Top 10 CalMag Supplement for Plants – Industrial & Scientific

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1. Blue Planet Nutrients


CalMag + Iron Liquid Plant Supplement Quart 32 oz Blue Planet Nutrients | Calcium Magnesium Iron for All Plants & Gardens | Prevents & Corrects Blossom End Rot | Vegetables Fruits Flowers Herbs

Blue Planet Nutrients #ad - High-grade, concentrated formula. Blue planet nutrients uses only the highest quality ingredients in our hand-crafted nutrient formulas.

Calmag with iron supplement is used for plants that require elevated levels of calcium and magnesium to reach their fullest potential and is excellent at preventing and correcting blossom end rot. Designed for use in all hydroponic systems, aeroponics, coco-coir, all soil-less mediums such as vermiculite, perlite, and in soil. This product helps strengthen cell walls resulting in stronger plant structures and greater overall health. Proven results across the internet! See why everyone is raving about Blue Planet Nutrients! .
BrandBlue Planet Nutrients #ad
ManufacturerBlue Planet Nutrients #ad
Height7.5 Inches
Length5.25 Inches
Width2.4 Inches
Part Number4336441504

2. General Hydroponics


General Hydroponics CALiMAGic 1-0-0, Soluble, Concentrated Blend of Calcium & Magnesium, Secondary Nutrient Deficiencies Helps Prevent Blossom End Rot & Tip Burn, Clean, 1-Quart

General Hydroponics #ad - Helps prevent blossom end rot and tip burn in tomatoes, lettuce, and other calcium intensive plants. Prevents secondary nutrient deficiencies in fast growing plants. Will not clog spray lines or drip emitters and can be used in reservoirs combined with many other fertilizers. Contains an npK of 1-0-0 Calimagic 1-0-0 is a concentrated blend of readily available calcium and magnesium.
BrandGeneral Hydroponics #ad
ManufacturerGeneral Hydroponics #ad
Height3.2 Inches
Length3.3 Inches
Weight2.9 Pounds
Width8.6 Inches
Part NumberHGC733525

3. Bloom City


Bloom City Professional Grade Ultra Pure Cal-Mag Growing Fertilizer, Quart 32 oz

Bloom City #ad - Contains no harmful edta: unlike other brands, bloom city uses organic chelates and never uses chemicals like EDTA, Healthier for your garden and healtier for the planet. Apply with every watering for the full benefit.

Compatible with any nutrient system: 100% compatible with other nutrient systems, and can help make other minerals more bio-available. Bioactivated formula for optimal nutrient uptake: Calcium and magnesium, Micro-chelated with fulvic acid; if you google it you’ll see why that’s good. We choose only the highest quality ingredient sources and manufacturing methods to create the world’s best craft growing nutrient systems. Prevents common growth deficiencies: Apply Cal-Mag in every stage of growth for strong stalk and leaf health. Contains more micronutrients than any other brand: Iron Fe, Manganese Mn, Boron B, Molybdenum Mo, Copper Cu, Zinc Zn, Sulfur S.
BrandBloom City #ad
ManufacturerBloom City #ad
Part Numbercalmag-32



1 Quart 32 oz, Plus Iron and Micronutrients by TPS Nutrients, Organic Cal-Mag OAC Plant Nutrient and Supplement

TPS NUTRIENTS #ad - Formulated and made in the usa: designed by sustainability conscious plant scientists and craft growing enthusiasts in Seattle, WA. Use at 1-2mL per gallon. Tps chooses only the highest quality ingredient sources and manufacturing methods to create the world’s best nutrient systems.

Prevents common growth deficiences: Apply CalMag in every stage of growth for strong stalk and leaf health. Compatible with other nutrients: 100% Compatible with other nutrient systems, and can actually help make other minerals more Bio-Available. Organic calmag for all plants: Organic Calcium, magnesium, and micronutrients micro-chelated with Organic Acids for bio-availability. Highest quality, most potent, better for you, best value, biggest yield: tps’s ingredients are better for plants, and better for the planet. Simply the best choice for the conscientious grower.
ManufacturerTPS Nutrients #ad
Height9 Inches
Length3 Inches
Weight2.25 Pounds
Width3 Inches

5. Humboldts Secret


Humboldts Secret Calcium, Magnesium and Iron Supplement – Hydroponic Supplies – Liquid Nutrient Fertilizer – Supports Vegetative and Flowering Stage – 1 Quart

Humboldts Secret #ad - Source of calcium magnesium & chelated iron: Many varieties of flowering plants require higher levels of these micronutrients. Suitable for hydroponics, soil, and container gardens: Nutrient systems and supplements are commonly used as hydroponic supplies and are a good solution for soil and container gardens, ensuring strong and healthy plants and yields.

Corrects common plant deficiencies: sometimes an unhealthy plant may be suffering from a nutrient deficiency or even too much of one nutrient. Our calmag & iron supplement effectively corrects and remedies these micronutrient plant deficiencies. Our well-balanced formula is designed to specifically address any plant deficiencies that may be present.

