{"title":"Calcium \u0026 Magnesium","description":"\u003cp\u003eCalcium and magnesium are the secondary nutrients behind the most common garden failures — blossom end rot in tomatoes and peppers, tip burn in lettuce, and the yellowing between leaf veins that means magnesium has run out. Calcium builds cell walls and doesn't move within the plant, so it has to be supplied continuously; magnesium sits at the center of every chlorophyll molecule, which is why deficiency shows as fading color. This collection covers every delivery method: Cal-Mag Plus 2-0-0 for one-step feeding, Calcium Nitrate and Magnesium Nitrate for hydroponic reservoirs, Epsom Salt for fast foliar correction, and Gypsum and Dolomite for amending soil at the source. Every product is CDFA registered, third-party tested for heavy metals, and made in our FDA-registered Madera, California facility. One rule keeps every mix clean: dissolve calcium separately from phosphate and sulfate concentrates — they belong in the same garden, not the same bucket.\u003c\/p\u003e","products":[{"product_id":"organic-azomite-powder-fertilizer","title":"Organic Azomite Powder Fertilizer 0-0-0.2 (Micronized)","description":"\u003cp\u003eOrganic Azomite 0-0-0.2 Micronized is an OMRI Listed natural mineral soil amendment mined from a single hydrated sodium calcium aluminosilicate (HSCAS) deposit in central Utah — volcanic ash that settled into a mineral-rich seabed roughly 30 million years ago. One product supplies approximately 70 trace and ultra-trace elements, including silica, calcium, magnesium, iron, manganese, zinc, boron, and rare earth elements.\u003c\/p\u003e\n\u003cp\u003eTrace minerals act as cofactors for the enzymatic reactions behind plant metabolism — the work that standard N-P-K fertilizers do not address. Azomite is a long-cycle remineralizer best suited to soils depleted by years of intensive cropping and irrigation, with cumulative benefits typically seen over two to three growing seasons of regular use. It works across vegetable gardens, fruit trees, lawns, and greenhouse potting mixes, and is micronized to roughly −200 mesh for even broadcast distribution and good soil contact.\u003c\/p\u003e\n\u003cp\u003eAzomite is a soil-building amendment, not a primary fertilizer — it supplies almost no nitrogen, phosphorus, or potassium, so it should be paired with a complete fertilizer program. It is largely insoluble and is not intended as a hydroponic reservoir nutrient. It is also approved as a livestock and poultry feed supplement, a separate use that should follow species-specific feed guidance. Work it into the soil, water in, minimize dust when handling, and store sealed and dry.\u003c\/p\u003e\n\u003cp\u003eOMRI Listed and independently lab tested, with heavy metal results consistently well below required limits.\u003c\/p\u003e","brand":"Greenway Biotech, Inc.","offers":[{"title":"1 Pound","offer_id":1476115841,"sku":"701748874143","price":19.99,"currency_code":"USD","in_stock":true},{"title":"2 Pounds","offer_id":1476115905,"sku":"701748874150","price":22.99,"currency_code":"USD","in_stock":true},{"title":"3 Pounds","offer_id":1476115969,"sku":"701748874167","price":24.99,"currency_code":"USD","in_stock":true},{"title":"4 Pounds","offer_id":1476116033,"sku":"701748874174","price":29.99,"currency_code":"USD","in_stock":true},{"title":"5 Pounds","offer_id":1476116097,"sku":"701748874181","price":31.99,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":1476116161,"sku":"701748874211","price":41.99,"currency_code":"USD","in_stock":true},{"title":"15 Pounds","offer_id":1476116225,"sku":"701748874280","price":45.99,"currency_code":"USD","in_stock":true},{"title":"20 Pounds","offer_id":1476116289,"sku":"018227120111","price":49.99,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":1476116353,"sku":"0701748873993","price":57.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0850\/0900\/products\/Rose_and_Flower_Fertilizer.JPG?v=1778389555"},{"product_id":"organic-bone-meal-fertilizer","title":"Organic Bone Meal Fertilizer 3-15-0","description":"\u003cp\u003eOrganic Bone Meal 3-15-0 is a steam-processed bovine bone meal soil amendment supplying 15% available phosphate (P₂O₅) and 24% calcium — one of the highest organic calcium concentrations in a single amendment — plus a small amount of slow nitrogen.\u003c\/p\u003e\n\u003cp\u003ePhosphorus drives root development, flowering, and fruit set, and in bone meal it is released gradually over roughly 3 to 4 months as soil microbes break down the bone matrix — a sustained curve rather than the spike-and-tail of fast-release synthetic phosphates, with low burn risk when used as directed. The 24% calcium supports cell-wall strength and root development. Bone meal is a go-to amendment for flowering bulbs, transplants, root crops, fruiting vegetables, roses, and fruit trees, worked into the soil at planting.\u003c\/p\u003e\n\u003cp\u003eIt is a soil amendment, not a water-soluble product — it cannot be used in hydroponic systems or as a foliar spray, and it performs best in soils at or below pH 7.0 with active microbial life; above roughly pH 7.5 phosphate availability drops. Because the 24% calcium is alkaline, it is not suited to acid-loving plants such as azaleas, rhododendrons, and blueberries. Always incorporate it into the soil rather than leaving it on the surface, and store sealed and dry.\u003c\/p\u003e\n\u003cp\u003eRepackaged from OMRI Listed® organic, non-GMO source material. CDFA registered and third-party lab tested for heavy metals, with results consistently well below required limits.