{"product_id":"cal-mag-growing-fertilizer-gallon-prevents-blossom-end-rot","title":"Cal-Mag Growing Fertilizer Gallon - Prevents Blossom End Rot","description":"\u003cp\u003eIn this review of the Cal-Mag Growing Fertilizer Gallon, the bottom line is simple: this fluid supplement is best for growers who need a reliable, bioavailable source of calcium and magnesium that also supplies a broader range of micronutrients. The product stands out because it pairs those primary elements with micro-chelation by fulvic acid, which reviewers and users say improves uptake and helps prevent common issues like blossom end rot and leaf yellowing. It is a practical choice for gardeners who want a single, easy-to-use additive that works across media and feeding systems.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBalanced Ca-Mg blend:\u003c\/strong\u003e Supplies calcium and magnesium to support strong stalk development and reduce blossom end rot in fruiting crops.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBroad micronutrient profile:\u003c\/strong\u003e Includes Iron, Zinc, Boron, Copper, Manganese, Molybdenum, and Sulfur for overall plant vitality and to address subtle deficiencies.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBioactivated with fulvic acid:\u003c\/strong\u003e Micro-chelated formulation enhances nutrient absorption at the root, improving efficiency of each dose.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy dosing options:\u003c\/strong\u003e Works as a feedwater additive or foliar spray with clear rates for grow and bloom phases to fit most feeding programs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUniversal medium compatibility:\u003c\/strong\u003e Safe for soil, coco, peat, and hydroponic systems so it can follow plants through the entire cycle.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis product is aimed at hobby and serious gardeners who grow fruiting vegetables like tomatoes, peppers, and other nutrient-sensitive crops, and who want to prevent blossom end rot and yellowing leaves. It is also well suited for hydroponic growers who praised its performance in water-based systems and value a concentrated supplement that mixes readily into feedwater.\u003c\/p\u003e\n\u003cp\u003eGrowers who prefer single-element supplements or need an ultra-minimalist program may look elsewhere, and if a user requires a product certified for organic labeling they should confirm compatibility, since the formula is a bioactivated, micro-chelated nutrient blend rather than a straight organic amendment.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eProvides a balanced dose of calcium and magnesium that supports stalk strength and leaf health.\u003c\/li\u003e\n\u003cli\u003eContains a wider array of micronutrients than many Cal-Mag products, helping overall plant vigor.\u003c\/li\u003e\n\u003cli\u003eFulvic acid chelation improves uptake, which customers report as noticeable in growth and rot prevention.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLabel dosing requires care across grow and bloom phases, so beginners should follow instructions closely to avoid overuse.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct type\u003c\/td\u003e\n\u003ctd\u003eCal-Mag growing fertilizer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolume\u003c\/td\u003e\n\u003ctd\u003e1 gallon (128 oz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKey nutrients\u003c\/td\u003e\n\u003ctd\u003eCalcium, Magnesium, plus Fe, Zn, B, Cu, Mn, Mo, S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBioactivation\u003c\/td\u003e\n\u003ctd\u003eMicro-chelated with fulvic acid\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUsage methods\u003c\/td\u003e\n\u003ctd\u003eFeedwater additive and foliar spray\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDosing (feedwater)\u003c\/td\u003e\n\u003ctd\u003e24 mL\/gal grow, 35 mL\/gal bloom\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDosing (foliar)\u003c\/td\u003e\n\u003ctd\u003e10-20 mL\/gal up to 12 times weekly\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe Cal-Mag Growing Fertilizer Gallon is a practical, value-minded supplement for growers who need reliable calcium and magnesium with added micronutrients and improved uptake. It works across soil, coco, and hydroponic systems and is especially useful for preventing blossom end rot in fruiting crops, making it a good buy for gardeners who want performance without a complicated regimen.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCan this be used in hydroponic systems?\u003c\/strong\u003e\u003cbr\u003eYes, the formula is compatible with hydroponics and reviewers specifically noted good results with hydroponic tomatoes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat are the feedwater dosing rates?\u003c\/strong\u003e\u003cbr\u003eUse 24 mL per gallon during the grow phase and 35 mL per gallon during the bloom phase as stated on the label.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs foliar spraying an option?\u003c\/strong\u003e\u003cbr\u003eYes, it can be used as a foliar spray at 10-20 mL per gallon, up to 12 times weekly, for quicker nutrient uptake.\u003c\/p\u003e","brand":"Bloom City","offers":[{"title":"Default Title","offer_id":48200338309339,"sku":"B073ZP47ZN","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/61BOCBiCtuL._SL1500.jpg?v=1770222937","url":"https:\/\/gearmusthave.com\/products\/cal-mag-growing-fertilizer-gallon-prevents-blossom-end-rot","provider":"GearMustHave","version":"1.0","type":"link"}