Nutrient uptake and absorption: this formulae efficiently supports nutrient uptake and absorption by addressing any plant deficiencies in the first place, thus successfully supporting the vegetative and flowering stage of your plants. Optimal for coco coir medium and reverse osmosis water: Our supplemental CalMag & Iron by Humboldts Secret is highly recommended for plants growing in coco substrate or reverse osmosis water, as the absorption process becomes magnified.
BrandHumboldts Secret #ad
ManufacturerHumboldts Secret #ad

6. Hydrohort


Cal-N-Mag Plant Supplement by HydroHort | Our Cal-N-Mag Supplement is a Calcium Fertilizer and Magnesium Fertilier | Stop Blossom End Rot with Cal Mag for Plants | 1 QT

Hydrohort #ad - Prevents common growth deficiencies: Apply Cal-Mag at every stage of growth for strong plants. Excellent source for Plant Calcium used against Rot Stop for Tomatoes. Hydrohort's cal-n-mag Plus is the preferred Nutrients for Tomato Plants. Hydrohort's cal-n-mag supplement 2-0-0 is an Excellent Source of Calcium and Magnesiumfor Plants. It is the tomato secret fertilizer. Our cal mag supplement is The Nutrient for Plants.
BrandHydrohort #ad
ManufacturerHydroHort #ad
Height8 Inches
Length5 Inches
Width2 Inches

7. Botanicare


Magnesium, And Iron Plant Supplement, 5 Gallon, A Calcium, 2-0-0 NPK, Botanicare HGC732125 Cal-Mag Plus, Corrects Common Plant Deficiencies, Add To Water Or Use As A Spray

Botanicare #ad - Supplement your existing nutrient program with Cal-Mag Plus. Contains formulation of 2-0-0 NPK. To use: mix well and use with every watering, as needed, for enhanced growth apply as a foliar spray. For use in containers, coco, hydrogardens, and when growing in soil. Highly fortified calcium, magnesium, and iron plant supplement formulated to correct common deficiencies.
BrandBotanicare #ad
ManufacturerSunlight Supply Inc. #ad
Height13.8 Inches
Length10.4 Inches
Weight9.5 Pounds
Width11 Inches
Part NumberBCCM5



Cal-Mag Complete, 1 Gallon 128 oz, Calcium Magnesium Iron and Micronutrients Fertilizer and Supplement by TPS Nutrients

TPS NUTRIENTS #ad - Complete array of calcium magnesium and micronutrients: TPS Nutrients CalMag Complete contains every necessary micronutrient for a successful harvest, from veg to bloom. Check the label on other brands to make sure you avoid this particle.

Designed to be sustainable: every ingredient and every process was designed to keep sustainability in mind. Energy dense fertilizer for all plants: CalMag Complete is great on all plants, it shines on fast growing plants and is a cure for blossom end rot and other common deficiences. Compatible with other fertilizers: tps CalMag Complete is fully compatible in solution with other TPS products, it is also compatible with supplements from other fertilizer brands.

Also contains vital organic acid complexes. Tps nutrients chooses only the best and most renewable materials to build these products. Contains no harmful edta: tps never uses harmful EDTA in any of its formulations, unlike other major brands.
ManufacturerTPS Nutrients #ad
Height12 Inches
Length6 Inches
Weight9.5 Pounds
Width6 Inches
Part NumberTRUECMC1G

9. GS Plant Foods


Magnesium, GS Plant Foods Cal-Mag Extreme Liquid 1 Gallon Fertilizer with Calcium, N-P-K of 2-0-0, Corrects Secondary Nutrient & Trace Element Deficiencies, Iron and Sulfur Supplement

GS Plant Foods #ad - Easy-to use just mix with water. Formulated for use in all soil, container, coco and hydro growing. Gs plant foods’ cal-mag extreme solves the problem. It contains calcium, iron, magnesium, sulfur, Manganese, Zinc, Boron & Molybdenum all in an immediately plant available form with natural chelates for fast plant absorption.

We all know plants need adequate primary nutrients nitrogen, they also need the right amount of both secondary nutrients and trace elements or micro-nutrients. Even with the right amount of n-p-k, phosphorous and potassium however, a small deficiency in either secondary or micro-nutrients can severely limit plant health, growth and yield. Beneficial to plants throughout all growth cycles and easily mixes with water to use during irrigation or as a foliar spray.
BrandGS Plant Foods #ad
Part NumberCMextGal

10. Botanicare


Add To Water Or Use As A Spray, 2-0-0 NPK, 2.5 Gallon, Botanicare HGC732120 Cal-Mag Plus, And Iron Plant Supplement, Magnesium, A Calcium, Corrects Common Plant Deficiencies

Botanicare #ad - Helps with calcium, magnesium and iron deficiencies in nutrient fertilizer programs. Highly beneficial calcium, magnesium, iron and trace mineral plant nutrient supplement. Container's measure 9-inch length by 7-inch width by 14-inch height. Cal mag plus 2-0-0 is custom designed. This product available in 2. 5-gallon.
BrandBotanicare #ad
ManufacturerSunlight Supply Inc. #ad
Height13.9 Inches
Length9.1 Inches
Weight5.3 Pounds
Width6.9 Inches
Part NumberHGC732120