"benefit-card\"\u003e\n        \u003ch3\u003e📋 CDFA Registered\u003c\/h3\u003e\n        \u003cp\u003eRegistered with the California Department of Food \u0026amp; Agriculture. Manufactured in the USA since 1989 to commercial-grade specifications.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003c!-- ══════════════════ 2. DERIVED FROM ══════════════════ --\u003e\n\u003cdetails\u003e\n  \u003csummary\u003e\u003cspan class=\"green\"\u003eDERIVED FROM\u003c\/span\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"details-content\"\u003e\n    \u003cp\u003eCalcium nitrate is a synthetic, water-soluble salt manufactured by reacting calcium carbonate (limestone) with nitric acid. The resulting compound — ammonium calcium nitrate — provides two essential plant nutrients in a single, highly pure crystal.\u003c\/p\u003e\n\n    \u003ch3 class=\"brown\"\u003ePrimary Compound\u003c\/h3\u003e\n    \u003cdiv class=\"pairs-grid\"\u003e\n      \u003cdiv class=\"pair-item\"\u003e\n        \u003ch3\u003eAmmonium Calcium Nitrate\u003c\/h3\u003e\n        \u003cp\u003eCa(NO₃)₂·NH₄NO₃ — provides 15.5% nitrogen (as nitrate and ammonium) and 19% calcium (as Ca²⁺). Fully water-soluble inorganic salt.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n\n    \u003ch3 class=\"brown\"\u003eComplementary Nutrients (Sold Separately)\u003c\/h3\u003e\n    \u003cdiv class=\"pairs-grid\"\u003e\n      \u003ca href=\"\/products\/potassium-sulfate-0-0-53\" class=\"pair-item\" target=\"_blank\" rel=\"noopener\"\u003e\n        \u003ch3\u003ePotassium Sulfate 0-0-53\u003c\/h3\u003e\n        \u003cp\u003eAdd potassium for fruit quality, disease resistance, and water regulation — the K that calcium nitrate doesn't provide.\u003c\/p\u003e\n      \u003c\/a\u003e\n      \u003ca href=\"\/products\/monopotassium-phosphate-mkp-0-52-34\" class=\"pair-item\" target=\"_blank\" rel=\"noopener\"\u003e\n        \u003ch3\u003eMKP 0-52-34\u003c\/h3\u003e\n        \u003cp\u003ePhosphorus and potassium for flowering and fruiting stages. Always add separately from calcium nitrate to prevent precipitation.\u003c\/p\u003e\n      \u003c\/a\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003c!-- ══════════════════ 3. SCIENCE BEHIND THE FORMULA ══════════════════ --\u003e\n\u003cdetails\u003e\n  \u003csummary\u003e\u003cspan class=\"green\"\u003eSCIENCE BEHIND THE FORMULA\u003c\/span\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"details-content\"\u003e\n    \u003cdiv class=\"info-box\"\u003e\n      \u003ch3 class=\"teal\"\u003e15.5-0-0 + 19% Calcium: The Dual-Nutrient Workhorse\u003c\/h3\u003e\n      \u003cp\u003eThis formula combines two of the most in-demand plant nutrients — nitrogen for growth and calcium for structural integrity — in a single, immediately available package. The nitrogen is split between nitrate (fast-acting) and ammonium forms; soil microbes convert ammonium over days to weeks, extending the feeding window across growth stages.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv class=\"benefits-grid\"\u003e\n      \u003cdiv class=\"benefit-card\"\u003e\n        \u003ch3\u003e🌿 Nitrogen — 15.5% (Growth Engine)\u003c\/h3\u003e\n        \u003cp\u003eDrives chlorophyll production, protein synthesis, and vegetative growth. The nitrate fraction is immediately plant-available, while the ammonium fraction extends feeding as soil microbes convert it to nitrate over time.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"benefit-card\"\u003e\n        \u003ch3\u003e🛡️ Calcium — 19% (Structural Foundation)\u003c\/h3\u003e\n        \u003cp\u003eEssential for cell wall formation, cell division, and nutrient transport. Supplying Ca²⁺ directly to developing tissues can help prevent blossom end rot, tip burn, and bitter pit where demand is highest during rapid fruit expansion.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"benefit-card\"\u003e\n        \u003ch3\u003e💧 Solubility — 100% (Instant Delivery)\u003c\/h3\u003e\n        \u003cp\u003eDissolves completely in water for uniform distribution. Unlike gypsum or lime, nutrients are immediately available to roots — no waiting for soil microbes or pH-dependent dissolution.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n\n    \u003ch3 class=\"brown\"\u003eWhy Calcium Nitrate Outperforms Other Calcium Sources\u003c\/h3\u003e\n    \u003cdiv class=\"benefits-grid\"\u003e\n      \u003cdiv class=\"benefit-card\"\u003e\n        \u003ch3\u003e⚡ Speed of Correction\u003c\/h3\u003e\n        \u003cp\u003eGypsum and lime take weeks to months to release calcium. Calcium nitrate delivers Ca²⁺ within hours of application — making it the most practical choice when blossom end rot symptoms are already appearing on developing fruit.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"benefit-card\"\u003e\n        \u003ch3\u003e⚖️ Minimal pH Shift\u003c\/h3\u003e\n        \u003cp\u003eLime raises soil pH significantly. Ammonium sulfate acidifies it. Calcium nitrate has a near-neutral pH effect under normal use, making it suitable for routine applications without regular pH correction in most buffered soils.\u003c\/p\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"benefit-card\"\u003e\n        \u003ch3\u003e🎯 Dual Nutrient Efficiency\u003c\/h3\u003e\n        \u003cp\u003eOne application delivers both nitrogen and calcium. Gypsum provides only calcium with zero nitrogen. This reduces application passes and product inventory for growers managing multiple nutrient needs at once.