\u003c\/p\u003e","brand":"Greenway Biotech, Inc.","offers":[{"title":"2 Pounds","offer_id":1476319105,"sku":"018227120166","price":19.99,"currency_code":"USD","in_stock":true},{"title":"5 Pounds","offer_id":1476319297,"sku":"726670283412","price":29.99,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":1476319361,"sku":"701748873832","price":47.99,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":1476319553,"sku":"726670283429","price":76.99,"currency_code":"USD","in_stock":true},{"title":"50 Pounds (or 2 x 25 pound bags)","offer_id":1476319617,"sku":"018227120173","price":149.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0850\/0900\/files\/Organic_Bone_Meal_Fertilizer_3-15-0_2_Pounds_157347cc-0529-4c86-a259-522efa80aabf.png?v=1781143127"},{"product_id":"calcium-carbonate","title":"Calcium Carbonate - Chalk Paint Additive","description":"\u003c!-- ═══════════════════════════════════════════════════════════════\n     Calcium Carbonate Chalk Paint Additive — Greenway Biotech Product Page\n     Version: 2.6.7 | Updated: February 2026\n     Architecture: Modular CSS + Dispatcher Calculator Pattern\n     Product Type: Craft \/ DIY (Non-Fertilizer)\n     Blog Articles Linked: 0\n     Blog Articles TODO: 2 needed\n     ═══════════════════════════════════════════════════════════════ --\u003e\n\n\u003cdiv class=\"gwb-product\"\u003e\n\u003cdiv class=\"wrapper\"\u003e\n\n  \u003c!-- HERO --\u003e\n  \u003ch1\u003e\n\u003cspan class=\"green\"\u003eCalcium Carbonate\u003c\/span\u003e Chalk Paint Additive\u003c\/h1\u003e\n  \u003cp class=\"hero-subtitle\"\u003ePremium 200 Mesh fine powder for professional-grade DIY chalk paint and furniture restoration. Transform any latex paint into beautiful, velvety chalk paint at a fraction of boutique prices.\u003c\/p\u003e\n\n  \u003c!-- TRUST BADGES --\u003e\n  \u003cdiv class=\"trust-badges\"\u003e\n    \u003cspan class=\"badge\" aria-label=\"Lab Tested for Purity\"\u003e🔬 Lab Tested for Purity\u003c\/span\u003e\n    \u003ca href=\"\/pages\/about-us\" target=\"_blank\" rel=\"noopener noreferrer\" 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 noreferrer\" 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\"\u003eFurniture Restoration\u003c\/div\u003e\n        \u003cdiv class=\"best-for-rate\"\u003e1 cup per pint of paint\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\"\u003eDIY Chalk Paint\u003c\/div\u003e\n        \u003cdiv class=\"best-for-rate\"\u003e4–8 cups per 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\"\u003eHome Décor \u0026amp; Walls\u003c\/div\u003e\n        \u003cdiv class=\"best-for-rate\"\u003e2 cups per quart\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\"\u003eStained Glass Cement\u003c\/div\u003e\n        \u003cdiv class=\"best-for-rate\"\u003eMix with linseed oil\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\"\u003eArts \u0026amp; Crafts\u003c\/div\u003e\n        \u003cdiv class=\"best-for-rate\"\u003eAdjust ratio to desired finish\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\"\u003eField Line Marking\u003c\/div\u003e\n        \u003cdiv class=\"best-for-rate\"\u003eSafe for grass \u0026amp; turf\u003c\/div\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/section\u003e\n\n  \u003c!-- ════════════════════════════════════════════ --\u003e\n  \u003c!-- DROPDOWN SECTIONS START                      --\u003e\n  \u003c!-- ════════════════════════════════════════════ --\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🔬 200 Mesh Ultra-Fine Powder\u003c\/h3\u003e\n          \u003cp\u003eConsistent 200 mesh particle size ensures smooth, lump-free mixing with any latex paint — no gritty texture or visible particles in your finished surface.\u003c\/p\u003e\n        \u003c\/div\u003e\n        \u003cdiv class=\"benefit-card\"\u003e\n          \u003ch3\u003e🎨 True Color Representation\u003c\/h3\u003e\n          \u003cp\u003ePure marble white composition won't tint or alter your paint color. What you mix is what you get — perfect for pastels, brights, and deep tones alike.\u003c\/p\u003e\n        \u003c\/div\u003e\n        \u003cdiv class=\"benefit-card\"\u003e\n          \u003ch3\u003e💰 Boutique Quality, DIY Price\u003c\/h3\u003e\n          \u003cp\u003eCreate professional-grade chalk paint for a fraction of the cost of pre-mixed brands. One 5 lb bag can make multiple gallons of chalk paint.\u003c\/p\u003e\n        \u003c\/div\u003e\n        \u003cdiv class=\"benefit-card\"\u003e\n          \u003ch3\u003e🪑 Customizable Chalkiness\u003c\/h3\u003e\n          \u003cp\u003eAdjust the calcium carbonate-to-paint ratio to achieve anything from a subtle matte finish to a heavily textured vintage look. Full control over your final result.\u003c\/p\u003e\n        \u003c\/div\u003e\n        \u003cdiv class=\"benefit-card\"\u003e\n          \u003ch3\u003e🧪 Tested for Purity\u003c\/h3\u003e\n          \u003cp\u003eIndependently lab tested to ensure consistent quality and composition. Pure calcium carbonate with no fillers, additives, or contaminants.\u003c\/p\u003e\n        \u003c\/div\u003e\n        \u003cdiv class=\"benefit-card\"\u003e\n          \u003ch3\u003e🖌️ Works with Any Latex Paint\u003c\/h3\u003e\n          \u003cp\u003eCompatible with any brand of latex paint in any color. Use flat, eggshell, or satin — the calcium carbonate converts them all into chalk paint.\u003c\/p\u003e\n        \u003c\/div\u003e\n        \u003cdiv class=\"benefit-card\"\u003e\n          \u003ch3\u003e🔧 Multi-Use Versatility\u003c\/h3\u003e\n          \u003cp\u003eBeyond chalk paint, use for stained glass cement (with linseed oil), field line marking, craft projects, and as a whiting agent for various applications.\u003c\/p\u003e\n        \u003c\/div\u003e\n        \u003cdiv class=\"benefit-card\"\u003e\n          \u003ch3\u003e📦 Long Shelf Life\u003c\/h3\u003e\n          \u003cp\u003eShelf life of 5 years when stored properly. Calcium carbonate is a stable, non-reactive mineral powder that won't degrade, clump, or lose effectiveness over time.