{"product_id":"gs-plant-foods-cal-mag-420-dry-super-concentrate-420-gallons-of-nutrient-solution","title":"GS Plant Foods Cal-Mag 420 Dry Super Concentrate – 420 Gallons of Nutrient Solution","description":"\u003cp\u003eGS Plant Foods Cal-Mag 420 Dry Super Concentrate offers a versatile calcium and magnesium nutrition option built for gardeners seeking reliable, scalable feeding. This completely water soluble powder dissolves readily into irrigation water or can be used as a foliar spray, providing flexibility for soil, coco, container, and hydro systems. The result is a ready-to-use solution that supports steady calcium and magnesium delivery across development stages, helping plants maintain strong cell walls and overall vitality without guesswork.\u003c\/p\u003e\u003cp\u003eWith a focus on ease and reliability, Cal-Mag 420 is designed to slot into a wide range of feeding routines. The powder dissolves quickly in water, forming a uniform solution that helps minimize variation between batches. This makes it simple for growers to maintain steady calcium and magnesium availability across diverse crops, from leafy greens to fruiting plants. The product is formulated to be compatible with a variety of growing media, reducing the need for multiple supplements in many programs.\u003c\/p\u003e\u003ch3\u003eWhat sets Cal-Mag 420 apart\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMakes up to 420 gallons of nutrient solution per container, delivering exceptional value for larger grows.\u003c\/li\u003e\n\u003cli\u003eContains secondary nutrients in balanced amounts: Calcium 13%, Magnesium 3%, Sulfur 4%, and Nitrate Nitrogen 11%.\u003c\/li\u003e\n\u003cli\u003eFully water soluble, enabling quick mixing and consistent distribution through irrigation lines or spray bottles.\u003c\/li\u003e\n\u003cli\u003eSuitable for all growth cycles and compatible with soil, coco, container, and hydroponic setups.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eHow to use\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMeasure with the included scoop and add to water to create your nutrient solution.\u003c\/li\u003e\n\u003cli\u003eMix thoroughly until the powder is fully dissolved, then apply via irrigation or foliar spray as needed.\u003c\/li\u003e\n\u003cli\u003eUse across growth stages, adjusting frequency based on plant response and environmental conditions.\u003c\/li\u003e\n\u003cli\u003eStore sealed in a cool, dry place to preserve solubility and potency.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003ePractical considerations\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eDesigned to support a balanced calcium-magnesium supply, which can help with structural integrity and nutrient uptake in a variety of crops.\u003c\/li\u003e\n\u003cli\u003eCoexists with widely used growing media, reducing the need for multiple supplements in many programs.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eProduct specifics\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eSize: 18 ounces\u003c\/li\u003e\n\u003cli\u003eYield: up to 420 gallons of nutrient solution per container\u003c\/li\u003e\n\u003cli\u003eComposition: Total Nitrogen 11.0%, Nitrate N 11.0%, Calcium 13.0%, Sulfur 4.0%, Magnesium 3.0%\u003c\/li\u003e\n\u003cli\u003eSolubility: 100% water soluble powder\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What is GS Plant Foods Cal-Mag 420 Dry Super Concentrate used for?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: A dry, water-soluble Cal-Mag fertilizer that supplies calcium, magnesium, and secondary nutrients across growth stages.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How much nutrient solution does one 18-ounce container produce?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It yields up to 420 gallons of nutrient solution when mixed according to directions.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"GS Plant Foods","offers":[{"title":"Default Title","offer_id":45743586705594,"sku":"B09M7KNTZ6","price":71.24,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/3536\/8890\/files\/gs-plant-foods-cal-mag-420-dry-bottle.jpg?v=1774923778","url":"https:\/\/gardencanada.ca\/products\/gs-plant-foods-cal-mag-420-dry-super-concentrate-420-gallons-of-nutrient-solution","provider":"Garden Canada","version":"1.0","type":"link"}