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n\n    \u003ch3 class=\"brown\"\u003eUnderstanding Blossom End Rot\u003c\/h3\u003e\n    \u003cdiv class=\"info-box\"\u003e\n      \u003ch3 class=\"teal\"\u003eWhy BER Happens — Even in Calcium-Rich Soil\u003c\/h3\u003e\n      \u003cp\u003eBlossom end rot appears as dark, sunken, leathery spots on the bottom of fruits. It's caused by insufficient calcium reaching developing fruit tissue — even when soil calcium levels test adequate. The key reason is that calcium travels through the plant only via the xylem (water-conducting tissue), pulled upward by transpiration. Crucially, calcium cannot move back through the phloem to redirect toward rapidly expanding fruit. This means inconsistent watering, rapid growth spurts, and high humidity can all disrupt calcium delivery to fruit tips, regardless of soil levels. Foliar and fertigation applications of calcium nitrate during fruit development can help bypass this bottleneck by providing a more direct supply.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003ch3 class=\"brown\"\u003ePrevention Timeline\u003c\/h3\u003e\n    \u003cdiv class=\"timeline\"\u003e\n      \u003cdiv class=\"timeline-item\"\u003e\n        \u003cspan class=\"day\"\u003eWeek 1\u003c\/span\u003e\n        \u003cspan class=\"icon\" aria-hidden=\"true\"\u003e🌱\u003c\/span\u003e\n        \u003cspan\u003eFirst Flowers — Begin monitoring for fruit set\u003c\/span\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"timeline-item\"\u003e\n        \u003cspan class=\"day\"\u003eWeek 2\u003c\/span\u003e\n        \u003cspan class=\"icon\" aria-hidden=\"true\"\u003e🍅\u003c\/span\u003e\n        \u003cspan\u003eWalnut-Sized Fruit — Apply calcium nitrate now\u003c\/span\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"timeline-item\"\u003e\n        \u003cspan class=\"day\"\u003eWeeks 3-4\u003c\/span\u003e\n        \u003cspan class=\"icon\" aria-hidden=\"true\"\u003e✅\u003c\/span\u003e\n        \u003cspan\u003eProtected — Continue biweekly applications\u003c\/span\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"timeline-item\"\u003e\n        \u003cspan class=\"day\"\u003eHarvest\u003c\/span\u003e\n        \u003cspan class=\"icon\" aria-hidden=\"true\"\u003e🎯\u003c\/span\u003e\n        \u003cspan\u003eFirm, Healthy Fruits — Reduced BER risk\u003c\/span\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n    \u003cp\u003e\u003cem\u003eResults vary with watering consistency, humidity, growth rate, and soil conditions. Maintain even soil moisture alongside calcium applications for best results.\u003c\/em\u003e\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003c!-- ══════════════════ COMPARISON TABLE ══════════════════ --\u003e\n\u003cdetails\u003e\n  \u003csummary\u003e\u003cspan class=\"green\"\u003eCOMPARE CALCIUM AND NITROGEN SOURCES\u003c\/span\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"details-content\"\u003e\n    \u003cdiv class=\"table-scroll\"\u003e\n      \u003ctable class=\"comparison-table\"\u003e\n        \u003ccaption\u003eCalcium \u0026amp; Nitrogen Source Comparison\u003c\/caption\u003e\n        \u003cthead\u003e\n          \u003ctr\u003e\n            \u003cth scope=\"col\"\u003eFeature\u003c\/th\u003e\n            \u003cth scope=\"col\" class=\"highlight\"\u003eCalcium Nitrate 15.5-0-0\u003c\/th\u003e\n            \u003cth scope=\"col\"\u003eCal-Mag Plus 2-0-0\u003c\/th\u003e\n            \u003cth scope=\"col\"\u003eAmmonium Sulfate 21-0-0\u003c\/th\u003e\n            \u003cth scope=\"col\"\u003eGypsum\u003c\/th\u003e\n          \u003c\/tr\u003e\n        \u003c\/thead\u003e\n        \u003ctbody\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eNitrogen\u003c\/td\u003e\n            \u003ctd class=\"highlight\"\u003e15.5%\u003c\/td\u003e\n            \u003ctd\u003e2%\u003c\/td\u003e\n            \u003ctd\u003e21%\u003c\/td\u003e\n            \u003ctd\u003e0%\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eCalcium\u003c\/td\u003e\n            \u003ctd class=\"highlight\"\u003e19%\u003c\/td\u003e\n            \u003ctd\u003e3.2%\u003c\/td\u003e\n            \u003ctd\u003e0%\u003c\/td\u003e\n            \u003ctd\u003e23%\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eMagnesium\u003c\/td\u003e\n            \u003ctd class=\"highlight\"\u003e0%\u003c\/td\u003e\n            \u003ctd\u003e1.7%\u003c\/td\u003e\n            \u003ctd\u003e0%\u003c\/td\u003e\n            \u003ctd\u003e0%\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eWater Solubility\u003c\/td\u003e\n            \u003ctd class=\"highlight\"\u003e100%\u003c\/td\u003e\n            \u003ctd\u003e100%\u003c\/td\u003e\n            \u003ctd\u003e100%\u003c\/td\u003e\n            \u003ctd\u003eVery low\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eSpeed of Action\u003c\/td\u003e\n            \u003ctd class=\"highlight\"\u003eImmediate\u003c\/td\u003e\n            \u003ctd\u003eImmediate\u003c\/td\u003e\n            \u003ctd\u003eImmediate\u003c\/td\u003e\n            \u003ctd\u003eSlow\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003epH Effect\u003c\/td\u003e\n            \u003ctd class=\"highlight\"\u003eNear-neutral\u003c\/td\u003e\n            \u003ctd\u003eNear-neutral\u003c\/td\u003e\n            \u003ctd\u003eAcidifying\u003c\/td\u003e\n            \u003ctd\u003eNear-neutral\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eHydroponic Use\u003c\/td\u003e\n            \u003ctd class=\"highlight\"\u003eExcellent\u003c\/td\u003e\n            \u003ctd\u003eExcellent\u003c\/td\u003e\n            \u003ctd\u003eLimited\u003c\/td\u003e\n            \u003ctd\u003eNot recommended\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eBest For\u003c\/td\u003e\n            \u003ctd class=\"highlight\"\u003eBER prevention + growth\u003c\/td\u003e\n            \u003ctd\u003eRO water + coco coir\u003c\/td\u003e\n            \u003ctd\u003eNitrogen + sulfur\u003c\/td\u003e\n            \u003ctd\u003eClay soil improvement\u003c\/td\u003e\n          \u003c\/tr\u003e\n        \u003c\/tbody\u003e\n      \u003c\/table\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003c!