\u003c\/p\u003e\n        \u003c\/div\u003e\n        \u003cdiv class=\"benefit-card\"\u003e\n          \u003ch3\u003e🌿 Natural Mineral Source\u003c\/h3\u003e\n          \u003cp\u003eDerived from natural limestone (calcium carbonate). A non-toxic mineral compound that's safe to handle and environmentally responsible.\u003c\/p\u003e\n        \u003c\/div\u003e\n        \u003cdiv class=\"benefit-card\"\u003e\n          \u003ch3\u003e✅ Easy Three-Ingredient Process\u003c\/h3\u003e\n          \u003cp\u003eJust calcium carbonate, water, and latex paint. No complicated formulas or specialty equipment needed — mix and apply in minutes.\u003c\/p\u003e\n        \u003c\/div\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003c!-- 2. 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\n      \u003ch3 class=\"brown\"\u003eChalk Paint Mixing Ratios\u003c\/h3\u003e\n      \u003cdiv class=\"table-scroll\"\u003e\n        \u003ctable\u003e\n          \u003cthead\u003e\n            \u003ctr\u003e\n              \u003cth\u003eProject Size\u003c\/th\u003e\n              \u003cth\u003eCalcium Carbonate\u003c\/th\u003e\n              \u003cth\u003eWater\u003c\/th\u003e\n              \u003cth\u003eLatex Paint\u003c\/th\u003e\n            \u003c\/tr\u003e\n          \u003c\/thead\u003e\n          \u003ctbody\u003e\n            \u003ctr\u003e\n              \u003ctd\u003eSmall Project\u003c\/td\u003e\n              \u003ctd\u003e1 cup (8 oz by weight)\u003c\/td\u003e\n              \u003ctd\u003e2 tablespoons\u003c\/td\u003e\n              \u003ctd\u003e1 pint\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n              \u003ctd\u003eMedium Project\u003c\/td\u003e\n              \u003ctd\u003e2 cups (16 oz by weight)\u003c\/td\u003e\n              \u003ctd\u003e4 tablespoons\u003c\/td\u003e\n              \u003ctd\u003e1 quart\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n              \u003ctd\u003eLarge Project\u003c\/td\u003e\n              \u003ctd\u003e4 cups (32 oz by weight)\u003c\/td\u003e\n              \u003ctd\u003e8 tablespoons\u003c\/td\u003e\n              \u003ctd\u003e2 quarts\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n              \u003ctd\u003eFull Gallon Batch\u003c\/td\u003e\n              \u003ctd\u003e4–8 cups\u003c\/td\u003e\n              \u003ctd\u003e½–1 cup\u003c\/td\u003e\n              \u003ctd\u003e1 gallon\u003c\/td\u003e\n            \u003c\/tr\u003e\n          \u003c\/tbody\u003e\n        \u003c\/table\u003e\n      \u003c\/div\u003e\n\n      \u003ch3 class=\"brown\"\u003eStained Glass Cement\u003c\/h3\u003e\n      \u003cdiv class=\"table-scroll\"\u003e\n        \u003ctable\u003e\n          \u003cthead\u003e\n            \u003ctr\u003e\n              \u003cth\u003eComponent\u003c\/th\u003e\n              \u003cth\u003eAmount\u003c\/th\u003e\n              \u003cth\u003eNotes\u003c\/th\u003e\n            \u003c\/tr\u003e\n          \u003c\/thead\u003e\n          \u003ctbody\u003e\n            \u003ctr\u003e\n              \u003ctd\u003eCalcium Carbonate\u003c\/td\u003e\n              \u003ctd\u003eBy consistency\u003c\/td\u003e\n              \u003ctd\u003eAdd gradually until desired thickness\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n              \u003ctd\u003eLinseed Oil\u003c\/td\u003e\n              \u003ctd\u003eBase amount\u003c\/td\u003e\n              \u003ctd\u003eStart with oil, add powder slowly\u003c\/td\u003e\n            \u003c\/tr\u003e\n          \u003c\/tbody\u003e\n        \u003c\/table\u003e\n      \u003c\/div\u003e\n\n      \u003cdiv class=\"info-box\"\u003e\n        \u003ch3 class=\"teal\"\u003eAdjusting Texture\u003c\/h3\u003e\n        \u003cp\u003eUse less calcium carbonate (4 cups per gallon) for a smoother finish, or more (up to 8 cups per gallon) for a heavier, more textured vintage look. Always dissolve the powder in water first before adding to paint to prevent clumping.\u003c\/p\u003e\n      \u003c\/div\u003e\n\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003c!-- 3. 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\"\u003eMaking Chalk Paint\u003c\/h3\u003e\n      \u003col\u003e\n        \u003cli\u003eMeasure calcium carbonate powder according to the application rates table above.\u003c\/li\u003e\n        \u003cli\u003eIn a separate container, combine the calcium carbonate with water and stir until a smooth paste forms (no lumps).\u003c\/li\u003e\n        \u003cli\u003eAdd the paste to your latex paint and stir thoroughly until fully incorporated.\u003c\/li\u003e\n        \u003cli\u003eTest on a small area or scrap surface to check consistency and color.\u003c\/li\u003e\n        \u003cli\u003eApply with a brush or roller. Chalk paint typically requires 2 coats for full coverage.\u003c\/li\u003e\n        \u003cli\u003eAllow to dry completely between coats (typically 1–2 hours depending on humidity).\u003c\/li\u003e\n        \u003cli\u003eOnce fully dry, distress with fine sandpaper if desired for a vintage look.\u003c\/li\u003e\n        \u003cli\u003eSeal with wax or a clear topcoat for durability.\u003c\/li\u003e\n      \u003c\/ol\u003e\n\n      \u003ch3 class=\"brown\"\u003eStained Glass Cement\u003c\/h3\u003e\n      \u003col\u003e\n        \u003cli\u003eStart with linseed oil in a mixing container.\u003c\/li\u003e\n        \u003cli\u003eGradually add calcium carbonate powder, mixing continuously.\u003c\/li\u003e\n        \u003cli\u003eContinue adding powder until the cement reaches the consistency of soft putty.\u003c\/li\u003e\n        \u003cli\u003eApply to stained glass seams using traditional glazing techniques.\u003c\/li\u003e\n      \u003c\/ol\u003e\n\n      \u003ch3 class=\"brown\"\u003eField Line Marking\u003c\/h3\u003e\n      \u003col\u003e\n        \u003cli\u003eUse calcium carbonate powder directly in a line marking machine or spread by hand along a guide.\u003c\/li\u003e\n        \u003cli\u003eCalcium carbonate is safe for grass and will not burn or damage turf.\u003c\/li\u003e\n      \u003c\/ol\u003e\n\n      \u003c!-- Expert Tip --\u003e\n      \u003cdiv class=\"info-box\"\u003e\n        \u003ch3 class=\"teal\"\u003ePro Tip: Eliminate Grittiness\u003c\/h3\u003e\n        \u003cp\u003eAlways dissolve your calcium carbonate in water first to create a smooth paste before adding it to paint. If you still notice slight texture after drying, lightly sand with 220-grit sandpaper between coats. Using less powder (closer to 4 cups per gallon) also produces a smoother finish.\u003c\/p\u003e\n      \u003c\/div\u003e\n\n      \u003c!-- When to Use \/ When Not Ideal --\u003e\n      \u003ch3 class=\"brown\"\u003eWhen Calcium Carbonate Is the Right Choice\u003c\/h3\u003e\n      \u003cul class=\"feature-list\"\u003e\n        \u003cli\u003eMaking DIY chalk paint from latex paint in any color\u003c\/li\u003e\n        \u003cli\u003eFurniture restoration and upcycling projects\u003c\/li\u003e\n        \u003cli\u003eStained glass cement and glazing work\u003c\/li\u003e\n        \u003cli\u003eField and sports line marking on grass\u003c\/li\u003e\n        \u003cli\u003eGeneral craft and art projects requiring a white powder base\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 need food-grade calcium carbonate for dietary supplements or cooking — use a \u003cstrong\u003efood-grade\u003c\/strong\u003e product instead\u003c\/li\u003e\n        \u003cli\u003eIf you need to write on a chalkboard surface — you need \u003cstrong\u003echalkboard paint\u003c\/strong\u003e, which is different from chalk paint\u003c\/li\u003e\n        \u003cli\u003eIf you need to whitewash fruit trees — use \u003cstrong\u003ehydrated lime\u003c\/strong\u003e instead of calcium carbonate\u003c\/li\u003e\n        \u003cli\u003eIf you need to raise soil pH — consider \u003ca href=\"\/products\/dolomite-lime\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eDolomite Lime\u003c\/a\u003e for a combined calcium and magnesium solution\u003c\/li\u003e\n      \u003c\/ul\u003e\n\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003c!-- 4. 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 a dust mask when handling dry powder to avoid inhaling fine particles\u003c\/li\u003e\n            \u003cli\u003eWear safety glasses or goggles to protect eyes from dust\u003c\/li\u003e\n            \u003cli\u003eGloves recommended for prolonged handling\u003c\/li\u003e\n            \u003cli\u003eWash hands 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\u003eKeep away from moisture — calcium carbonate can absorb water and clump\u003c\/li\u003e\n            \u003cli\u003eKeep out of reach of children and pets\u003c\/li\u003e\n            \u003cli\u003eShelf life: 5 years when stored properly\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\u003eWork in a well-ventilated area when mixing dry powder\u003c\/li\u003e\n            \u003cli\u003eAdd powder to water first (not water to powder) to minimize dust\u003c\/li\u003e\n            \u003cli\u003eThis product is not food grade — do not use for dietary or personal care purposes\u003c\/li\u003e\n            \u003cli\u003eNot suitable for aquarium use without careful testing of water hardness levels\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. 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\u003c\/li\u003e\n            \u003cli\u003e\n\u003cstrong\u003eIngestion:\u003c\/strong\u003e Do not induce vomiting. 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. Seek medical attention if respiratory symptoms persist\u003c\/li\u003e\n          \u003c\/ul\u003e\n          \u003cp\u003eRefer to the \u003ca href=\"#sds-url-pending\" 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  \u003c!-- 5. 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\u003ePair your calcium carbonate with these complementary products to get the best results from your chalk paint and craft projects.\u003c\/p\u003e\n      \u003cdiv class=\"pairs-grid\"\u003e\n        \u003ca href=\"\/products\/dolomite-lime\" class=\"pair-item\" target=\"_blank\" rel=\"noopener noreferrer\"\u003e\n          \u003ch3\u003eDolomite Lime\u003c\/h3\u003e\n          \u003cp\u003eNeed to adjust soil pH? Dolomite provides both calcium and magnesium for garden applications.\u003c\/p\u003e\n        \u003c\/a\u003e\n        \u003ca href=\"\/products\/epsom-salt\" class=\"pair-item\" target=\"_blank\" rel=\"noopener noreferrer\"\u003e\n          \u003ch3\u003eEpsom Salt\u003c\/h3\u003e\n          \u003cp\u003eMagnesium sulfate for garden use, bath soaks, and DIY beauty products — another versatile mineral from our catalog.\u003c\/p\u003e\n        \u003c\/a\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003c!-- 6. FREQUENTLY ASKED QUESTIONS --\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 do I need to make chalk paint with calcium carbonate?\u003c\/summary\u003e\n        \u003cdiv\u003e\n          \u003cp\u003eJust three ingredients: calcium carbonate powder, water, and any latex paint. Mix the calcium carbonate with water to form a smooth paste, then stir into your paint. We recommend 4–8 cups of calcium carbonate per gallon of paint, depending on the level of chalkiness you want.\u003c\/p\u003e\n        \u003c\/div\u003e\n      \u003c\/details\u003e\n\n      \u003cdetails class=\"nested-details\"\u003e\n        \u003csummary\u003eDoes calcium carbonate change the color of the paint?\u003c\/summary\u003e\n        \u003cdiv\u003e\n          \u003cp\u003eNo. Our calcium carbonate is pure marble white and will not alter or tint the color of your paint. The color you see in the can is the color you'll get in your chalk paint.