-- ══════════════════ 4. APPLICATION RATES \u0026 DIRECTIONS ══════════════════ --\u003e\n\u003cdetails\u003e\n  \u003csummary\u003e\u003cspan class=\"green\"\u003eAPPLICATION RATES \u0026amp; DIRECTIONS\u003c\/span\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"details-content\"\u003e\n    \u003cp\u003eMix into topsoil or dissolve in water. Always water thoroughly after dry application to move calcium into the root zone.\u003c\/p\u003e\n\n    \u003ch3 class=\"brown\"\u003eSeasonal Application Guide\u003c\/h3\u003e\n    \u003cdiv class=\"seasonal-grid\"\u003e\n      \u003cdiv class=\"season-card\"\u003e\n        \u003cdiv class=\"season-icon\" aria-hidden=\"true\"\u003e🌸\u003c\/div\u003e\n        \u003cdiv class=\"season-name\"\u003eSpring\u003c\/div\u003e\n        \u003cdiv class=\"season-tip\"\u003eApply at planting \u0026amp; first flowers\u003c\/div\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"season-card\"\u003e\n        \u003cdiv class=\"season-icon\" aria-hidden=\"true\"\u003e☀️\u003c\/div\u003e\n        \u003cdiv class=\"season-name\"\u003eSummer\u003c\/div\u003e\n        \u003cdiv class=\"season-tip\"\u003eCritical period — apply when fruits form\u003c\/div\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"season-card\"\u003e\n        \u003cdiv class=\"season-icon\" aria-hidden=\"true\"\u003e🍂\u003c\/div\u003e\n        \u003cdiv class=\"season-name\"\u003eFall\u003c\/div\u003e\n        \u003cdiv class=\"season-tip\"\u003eContinue for late-season crops\u003c\/div\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"season-card\"\u003e\n        \u003cdiv class=\"season-icon\" aria-hidden=\"true\"\u003e❄️\u003c\/div\u003e\n        \u003cdiv class=\"season-name\"\u003eWinter\u003c\/div\u003e\n        \u003cdiv class=\"season-tip\"\u003eGreenhouse \u0026amp; indoor applications\u003c\/div\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n\n    \u003ch3 class=\"brown\"\u003eTomatoes \u0026amp; Peppers\u003c\/h3\u003e\n    \u003cdiv class=\"table-scroll\"\u003e\n      \u003ctable\u003e\n        \u003ccaption\u003eApply when fruits are walnut-sized for BER prevention\u003c\/caption\u003e\n        \u003cthead\u003e\n          \u003ctr\u003e\n            \u003cth scope=\"col\"\u003eStage\u003c\/th\u003e\n            \u003cth scope=\"col\"\u003eRate\u003c\/th\u003e\n            \u003cth scope=\"col\"\u003eFrequency\u003c\/th\u003e\n          \u003c\/tr\u003e\n        \u003c\/thead\u003e\n        \u003ctbody\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eAt Planting\u003c\/td\u003e\n            \u003ctd\u003e1-2 lb \/ 100 sq ft\u003c\/td\u003e\n            \u003ctd\u003eOnce\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eFirst Fruit Set\u003c\/td\u003e\n            \u003ctd\u003e2-3 lb \/ 100 sq ft\u003c\/td\u003e\n            \u003ctd\u003eOnce\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eMaintenance\u003c\/td\u003e\n            \u003ctd\u003e1 lb \/ 100 sq ft\u003c\/td\u003e\n            \u003ctd\u003eEvery 2-3 weeks\u003c\/td\u003e\n          \u003c\/tr\u003e\n        \u003c\/tbody\u003e\n      \u003c\/table\u003e\n    \u003c\/div\u003e\n\n    \u003ch3 class=\"brown\"\u003eLeafy Vegetables\u003c\/h3\u003e\n    \u003cdiv class=\"table-scroll\"\u003e\n      \u003ctable\u003e\n        \u003ccaption\u003eCan help prevent tip burn in lettuce and brassicas\u003c\/caption\u003e\n        \u003cthead\u003e\n          \u003ctr\u003e\n            \u003cth scope=\"col\"\u003eCrop\u003c\/th\u003e\n            \u003cth scope=\"col\"\u003ePer Plant\u003c\/th\u003e\n            \u003cth scope=\"col\"\u003ePer 100 sq ft\u003c\/th\u003e\n          \u003c\/tr\u003e\n        \u003c\/thead\u003e\n        \u003ctbody\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eLettuce\u003c\/td\u003e\n            \u003ctd\u003e1 tbsp\u003c\/td\u003e\n            \u003ctd\u003e1.5-2 lb\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eCabbage\u003c\/td\u003e\n            \u003ctd\u003e2 tbsp\u003c\/td\u003e\n            \u003ctd\u003e3-4 lb\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eSpinach\u003c\/td\u003e\n            \u003ctd\u003e1 tsp\u003c\/td\u003e\n            \u003ctd\u003e2 lb\u003c\/td\u003e\n          \u003c\/tr\u003e\n        \u003c\/tbody\u003e\n      \u003c\/table\u003e\n    \u003c\/div\u003e\n\n    \u003ch3 class=\"brown\"\u003eHydroponic Systems\u003c\/h3\u003e\n    \u003cdiv class=\"table-scroll\"\u003e\n      \u003ctable\u003e\n        \u003ccaption\u003eMaintain target EC of 1.5-2.5 mS\/cm total; always add calcium nitrate to reservoir before phosphate sources\u003c\/caption\u003e\n        \u003cthead\u003e\n          \u003ctr\u003e\n            \u003cth scope=\"col\"\u003eSystem\u003c\/th\u003e\n            \u003cth scope=\"col\"\u003eRate\u003c\/th\u003e\n            \u003cth scope=\"col\"\u003eEC Contribution\u003c\/th\u003e\n          \u003c\/tr\u003e\n        \u003c\/thead\u003e\n        \u003ctbody\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eNFT \/ DWC\u003c\/td\u003e\n            \u003ctd\u003e1-2 tsp \/ gal\u003c\/td\u003e\n            \u003ctd\u003e0.5-1.0 mS\/cm\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eEbb \u0026amp; Flow\u003c\/td\u003e\n            \u003ctd\u003e1.5 tsp \/ gal\u003c\/td\u003e\n            \u003ctd\u003e0.75 mS\/cm\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eDrip \/ DTW\u003c\/td\u003e\n            \u003ctd\u003e1 tsp \/ gal\u003c\/td\u003e\n            \u003ctd\u003e0.5 mS\/cm\u003c\/td\u003e\n          \u003c\/tr\u003e\n        \u003c\/tbody\u003e\n      \u003c\/table\u003e\n    \u003c\/div\u003e\n\n    \u003ch3 class=\"brown\"\u003eFoliar Application\u003c\/h3\u003e\n    \u003cdiv class=\"table-scroll\"\u003e\n      \u003ctable\u003e\n        \u003ccaption\u003eSpray early morning or evening to avoid leaf burn; test on a small area first if unfamiliar with foliar application\u003c\/caption\u003e\n        \u003cthead\u003e\n          \u003ctr\u003e\n            \u003cth scope=\"col\"\u003eCrop\u003c\/th\u003e\n            \u003cth scope=\"col\"\u003eRate\u003c\/th\u003e\n            \u003cth scope=\"col\"\u003eCoverage\u003c\/th\u003e\n          \u003c\/tr\u003e\n        \u003c\/thead\u003e\n        \u003ctbody\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eTomatoes \/ Peppers\u003c\/td\u003e\n            \u003ctd\u003e1-2 tbsp \/ gal\u003c\/td\u003e\n            \u003ctd\u003e100-200 sq ft\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eFruit Trees\u003c\/td\u003e\n            \u003ctd\u003e2 tbsp \/ gal\u003c\/td\u003e\n            \u003ctd\u003e5-10 trees\u003c\/td\u003e\n          \u003c\/tr\u003e\n          \u003ctr\u003e\n            \u003ctd\u003eVegetables\u003c\/td\u003e\n            \u003ctd\u003e1 tbsp \/ gal\u003c\/td\u003e\n            \u003ctd\u003e200 sq ft\u003c\/td\u003e\n          \u003c\/tr\u003e\n        \u003c\/tbody\u003e\n      \u003c\/table\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003c!-- ══════════════════ 5. HOW TO USE ══════════════════ --\u003e\n\u003cdetails\u003e\n  \u003csummary\u003e\u003cspan class=\"green\"\u003eHOW TO USE\u003c\/span\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"details-content\"\u003e\n\n    \u003ch3 class=\"brown\"\u003eSoil \u0026amp; Garden Beds\u003c\/h3\u003e\n    \u003col\u003e\n      \u003cli\u003eDetermine your application rate based on crop type (see Application Rates above).\u003c\/li\u003e\n      \u003cli\u003eScatter calcium nitrate granules evenly over the soil surface around the drip line of plants.\u003c\/li\u003e\n      \u003cli\u003eLightly work into the top 2-3 inches of soil with a rake or cultivator.\u003c\/li\u003e\n      \u003cli\u003eWater thoroughly immediately after application to dissolve granules and move calcium into the root zone.\u003c\/li\u003e\n      \u003cli\u003eReapply every 2-3 weeks during active growth and fruit development.\u003c\/li\u003e\n    \u003c\/ol\u003e\n\n    \u003ch3 class=\"brown\"\u003eContainer \u0026amp; Potted Plants\u003c\/h3\u003e\n    \u003col\u003e\n      \u003cli\u003eDissolve 1 tsp of calcium nitrate per gallon of water.\u003c\/li\u003e\n      \u003cli\u003eWater plants normally with the solution until it drains from the bottom.\u003c\/li\u003e\n      \u003cli\u003eApply every 2 weeks during the growing season.\u003c\/li\u003e\n      \u003cli\u003eFor heavy-feeding plants like tomatoes, increase to 1.5 tsp per gallon during fruit set.\u003c\/li\u003e\n    \u003c\/ol\u003e\n\n    \u003ch3 class=\"brown\"\u003eHydroponic Systems\u003c\/h3\u003e\n    \u003col\u003e\n      \u003cli\u003eAdd calcium nitrate to your reservoir FIRST, before any other nutrients.\u003c\/li\u003e\n      \u003cli\u003eDissolve 1-2 tsp per gallon and stir until fully dissolved.\u003c\/li\u003e\n      \u003cli\u003eCheck EC — calcium nitrate contributes approximately 0.5-1.0 mS\/cm.\u003c\/li\u003e\n      \u003cli\u003eAdd phosphorus and potassium sources SEPARATELY after calcium nitrate is fully dissolved.\u003c\/li\u003e\n      \u003cli\u003eMonitor pH and adjust to 5.5-6.5; note that calcium uptake is optimal in the 6.0-6.5 range.\u003c\/li\u003e\n    \u003c\/ol\u003e\n\n    \u003ch3 class=\"brown\"\u003eFoliar Spray\u003c\/h3\u003e\n    \u003col\u003e\n      \u003cli\u003eDissolve 1-2 tbsp per gallon of water in a sprayer.\u003c\/li\u003e\n      \u003cli\u003eApply early morning or evening when stomata are open and temperatures are below 85°F.\u003c\/li\u003e\n      \u003cli\u003eIf you've not used calcium nitrate as a foliar spray before, test on a small area first and wait 24 hours before treating the full crop.\u003c\/li\u003e\n      \u003cli\u003eSpray both upper and lower leaf surfaces until lightly dripping.\u003c\/li\u003e\n      \u003cli\u003eRepeat weekly during periods of rapid growth, drought stress, or visible calcium deficiency.\u003c\/li\u003e\n    \u003c\/ol\u003e\n\n    \u003cdiv class=\"info-box\"\u003e\n      \u003ch3 class=\"teal\"\u003ePro Tip: Timing Is Everything for BER Prevention\u003c\/h3\u003e\n      \u003cp\u003eThe critical window for preventing blossom end rot is when fruits are walnut-sized — this is when calcium demand spikes. Start calcium nitrate applications at this stage and maintain consistent soil moisture. Inconsistent watering disrupts calcium transport more than low soil calcium levels, because calcium can only travel through the plant via xylem flow driven by transpiration — it cannot be redirected through the phloem once delivered. Mulching 3-4 inches deep helps maintain even moisture between waterings.