\u003c\/p\u003e\n        \u003c\/div\u003e\n      \u003c\/details\u003e\n\n      \u003cdetails class=\"nested-details\"\u003e\n        \u003csummary\u003eIs it normal for homemade chalk paint to feel slightly gritty?\u003c\/summary\u003e\n        \u003cdiv\u003e\n          \u003cp\u003eSome slight texture is normal with homemade chalk paint compared to pre-mixed commercial brands. To minimize grittiness: dissolve the powder in water first before adding to paint, use a lower ratio of calcium carbonate, and lightly sand with fine-grit sandpaper between coats.\u003c\/p\u003e\n        \u003c\/div\u003e\n      \u003c\/details\u003e\n\n      \u003cdetails class=\"nested-details\"\u003e\n        \u003csummary\u003eCan I use this calcium carbonate for food or personal care?\u003c\/summary\u003e\n        \u003cdiv\u003e\n          \u003cp\u003eNo. This is not food grade calcium carbonate. It should not be consumed orally or used for personal care products like toothpaste. For dietary or personal care applications, please use a food-grade or pharmaceutical-grade product.\u003c\/p\u003e\n        \u003c\/div\u003e\n      \u003c\/details\u003e\n\n      \u003cdetails class=\"nested-details\"\u003e\n        \u003csummary\u003eWhat is the difference between chalk paint and chalkboard paint?\u003c\/summary\u003e\n        \u003cdiv\u003e\n          \u003cp\u003eChalk paint creates a matte, vintage-style finish on furniture and surfaces. Chalkboard paint creates a surface you can write on with chalk. They are completely different products. Calcium carbonate is used to make chalk paint, not chalkboard paint.\u003c\/p\u003e\n        \u003c\/div\u003e\n      \u003c\/details\u003e\n\n      \u003cdetails class=\"nested-details\"\u003e\n        \u003csummary\u003eWhat is the mesh size and why does it matter?\u003c\/summary\u003e\n        \u003cdiv\u003e\n          \u003cp\u003eOur calcium carbonate is 200 mesh, meaning the particles pass through a 200 lines-per-inch screen. This ultra-fine consistency is what allows smooth, even mixing with paint. Coarser powders can leave visible grit in your finished surface.\u003c\/p\u003e\n        \u003c\/div\u003e\n      \u003c\/details\u003e\n\n      \u003cdetails class=\"nested-details\"\u003e\n        \u003csummary\u003eCan I use calcium carbonate to mark lines on grass?\u003c\/summary\u003e\n        \u003cdiv\u003e\n          \u003cp\u003eYes. Calcium carbonate (limestone) is 100% safe for grass and won't burn or damage turf. It's commonly used for marking sports fields and property lines.\u003c\/p\u003e\n        \u003c\/div\u003e\n      \u003c\/details\u003e\n\n      \u003cdetails class=\"nested-details\"\u003e\n        \u003csummary\u003eHow long does calcium carbonate last in storage?\u003c\/summary\u003e\n        \u003cdiv\u003e\n          \u003cp\u003eWhen stored in a sealed container in a cool, dry place, calcium carbonate has a shelf life of approximately 5 years. It's a stable mineral that won't degrade over time.\u003c\/p\u003e\n        \u003c\/div\u003e\n      \u003c\/details\u003e\n\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003c!-- 7. 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\u003eProcessed and packaged in California, USA\u003c\/li\u003e\n            \u003cli\u003eIndependently lab tested for purity and consistency\u003c\/li\u003e\n            \u003cli\u003e200 Mesh particle size verified for every batch\u003c\/li\u003e\n            \u003cli\u003ePure calcium carbonate — no fillers or additives\u003c\/li\u003e\n          \u003c\/ul\u003e\n        \u003c\/div\u003e\n      \u003c\/details\u003e\n\n      \u003cdetails class=\"nested-details\"\u003e\n        \u003csummary\u003eHassle-Free Return Policy\u003c\/summary\u003e\n        \u003cdiv\u003e\n          \u003cp\u003eWe stand behind the quality of our Calcium Carbonate. If you're not completely satisfied, we offer a 90-day money-back guarantee. Simply return the unused portion in its original packaging for a full refund.\u003c\/p\u003e\n        \u003c\/div\u003e\n      \u003c\/details\u003e\n\n      \u003cdetails class=\"nested-details\"\u003e\n        \u003csummary\u003eEnvironmental Responsibility\u003c\/summary\u003e\n        \u003cdiv\u003e\n          \u003cul class=\"feature-list\"\u003e\n            \u003cli\u003eNatural limestone mineral with minimal processing\u003c\/li\u003e\n            \u003cli\u003eTransitioning to compostable packaging\u003c\/li\u003e\n            \u003cli\u003eNon-toxic and environmentally safe\u003c\/li\u003e\n            \u003cli\u003eSustainable sourcing practices\u003c\/li\u003e\n          \u003c\/ul\u003e\n        \u003c\/div\u003e\n      \u003c\/details\u003e\n\n      \u003cdetails class=\"nested-details\"\u003e\n        \u003csummary\u003eCharitable Contributions\u003c\/summary\u003e\n        \u003cdiv\u003e\n          \u003cp\u003e1% of all profits go to our foundation, focused on improving educational opportunities for children. Learn more at \u003ca href=\"https:\/\/greenway.foundation\" target=\"_blank\" rel=\"noopener noreferrer\"\u003egreenway.foundation\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!-- 8. 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=\"#sds-url-pending\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eSafety Data Sheet (SDS)\u003c\/a\u003e\n\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003c!-- 9. 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=\"\/pages\/calcium-carbonate-faq\" target=\"_blank\" rel=\"noopener\"\u003eCalcium Carbonate FAQ — Complete answers to common questions about our chalk paint additive\u003c\/a\u003e\u003c\/li\u003e\n      \u003c\/ul\u003e\n    \u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003c!