\u003c\/p\u003e\n    \u003c\/div\u003e\n\n    \u003ch3 class=\"brown\"\u003eWhen Calcium Nitrate Is the Right Choice\u003c\/h3\u003e\n    \u003cul class=\"feature-list\"\u003e\n      \u003cli\u003ePreventing or reducing the risk of blossom end rot in tomatoes, peppers, squash, and melons\u003c\/li\u003e\n      \u003cli\u003eProviding fast-acting nitrogen and calcium simultaneously\u003c\/li\u003e\n      \u003cli\u003eHydroponic systems needing a clean calcium + nitrogen source\u003c\/li\u003e\n      \u003cli\u003eFoliar correction of calcium deficiency during rapid growth\u003c\/li\u003e\n      \u003cli\u003eAreas with phosphorus runoff restrictions (0% P formula)\u003c\/li\u003e\n    \u003c\/ul\u003e\n\n    \u003ch3 class=\"brown\"\u003eWhen to Consider Other Options\u003c\/h3\u003e\n    \u003cul class=\"feature-list\"\u003e\n      \u003cli\u003eIf you also need magnesium and iron — use \u003ca href=\"\/products\/cal-mag-plus-2-0-0-concentrate\" target=\"_blank\" rel=\"noopener\"\u003eCal-Mag Plus 2-0-0\u003c\/a\u003e instead or alongside\u003c\/li\u003e\n      \u003cli\u003eIf your soil needs long-term calcium building without nitrogen — use \u003ca href=\"\/products\/gypsum\" target=\"_blank\" rel=\"noopener\"\u003eGypsum (Calcium Sulfate)\u003c\/a\u003e\n\u003c\/li\u003e\n      \u003cli\u003eIf your primary goal is raising pH in acidic soil — use \u003ca href=\"\/products\/dolomite-lime\" target=\"_blank\" rel=\"noopener\"\u003eDolomite Lime\u003c\/a\u003e\n\u003c\/li\u003e\n      \u003cli\u003eIf you need nitrogen but not calcium — use \u003ca href=\"\/products\/ammonium-sulfate-21-0-0-fertilizer\" target=\"_blank\" rel=\"noopener\"\u003eAmmonium Sulfate 21-0-0\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003c!-- ══════════════════ 6. CALCULATOR ══════════════════ --\u003e\n\u003cdetails\u003e\n  \u003csummary\u003e\u003cspan class=\"green\"\u003eCALCIUM NITRATE CALCULATOR\u003c\/span\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"details-content\"\u003e\n    \u003cdiv class=\"gwb-calculator\" data-calc=\"calcium-nitrate\"\u003e\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003c!-- ══════════════════ 7. SAFETY \u0026 HANDLING ══════════════════ --\u003e\n\u003cdetails\u003e\n  \u003csummary\u003e\u003cspan class=\"green\"\u003eSAFETY \u0026amp; HANDLING\u003c\/span\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"details-content\"\u003e\n\n    \u003cdetails class=\"nested-details\"\u003e\n      \u003csummary\u003ePersonal Protective Equipment (PPE)\u003c\/summary\u003e\n      \u003cdiv\u003e\n        \u003cul class=\"feature-list\"\u003e\n          \u003cli\u003eWear chemical-resistant gloves (nitrile recommended) when handling dry granules or concentrated solutions\u003c\/li\u003e\n          \u003cli\u003eWear safety glasses or goggles to prevent eye contact with dust\u003c\/li\u003e\n          \u003cli\u003eUse a dust mask or N95 respirator when handling large quantities in enclosed spaces\u003c\/li\u003e\n          \u003cli\u003eWash hands and exposed skin thoroughly after handling\u003c\/li\u003e\n        \u003c\/ul\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails class=\"nested-details\"\u003e\n      \u003csummary\u003eStorage Guidelines\u003c\/summary\u003e\n      \u003cdiv\u003e\n        \u003cul class=\"feature-list\"\u003e\n          \u003cli\u003eStore in a cool, dry place in the original sealed container\u003c\/li\u003e\n          \u003cli\u003eCalcium nitrate is hygroscopic — absorbs moisture from air. Reseal bags tightly after each use\u003c\/li\u003e\n          \u003cli\u003eKeep away from direct sunlight and heat sources\u003c\/li\u003e\n          \u003cli\u003eStore separately from phosphate fertilizers and organic materials\u003c\/li\u003e\n          \u003cli\u003eKeep out of reach of children and pets\u003c\/li\u003e\n        \u003c\/ul\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails class=\"nested-details\"\u003e\n      \u003csummary\u003eApplication Precautions\u003c\/summary\u003e\n      \u003cdiv\u003e\n        \u003cul class=\"feature-list\"\u003e\n          \u003cli\u003eNever mix directly with phosphate fertilizers (MAP, DAP, MKP) — causes immediate precipitation\u003c\/li\u003e\n          \u003cli\u003eIn hydroponics: add calcium nitrate to the reservoir FIRST, then add phosphates separately\u003c\/li\u003e\n          \u003cli\u003eFor foliar spray, apply when temperatures are below 85°F to avoid leaf burn; test on a small area first\u003c\/li\u003e\n          \u003cli\u003eWater soil thoroughly after dry application to prevent salt buildup on roots\u003c\/li\u003e\n          \u003cli\u003eDo not apply to wilted or drought-stressed plants — water first, then fertilize\u003c\/li\u003e\n        \u003c\/ul\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails class=\"nested-details\"\u003e\n      \u003csummary\u003eFirst Aid\u003c\/summary\u003e\n      \u003cdiv\u003e\n        \u003cul class=\"feature-list\"\u003e\n          \u003cli\u003e\n\u003cstrong\u003eEye contact:\u003c\/strong\u003e Flush with clean water for 15 minutes. Remove contact lenses if present. Seek medical attention if irritation persists\u003c\/li\u003e\n          \u003cli\u003e\n\u003cstrong\u003eSkin contact:\u003c\/strong\u003e Wash affected area with soap and water. Remove contaminated clothing\u003c\/li\u003e\n          \u003cli\u003e\n\u003cstrong\u003eIngestion:\u003c\/strong\u003e Do not induce vomiting. Rinse mouth with water. Contact Poison Control (1-800-222-1222) or seek medical attention\u003c\/li\u003e\n          \u003cli\u003e\n\u003cstrong\u003eInhalation:\u003c\/strong\u003e Move to fresh air immediately. Seek medical attention if coughing or difficulty breathing persists\u003c\/li\u003e\n        \u003c\/ul\u003e\n        \u003cp\u003eRefer to the \u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0850\/0900\/files\/Ammonium_Calcium_Nitrate_SDS.pdf?v=1743089274\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eSafety Data Sheet (SDS)\u003c\/a\u003e for complete safety information.