-- 10. HAVE QUESTIONS? (always last) --\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":"1 Pound","offer_id":1555296449,"sku":"701748874099","price":19.99,"currency_code":"USD","in_stock":true},{"title":"2 Pounds","offer_id":1555449793,"sku":"018227120180","price":21.99,"currency_code":"USD","in_stock":true},{"title":"3 Pounds","offer_id":1555449857,"sku":"018227120197","price":24.99,"currency_code":"USD","in_stock":true},{"title":"5 Pounds","offer_id":1555449985,"sku":"701748874105","price":31.99,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":1555450049,"sku":"018227120203","price":49.99,"currency_code":"USD","in_stock":true},{"title":"20 Pounds","offer_id":1555450177,"sku":"701748874112","price":59.99,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":1555450241,"sku":"018227120210","price":69.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0850\/0900\/products\/Calcium_Carbonate_Limestone_Chalk_Paint_Additive.JPG?v=1708406700"},{"product_id":"calcium-nitrate","title":"Calcium Nitrate Fertilizer 15.5-0-0 (Ammonia Calcium Nitrate 15.5-0-0)","description":"\u003cp\u003eCalcium Nitrate Fertilizer 15.5-0-0 is a 100% water-soluble source of 15.5% nitrogen and 19% calcium — two of the most in-demand plant nutrients delivered in a single dissolving step. The nitrogen is almost entirely fast-acting nitrate, plant-available the moment it dissolves, and the formula contains no phosphate or potash.\u003c\/p\u003e\n\u003cp\u003eNitrogen drives chlorophyll production, protein synthesis, and vegetative growth, while calcium supports cell-wall structure in fruit and leaf tissue that expands fastest. Nitrate is also the preferred nitrogen form for calcium-sensitive crops, since ammonium competes with calcium for uptake at the root. Calcium nitrate is widely used as a sidedress for tomatoes, peppers, and cucurbits, as a clean phosphate-free calcium and nitrate source for hydroponic and fertigation systems, and as a low-rate foliar supplement during rapid growth. It dissolves completely with no residue and has a near-neutral effect on soil pH.\u003c\/p\u003e\n\u003cp\u003eOne essential handling rule: calcium and concentrated phosphate or sulfate fertilizers should never be combined in the same stock tank, as they form an insoluble precipitate — keep calcium nitrate in a separate stock tank and combine only in the dilute solution. Water in dry applications, apply foliar sprays in cool conditions, and store sealed and dry, as the product is hygroscopic.\u003c\/p\u003e\n\u003cp\u003eCDFA registered and third-party lab tested for heavy metals, with results consistently well below required limits.\u003c\/p\u003e","brand":"Greenway Biotech, Inc.","offers":[{"title":"2 Pounds","offer_id":1556424641,"sku":"701748873726","price":24.99,"currency_code":"USD","in_stock":true},{"title":"5 Pounds","offer_id":1556424833,"sku":"701748874051","price":31.99,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":1556424897,"sku":"701748874075","price":49.99,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":1556425089,"sku":"701748874044","price":89.99,"currency_code":"USD","in_stock":true},{"title":"50 Pounds (or 2 x 25 pound bags)","offer_id":1556425153,"sku":"018227120951","price":149.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0850\/0900\/products\/Ammonium_Calcium_Nitrate_Fertilizer_15.5-0-0_Solution_Grade.JPG?v=1708406706"},{"product_id":"dolomite-lime","title":"Dolomite","description":"\u003cp\u003eDolomite Lime is a finely ground natural limestone soil amendment supplying 22.7% calcium and 11.8% magnesium — two nutrients in a single application — while gradually raising the pH of acidic soil. Unlike calcitic lime, which delivers calcium alone, dolomite is a double-carbonate mineral that supplies both calcium and magnesium in a roughly 2:1 ratio close to what most plants take up.\u003c\/p\u003e\n\u003cp\u003eCalcium supports cell-wall strength and root development; magnesium is the central atom of every chlorophyll molecule. Dolomite neutralizes soil acidity through a carbonate reaction, and because the magnesium fraction dissolves more slowly than calcium carbonate, it buffers pH gradually over months rather than producing a rapid spike — a more forgiving curve that is less likely to overshoot the target range. It suits vegetable gardens, lawns, fruit trees, flower beds, compost piles, and peat-based container mixes.\u003c\/p\u003e\n\u003cp\u003eDolomite works best applied several weeks before planting and worked into the soil; a soil test is the best way to set the correct rate. It is not appropriate for acid-loving plants such as blueberries, azaleas, rhododendrons, and potatoes, which prefer a lower soil pH. It is sold as an agricultural soil amendment, not as an animal feed or livestock supplement. Minimize dust when handling, wear eye protection, and store sealed and dry.\u003c\/p\u003e\n\u003cp\u003eCDFA registered, made in the USA, and third-party lab tested for heavy metals, with results consistently well below required limits.\u003c\/p\u003e","brand":"Greenway Biotech, Inc.","offers":[{"title":"1 Pound","offer_id":41067942547,"sku":"018227120234","price":19.99,"currency_code":"USD","in_stock":true},{"title":"2 Pounds","offer_id":14248129031,"sku":"018227120241","price":21.99,"currency_code":"USD","in_stock":true},{"title":"3 Pounds","offer_id":41068037651,"sku":"018227120258","price":24.99,"currency_code":"USD","in_stock":true},{"title":"5 Pounds","offer_id":1556587201,"sku":"701748873627","price":31.99,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":1556587265,"sku":"701748873658","price":43.99,"currency_code":"USD","in_stock":true},{"title":"20 Pounds","offer_id":1556587393,"sku":"701748873665","price":54.99,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":1556587457,"sku":"018227120265","price":61.99,"currency_code":"USD","in_stock":true},{"title":"50 Pounds (or 2 x 25 pound bags)","offer_id":1556587521,"sku":"018227120272","price":124.