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdiv id=\"gwb-newsletter-mid\"\u003e\u003c\/div\u003e\n\n\u003c!-- ══════════════════ 8. COMPLETE YOUR SYSTEM ══════════════════ --\u003e\n\u003cdetails\u003e\n  \u003csummary\u003e\u003cspan class=\"green\"\u003eCOMPLETE YOUR SYSTEM\u003c\/span\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"details-content\"\u003e\n    \u003cp\u003eCalcium nitrate provides nitrogen and calcium — build a complete nutrition program with these complementary products.\u003c\/p\u003e\n    \u003cdiv class=\"pairs-grid\"\u003e\n      \u003ca href=\"\/products\/potassium-sulfate-0-0-53\" class=\"pair-item\" target=\"_blank\" rel=\"noopener\"\u003e\n        \u003cspan class=\"pair-badge\"\u003eEssential\u003c\/span\u003e\n        \u003ch3\u003ePotassium Sulfate 0-0-53\u003c\/h3\u003e\n        \u003cp\u003eAdd potassium for fruit quality, disease resistance, and water regulation. Calcium nitrate provides N+Ca — this completes the K.\u003c\/p\u003e\n      \u003c\/a\u003e\n      \u003ca href=\"\/products\/monopotassium-phosphate-mkp-0-52-34\" class=\"pair-item\" target=\"_blank\" rel=\"noopener\"\u003e\n        \u003cspan class=\"pair-badge\"\u003eEssential\u003c\/span\u003e\n        \u003ch3\u003eMKP 0-52-34\u003c\/h3\u003e\n        \u003cp\u003ePhosphorus and potassium for flowering and fruiting. Always add to the reservoir separately from calcium nitrate.\u003c\/p\u003e\n      \u003c\/a\u003e\n      \u003ca href=\"\/products\/magnesium-sulfate-epsom-salt\" class=\"pair-item\" target=\"_blank\" rel=\"noopener\"\u003e\n        \u003cspan class=\"pair-badge badge-optional\"\u003eRecommended\u003c\/span\u003e\n        \u003ch3\u003eEpsom Salt (Magnesium Sulfate)\u003c\/h3\u003e\n        \u003cp\u003eComplements calcium with magnesium for complete secondary nutrient coverage. Essential for chlorophyll production.\u003c\/p\u003e\n      \u003c\/a\u003e\n      \u003ca href=\"\/products\/chelated-iron-dtpa\" class=\"pair-item\" target=\"_blank\" rel=\"noopener\"\u003e\n        \u003cspan class=\"pair-badge badge-optional\"\u003eRecommended\u003c\/span\u003e\n        \u003ch3\u003eChelated Iron DTPA 11%\u003c\/h3\u003e\n        \u003cp\u003ePrevent iron chlorosis alongside calcium nutrition. Essential micronutrient for hydroponic systems and alkaline soils.\u003c\/p\u003e\n      \u003c\/a\u003e\n      \u003ca href=\"\/products\/cal-mag-plus-2-0-0-concentrate\" class=\"pair-item\" target=\"_blank\" rel=\"noopener\"\u003e\n        \u003cspan class=\"pair-badge badge-optional\"\u003eOptional\u003c\/span\u003e\n        \u003ch3\u003eCal-Mag Plus 2-0-0\u003c\/h3\u003e\n        \u003cp\u003eAll-in-one calcium, magnesium, and iron supplement. Ideal for RO water, coco coir, and LED-lit grows where Cal-Mag demand is higher.\u003c\/p\u003e\n      \u003c\/a\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003c!-- ══════════════════ 9. FAQ ══════════════════ --\u003e\n\u003cdetails\u003e\n  \u003csummary\u003e\u003cspan class=\"green\"\u003eFREQUENTLY ASKED QUESTIONS\u003c\/span\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"details-content\"\u003e\n\n    \u003cdetails class=\"nested-details\"\u003e\n      \u003csummary\u003eWhat is calcium nitrate and what does it do?\u003c\/summary\u003e\n      \u003cdiv\u003e\n        \u003cp\u003eCalcium nitrate (15.5-0-0) is a water-soluble fertilizer that provides fast-acting nitrogen (as nitrate and ammonium forms) plus 19% calcium as Ca²⁺ ions. It dissolves completely for immediate plant availability and can be highly effective for preventing blossom end rot, strengthening cell walls, and supporting vigorous growth. Learn more in our guide to \u003ca href=\"\/blogs\/gardening-articles\/what-is-the-best-calcium-fertilizer\" target=\"_blank\" rel=\"noopener\"\u003echoosing the right calcium fertilizer\u003c\/a\u003e.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails class=\"nested-details\"\u003e\n      \u003csummary\u003eDoes calcium nitrate prevent blossom end rot?\u003c\/summary\u003e\n      \u003cdiv\u003e\n        \u003cp\u003eCalcium nitrate can significantly reduce the risk of blossom end rot in tomatoes, peppers, cucumbers, squash, and melons. Apply when fruits are walnut-sized and continue every 2 weeks during fruit development. Consistent watering is equally important — inconsistent moisture disrupts calcium transport even when soil calcium is adequate, because calcium travels through the plant only via xylem flow and cannot be redistributed once delivered.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails class=\"nested-details\"\u003e\n      \u003csummary\u003eWhen should I apply calcium nitrate?\u003c\/summary\u003e\n      \u003cdiv\u003e\n        \u003cp\u003eApply at planting for baseline nutrition, then again when fruits are walnut-sized — the critical period when calcium demand peaks. Continue maintenance applications every 2-3 weeks. Also apply after heavy rain (which leaches calcium) or during drought stress (which impairs calcium uptake). For a complete guide on nitrogen timing and sources, see our article on \u003ca href=\"\/blogs\/gardening-articles\/best-nitrogen-fertilizer\" target=\"_blank\" rel=\"noopener\"\u003ethe best nitrogen fertilizers\u003c\/a\u003e.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails class=\"nested-details\"\u003e\n      \u003csummary\u003eCan I use calcium nitrate in hydroponics?\u003c\/summary\u003e\n      \u003cdiv\u003e\n        \u003cp\u003eYes. Use 1-2 tsp per gallon for an EC contribution of 0.5-1.0 mS\/cm. Always add calcium nitrate to the reservoir first, before phosphate sources — mixing them directly causes calcium phosphate precipitation. Works well in NFT, DWC, ebb and flow, and drip systems. See our complete \u003ca href=\"\/blogs\/gardening-articles\/what-are-the-best-fertilizers-to-use-in-hydroponics\" target=\"_blank\" rel=\"noopener\"\u003eguide to hydroponic fertilizers\u003c\/a\u003e.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails class=\"nested-details\"\u003e\n      \u003csummary\u003eHow does calcium nitrate compare to gypsum or lime?\u003c\/summary\u003e\n      \u003cdiv\u003e\n        \u003cp\u003eCalcium nitrate provides immediately available calcium AND nitrogen, dissolves 100% in water, and has a near-neutral pH effect. Gypsum is slow-releasing and better suited for clay soil improvement or long-term calcium building without nitrogen. Lime raises soil pH and takes weeks to release calcium. For rapid deficiency correction, calcium nitrate is generally the most practical choice.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails class=\"nested-details\"\u003e\n      \u003csummary\u003eShould I use calcium nitrate or Cal-Mag Plus?\u003c\/summary\u003e\n      \u003cdiv\u003e\n        \u003cp\u003eIt depends on your needs. Calcium nitrate delivers higher concentrations of both nitrogen (15.5%) and calcium (19%). Cal-Mag Plus provides lower amounts but also includes magnesium and iron — making it well-suited for RO water, coco coir, and situations where multiple secondary nutrients are deficient. Many hydroponic growers use both: calcium nitrate as the primary calcium\/nitrogen source and Cal-Mag Plus as a secondary supplement.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails class=\"nested-details\"\u003e\n      \u003csummary\u003eCan I mix calcium nitrate with other fertilizers?\u003c\/summary\u003e\n      \u003cdiv\u003e\n        \u003cp\u003eNever mix directly with phosphate solutions (MAP, DAP, MKP) — this causes immediate calcium phosphate precipitation. In hydroponics, add calcium nitrate to the reservoir first, then add phosphate sources separately. When using unfamiliar combinations, use separate stock tanks and perform a jar test before injecting into your system. Calcium nitrate is compatible with most other nutrients including potassium sulfate, Epsom salt, and micronutrient chelates when each is fully dissolved in water first.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails class=\"nested-details\"\u003e\n      \u003csummary\u003eDoes calcium nitrate help with tip burn in lettuce?\u003c\/summary\u003e\n      \u003cdiv\u003e\n        \u003cp\u003eTip burn in lettuce, cabbage, and other leafy greens is often linked to insufficient calcium delivery to fast-growing inner leaves. Calcium nitrate applications at 1.5-2 lb per 100 sq ft, or 1 tbsp per gallon as a foliar spray, may help reduce tip burn risk. The nitrate nitrogen also promotes vigorous leaf growth. For more on lettuce nutrition, see our article on \u003ca href=\"\/blogs\/gardening-articles\/what-is-the-best-fertilizer-for-lettuce\" target=\"_blank\" rel=\"noopener\"\u003ethe best fertilizer for lettuce\u003c\/a\u003e.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails class=\"nested-details\"\u003e\n      \u003csummary\u003eCan calcium nitrate prevent bitter pit in apples?\u003c\/summary\u003e\n      \u003cdiv\u003e\n        \u003cp\u003eCalcium nitrate is widely used in orchards to help prevent bitter pit in apples and pears. Apply as a foliar spray at 2 tbsp per gallon, starting at petal fall and continuing every 2-3 weeks through fruit development. Multiple applications spread over the season tend to be more effective than a single heavy application.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails class=\"nested-details\"\u003e\n      \u003csummary\u003eWill calcium nitrate change my soil pH?\u003c\/summary\u003e\n      \u003cdiv\u003e\n        \u003cp\u003eCalcium nitrate has a near-neutral pH effect under normal use — it won't acidify soil like ammonium sulfate or raise pH like lime. This makes it well-suited for repeated applications without requiring pH correction in most soils. In hydroponic systems, monitor pH as usual and target 5.5-6.5; calcium uptake is generally optimal in the 6.0-6.5 range.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003c!