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0850\/0900\/products\/Dolomite_Lime_Organic.JPG?v=1711585594"},{"product_id":"epsom-salt","title":"Epsom Salt USP Grade (Magnesium Sulfate) — Bath, Foot Soak \u0026 Garden","description":"\u003cp\u003eGreenway Biotech Epsom Salt is pure USP-Grade magnesium sulfate heptahydrate (MgSO\u003csub\u003e4\u003c\/sub\u003e·7H\u003csub\u003e2\u003c\/sub\u003eO) - the same pharmaceutical-purity specification used for pharmaceutical excipients. Fine-grain crystals dissolve quickly in warm water with no stirring or gritty residue, making it well suited to relaxing bath soaks, foot soaks, and DIY body scrubs.\u003c\/p\u003e\n\n\u003cp\u003eBeyond the bathtub, the same bag works in the garden as a fast-acting source of magnesium and sulfur for plants showing confirmed magnesium deficiency - tomatoes, peppers, roses, citrus, and leafy greens are the most common responders. Available in 2 lb, 5 lb, 10 lb, and 25 lb resealable bags.\u003c\/p\u003e\n\n\u003cp\u003eSourced within the United States and packaged at our family-owned Madera, California facility - registered with the FDA. Third-party lab tested and screened for heavy metals; results consistently well below required limits. 100% magnesium sulfate with no added fragrance, dye, filler, or preservative. External use only. Backed by a 90-day money-back guarantee.\u003c\/p\u003e","brand":"Greenway Biotech, Inc.","offers":[{"title":"1 Pound","offer_id":1556659521,"sku":"0701748873580","price":17.99,"currency_code":"USD","in_stock":true},{"title":"3 Pounds","offer_id":1556659649,"sku":"0701748873894","price":21.99,"currency_code":"USD","in_stock":true},{"title":"5 Pounds","offer_id":1556659777,"sku":"0701748874013","price":24.99,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":1556659841,"sku":"0701748873801","price":33.99,"currency_code":"USD","in_stock":true},{"title":"20 Pounds","offer_id":1556659969,"sku":"0726670283368","price":41.99,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":1556660033,"sku":"0726670283344","price":51.99,"currency_code":"USD","in_stock":true},{"title":"2 X 25 Pounds","offer_id":30755152232483,"sku":"726670283337","price":89.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0850\/0900\/files\/Organic_Epsom_Salt_-_Magnesium_Sulfate_USP_grade_25_Pounds.png?v=1781065239"},{"product_id":"sulfate-of-potash-magnesia","title":"Sulfate of Potash Magnesia 0-0-22","description":"\u003cp\u003eK-Mag Fertilizer 0-0-22 (sulfate of potash magnesia, also called langbeinite) is a naturally mined mineral fertilizer that delivers three nutrients in a single soil-applied product: 22% soluble potash (K₂O), 11% magnesium, and 22% sulfur, with less than 2.5% chloride and no nitrogen.\u003c\/p\u003e\n\u003cp\u003ePotassium supports fruit size, sugar movement, and stress tolerance; magnesium is the central atom of every chlorophyll molecule; and sulfur is required for protein synthesis and enzyme function. The low chloride content makes K-Mag well suited to chloride-sensitive crops such as potatoes, tomatoes, peppers, berries, and tobacco, and the absence of nitrogen makes it useful for late-season feeding during fruit development. Because langbeinite is less soluble than refined potassium salts, it dissolves gradually as soil moisture moves through the root zone, providing nutrient availability over weeks.\u003c\/p\u003e\n\u003cp\u003eK-Mag is a soil-applied fertilizer for vegetables, fruit trees, berries, field crops, and pastures — broadcast, top-dress, or side-dress, then water in. It is not fully water-soluble and is not intended for foliar spraying or recirculating hydroponic systems. Keep the product away from direct stem and trunk contact, and store sealed and dry.\u003c\/p\u003e\n\u003cp\u003eCDFA registered and third-party lab tested for heavy metals, with results consistently well below required limits.\u003c\/p\u003e","brand":"Greenway Biotech, Inc.","offers":[{"title":"1 Pound","offer_id":1558061825,"sku":"018227120623","price":17.99,"currency_code":"USD","in_stock":true},{"title":"2 Pounds","offer_id":1558061889,"sku":"018227120630","price":20.99,"currency_code":"USD","in_stock":true},{"title":"3 Pounds","offer_id":1558061953,"sku":"018227120647","price":23.99,"currency_code":"USD","in_stock":true},{"title":"5 Pounds","offer_id":1558062081,"sku":"701748874020","price":31.99,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":1558062145,"sku":"701748874440","price":42.99,"currency_code":"USD","in_stock":true},{"title":"20 Pounds","offer_id":1558062273,"sku":"701748873740","price":49.99,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":1558062337,"sku":"018227120654","price":61.99,"currency_code":"USD","in_stock":true},{"title":"50 Pounds (or 2 x 25 pound bags)","offer_id":1558062401,"sku":"018227120661","price":129.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0850\/0900\/products\/s-l500.jpg?v=1711585927"},{"product_id":"cal-mag-plus-2-0-0-concentrate","title":"Cal-Mag Plus 2-0-0 Concentrate","description":"\u003cp\u003eCal-Mag Plus 2-0-0 is a 100% water-soluble calcium, magnesium, and iron supplement built for hydroponics, coco coir, and reverse-osmosis water — the three growing conditions where calcium and magnesium deficiency is most likely. It supplies 3.2% calcium, 1.2% magnesium, 0.1% EDTA-chelated iron, and 2% nitrogen from nitrate sources.\u003c\/p\u003e\n\u003cp\u003eCalcium supports cell-wall integrity, magnesium sits at the center of every chlorophyll molecule, and the EDTA-chelated iron stays plant-available across the working pH range of hydroponic systems. Because RO and distilled water carry no minerals, and because coco coir naturally binds calcium and magnesium, base fertilizers alone often leave these nutrients short. Cal-Mag Plus fills that gap and is the first component poured in Greenway's 4-part hydroponic feeding program.