-- ══════════════════ 10. GROW WITH CONFIDENCE ══════════════════ --\u003e\n\u003cdetails\u003e\n  \u003csummary\u003e\u003cspan class=\"green\"\u003eGROW WITH CONFIDENCE\u003c\/span\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"details-content\"\u003e\n\n    \u003cdetails class=\"nested-details\"\u003e\n      \u003csummary\u003eProduct Quality Guaranteed\u003c\/summary\u003e\n      \u003cdiv\u003e\n        \u003cul class=\"feature-list\"\u003e\n          \u003cli\u003eCDFA Registered — California Department of Food \u0026amp; Agriculture\u003c\/li\u003e\n          \u003cli\u003eCommercial Grade — same quality trusted by professional growers\u003c\/li\u003e\n          \u003cli\u003eMade in USA — manufactured in California since 1989\u003c\/li\u003e\n          \u003cli\u003eTested for Heavy Metals — third-party laboratory tested, results consistently well below required limits\u003c\/li\u003e\n          \u003cli\u003e100% Water Soluble — solution grade for all application methods\u003c\/li\u003e\n        \u003c\/ul\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails class=\"nested-details\"\u003e\n      \u003csummary\u003e90-Day Satisfaction Guarantee\u003c\/summary\u003e\n      \u003cdiv\u003e\n        \u003cp\u003eWe stand behind every product with a 90-day money-back guarantee. If you're not completely satisfied with your purchase, contact our team for a full refund — no questions asked.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails class=\"nested-details\"\u003e\n      \u003csummary\u003eExpert Support Included\u003c\/summary\u003e\n      \u003cdiv\u003e\n        \u003cp\u003eOur agricultural specialists are available to answer your questions about application rates, compatibility, nutrient programs, and growing strategies. Email us anytime at \u003ca href=\"mailto:questions@greenwaybiotech.com\"\u003equestions@greenwaybiotech.com\u003c\/a\u003e.\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/details\u003e\n\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003c!-- ══════════════════ 11. DOCUMENTS ══════════════════ --\u003e\n\u003cdetails\u003e\n  \u003csummary\u003e\u003cspan class=\"green\"\u003eDOCUMENTS\u003c\/span\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"details-content\"\u003e\n    \u003cul class=\"doc-links\"\u003e\n      \u003cli\u003e📄 \u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0850\/0900\/files\/Ammonium_Calcium_Nitrate_SDS.pdf?v=1743089274\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eSafety Data Sheet (SDS)\u003c\/a\u003e\n\u003c\/li\u003e\n      \u003cli\u003e📋 \u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0850\/0900\/files\/Ammonium_Calcium_Nitrate_15.5-0-0_CDFA.pdf?v=1743089287\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eProduct Label (CDFA)\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003c!-- ══════════════════ 12. DISCOVER MORE ══════════════════ --\u003e\n\u003cdetails\u003e\n  \u003csummary\u003e\u003cspan class=\"green\"\u003eDISCOVER MORE\u003c\/span\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"details-content\"\u003e\n    \u003cul class=\"discover-list\"\u003e\n      \u003cli\u003e\u003ca href=\"\/blogs\/gardening-articles\/what-is-the-best-calcium-fertilizer\" target=\"_blank\" rel=\"noopener\"\u003eWhat is the Best Calcium Fertilizer? — Compare calcium sources for your garden\u003c\/a\u003e\u003c\/li\u003e\n      \u003cli\u003e\u003ca href=\"\/blogs\/gardening-articles\/whats-the-function-of-calcium-ca-in-plants\" target=\"_blank\" rel=\"noopener\"\u003eWhy Calcium is Crucial for Plant Growth — Deficiency signs, prevention, and correction\u003c\/a\u003e\u003c\/li\u003e\n      \u003cli\u003e\u003ca href=\"\/blogs\/gardening-articles\/best-water-soluble-fertilizer\" target=\"_blank\" rel=\"noopener\"\u003eTop Water-Soluble Fertilizers — Complete guide for home and commercial growers\u003c\/a\u003e\u003c\/li\u003e\n      \u003cli\u003e\u003ca href=\"\/blogs\/gardening-articles\/best-fertilizer-for-tomatoes\" target=\"_blank\" rel=\"noopener\"\u003eBest Fertilizer for Tomatoes — NPK ratios, timing, and application tips\u003c\/a\u003e\u003c\/li\u003e\n      \u003cli\u003e\u003ca href=\"\/blogs\/gardening-articles\/what-are-the-best-fertilizers-to-use-in-hydroponics\" target=\"_blank\" rel=\"noopener\"\u003eBest Fertilizers for Hydroponics — Nutrient programs for soilless growing\u003c\/a\u003e\u003c\/li\u003e\n      \u003cli\u003e\u003ca href=\"\/blogs\/gardening-articles\/best-nitrogen-fertilizer\" target=\"_blank\" rel=\"noopener\"\u003eBest Nitrogen Fertilizer — Sources, forms, and application strategies compared\u003c\/a\u003e\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003c!-- ══════════════════ 13. HAVE QUESTIONS? ══════════════════ --\u003e\n\u003cdetails\u003e\n  \u003csummary\u003e\u003cspan class=\"green\"\u003eHAVE QUESTIONS?\u003c\/span\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"details-content\"\u003e\n    \u003cp\u003eCheck out our \u003ca href=\"\/pages\/faq\" target=\"_blank\" rel=\"noopener noreferrer\"\u003efull FAQ page\u003c\/a\u003e or contact our experts for personalized advice.\u003c\/p\u003e\n    \u003cp\u003e📧 \u003ca href=\"mailto:questions@greenwaybiotech.com\"\u003equestions@greenwaybiotech.com\u003c\/a\u003e\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Greenway Biotech, Inc.","offers":[{"title":"2 Pounds","offer_id":47862885679322,"sku":"701748873726","price":24.99,"currency_code":"USD","in_stock":true},{"title":"5 Pounds","offer_id":47862885712090,"sku":"701748874051","price":31.99,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":47862885744858,"sku":"701748874075","price":49.99,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":47862885777626,"sku":"701748874044","price":89.99,"currency_code":"USD","in_stock":true},{"title":"50 Pounds (or 2 x 25 pound bags)","offer_id":47862885810394,"sku":"018227120951","price":149.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0250\/6244\/1063\/files\/Ammonium_Calcium_Nitrate_Fertilizer_15.5-0-0_Solution_Grade.jpg?v=1778681114","url":"https:\/\/midwestgrowco.com\/products\/calcium-nitrate-fertilizer-15-5-0-0-ammonia-calcium-nitrate-15-5-0-0","provider":"Midwest Grow LLC","version":"1.0","type":"link"}