\u003c\/p\u003e\n\u003cp\u003eDissolve into a reusable stock concentrate, add it to the reservoir first — before any other nutrient — to help prevent precipitation, then set pH last. Never combine concentrated Cal-Mag directly with concentrated sulfate or phosphate fertilizers; use separate stock tanks and dilute each independently. Adjust the dose to your water hardness, and for coco coir, feed at every watering. Store sealed and dry.\u003c\/p\u003e\n\u003cp\u003eCDFA registered and third-party lab tested for heavy metals, with results consistently well below required limits.\u003c\/p\u003e","brand":"Greenway Biotech, Inc.","offers":[{"title":"2.5 Pounds (Makes 1 Gallon)","offer_id":1841274369,"sku":"0701748874266","price":33.99,"currency_code":"USD","in_stock":true},{"title":"5 Pounds (Makes 2 Gallons)","offer_id":1841274433,"sku":"0701748874273","price":55.99,"currency_code":"USD","in_stock":true},{"title":"10 Pounds (Makes 4 Gallons)","offer_id":1841274497,"sku":"018227121439","price":97.99,"currency_code":"USD","in_stock":true},{"title":"25 Pounds (Makes 10 Gallons)","offer_id":1841274561,"sku":"018227121446","price":209.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0850\/0900\/products\/CalMag.JPG?v=1708406691"},{"product_id":"gypsum","title":"Gypsum","description":"\u003cp\u003eGypsum (Calcium Sulfate) is a premium mined agricultural soil amendment that supplies 22.5% calcium and 18% sulfur from natural calcium sulfate dihydrate (CaSO₄·2H₂O) at 97% purity. Unlike lime, gypsum delivers calcium without raising soil pH, making it the right choice for soils where pH is already adequate or alkaline.\u003c\/p\u003e\n\u003cp\u003eGypsum works through three independent mechanisms: it supplies plant-available calcium for cell walls and root structure, it helps loosen heavy clay soils by flocculating clay particles into larger aggregates for better drainage and air movement, and it displaces sodium in sodic soils where drainage allows the sodium to leach away. It also provides sulfur for protein and chlorophyll synthesis. This makes it well suited to clay-soil lawns and gardens, calcium-sensitive crops such as tomatoes, peppers, brassicas, and peanuts, orchards, and sodic-soil reclamation.\u003c\/p\u003e\n\u003cp\u003eBroadcast with a spreader and water in, or incorporate into the top several inches for the fastest structural response. Gypsum carries no burn risk at recommended rates and can be applied year-round. 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It supplies seven trace elements — iron, zinc, manganese, copper, boron, molybdenum, and calcium — in a single powder, replacing the need for multiple separate micronutrient supplements.\u003c\/p\u003e\n\u003cp\u003eIron, zinc, manganese, and copper are EDTA-chelated, which keeps these metals dissolved and available across the typical 5.5–6.5 reservoir pH range where unchelated forms tend to precipitate and become unavailable to roots. Boron and molybdenum are supplied in mineral form, which is naturally stable across that range. Micronutrient demand stays relatively constant through the growth cycle, so Micro Green is dosed at a steady rate from early growth through flowering, making it a straightforward addition to a recirculating reservoir, drip system, or coco feed.\u003c\/p\u003e\n\u003cp\u003eMix into a stock solution and store it in a dark container, since light can degrade the chelates over time. 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The nitrogen is supplied entirely as nitrate, so it is immediately plant-available with no microbial conversion step and stays available even in cool soils.\u003c\/p\u003e\n\u003cp\u003eMagnesium is the central atom of every chlorophyll molecule and activates key plant enzymes; deficiency typically shows as interveinal yellowing on older, lower leaves. This product corrects both nitrogen and magnesium needs at once in a pH-neutral carrier that will not acidify the root zone. It dissolves completely with no residue, making it well suited to hydroponic Tank A programs, fertigation, soil drench, and foliar correction, and it is compatible with calcium nitrate in concentrated stock.\u003c\/p\u003e\n\u003cp\u003eAdd the fertilizer to water and stir until clear; apply foliar sprays in early morning or late afternoon, and keep foliar rates well below soil rates. Keep separate from concentrated phosphate stock tanks.\u003c\/p\u003e\n\u003cp\u003eIndependently lab tested for heavy metals, with results consistently well below required limits.\u003c\/p\u003e","brand":"Greenway Biotech, Inc.","offers":[{"title":"2 Pounds","offer_id":44983764307,"sku":"018227121149","price":26.99,"currency_code":"USD","in_stock":true},{"title":"5 Pounds","offer_id":44983764371,"sku":"018227121156","price":39.99,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":44983764435,"sku":"018227121163","price":59.99,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":44983764499,"sku":"018227121170","price":89.99,"currency_code":"USD","in_stock":true},{"title":"50 Pounds (or 2X 25 Pound bags)","offer_id":44983764563,"sku":"018227121187","price":179.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0850\/0900\/products\/Magnesium_Nitrate_11-0-0.JPG?v=1711585777"},{"product_id":"fish-bone-meal-4-17-0","title":"Fish Bone Meal Fertilizer 4-17-0","description":"\u003cp\u003eOrganic Fish Bone Meal 4-17-0 is a CDFA-registered organic phosphate fertilizer derived from fish tankage. 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It is not water-soluble, so it is not suited to hydroponic systems or foliar spraying.\u003c\/p\u003e\n\u003cp\u003eIndependently lab tested for heavy metals, with results consistently well below required limits. 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