Top 10 CalMag for Plants – Home & Kitchen Features

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1. Bloom City


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

Bloom City #ad - Apply with every watering for the full benefit. Prevents common growth deficiencies: Apply Cal-Mag in every stage of growth for strong stalk and leaf health. We choose only the highest quality ingredient sources and manufacturing methods to create the world’s best craft growing nutrient systems.

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. Contains more micronutrients than any other brand: Iron Fe, Zinc Zn, Manganese Mn, Boron B, Copper Cu, Molybdenum Mo, Sulfur S. 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. Compatible with any nutrient system: 100% compatible with other nutrient systems, and can help make other minerals more bio-available.
BrandBloom City #ad
ManufacturerBloom City #ad
Part Numbercalmag-32

2. Blue Planet Nutrients


Blue Planet Nutrients CalMag with Iron Liquid Supplement Quart 32 oz | Cal Mag for All Plants & Gardens | Grow Vegetables Herbs Fruits Flowers Buds | Prevents & Corrects Blossom End Rot

Blue Planet Nutrients #ad - Designed for use in all hydroponic systems, coco-coir, all soil-less mediums such as vermiculite, perlite, aeroponics, and in soil. Proven results across the internet! See why everyone is raving about Blue Planet Nutrients! 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.

This product helps strengthen cell walls resulting in stronger plant structures and greater overall health. High-grade, concentrated formula. Blue planet nutrients uses only the highest quality ingredients in our hand-crafted nutrient formulas.
BrandBlue Planet Nutrients #ad
ManufacturerBlue Planet Nutrients #ad
Height7.5 Inches
Length5.25 Inches
Width2.4 Inches
Part Number4336441504

3. Humboldts Secret


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

Humboldts Secret #ad - Increase nutrient uptake and absorption: This formula efficiently increases nutrient uptake and absorption by addressing any plant deficiencies in the first place, thus successfully supporting the vegetative and flowering stage of your plants.

Rich source of calcium magnesium & chelated iron: Many varieties of flowering plants require higher levels of these micronutrients. Our well-balanced formula is designed to specifically address any plant deficiencies that may be present. Suitable for hydroponics, and container gardens: Nutrient systems and supplements are commonly used as hydroponic supplies and are a good solution for soil and container gardens, soil, ensuring strong and healthy plants and yields. Our cal/mag & iron supplement effectively corrects and remedies these micronutrient plant deficiencies.

Optimal for coco coir medium and reverse osmosis water: Our Supplemental Cal/Mag & Iron by Humboldts Secret is highly recommended for plants growing in coco substrate or reverse osmosis water, as the absorption process becomes magnified. Corrects common plant deficiencies: sometimes, an unhealthy plant may be suffering from a nutrient deficiency or even too much of one nutrient.
BrandHumboldts Secret #ad
ManufacturerHumboldts Secret #ad

4. TPS Nutrients


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

TPS Nutrients #ad - Simply the best choice for the conscientious grower. Compatible with other nutrients: 100% Compatible with other nutrient systems, and can actually help make other minerals more Bio-Available.

Highest quality, most potent, biggest yield: tps’s ingredients are better for plants, better for you, BEST VALUE, and better for the planet. Chelated with 100% organic fulvic acid: Organic Calcium and magnesium, micro-chelated with Organic Acids for bio-availability. 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.
BrandTPS Nutrients #ad
ManufacturerTPS Nutrients #ad
Height9 Inches
Length3 Inches
Weight2.25 Pounds
Width3 Inches



ENVY CalMag+ Fe Gallon 4-0-0 Professional Grade Calcium, Magnesium and Iron Liquid Plant Supplement | Superior Calcium Source No Calcium Chloride

ENVY #ad - Perfect for r. O. While it performs well, essential nutrients become locked up in its fibers. Better together - our calmag+ fe performs excellently with all hydroponic, soil and coir nutrient lines as a supplementary Calcium, Magnesium and Iron source - however; it performs best when combined with ENVY's A & B base nutrients and Bloom Trigger concentrate.

Superior cal-mag - envy's calmag+ is derived from a superior source of Ca, Calcium Nitrate. Most calmag blends you will find are created by blending Calcium Chloride, which is less friendly for plants and hydro systems. Corrects coir nutrient lock up - coco-coir is a popular growing media for hobbyist and professional gardeners alike. While R. O. Water offers consumers unparalleled purity, it strips minerals necessary for plant growth - ENVY's CalMag+ Fe replenishes water stripped of minerals.

Formulated to replace minerals depleted by reverse osmosis water applications. Prevents blossom end rot - our calmag+ fe provides tomatoes, Peppers and other hydroponically grown crops an ample concentration of highly-absorbable Calcium, preventing Calcium Deficiency which causes leaf yellowing & blossom end rot in Tomatoes and Peppers. Our concentrated CalMag+ replenishes nutrients lost to lock-up.
BrandENVY #ad
ManufacturerNational Liquid Fertilizer #ad



16oz, Cal Mag Liquid Plant Food, Indoor Plants Hydroponic Advanced Nutrients, Calmag Plant Supplement for Soil and Hydroponic Systems -Calcium Magnesium Macronutrients for Hydroponic Garden

MIDASHYDRO PRODUCTS #ad - Midas products brings you a liquid, easy to measure cal mag plant supplement to ensure easy, timely application. You won’t find a better product on the market! Sourced from the highest quality ingredients, Midas is a name you can trust! Not just for hydroponics.

Apply at all stages of growth! our nutrients are safe and necessary for all stages of growth. These make up some of the most important macronutrients crucial for plant growth. Erase vitamin deficiencies in hydroponic systems and soil grows with Midas Products cal mag liquid plant nutrients. The biggest challenge with hydroponic systems is making sure your plants are getting proper nutrients.

Our cal mag plant supplement is essential to any grow kit! Calcium supplement, magnesium supplement and nitrogen supplement are essential hydroponic nutrients and soil grown plant food. Our cal mag is easy to apply to any grow system, soil, aeroponics, aquaponics and hydroponics are all a great match!. Enjoy greener, healthier plants.
ManufacturerMidas Products #ad

7. Botanicare


Magnesium, and Iron Supplement, A Calcium, 2-0-0 NPK, Botanicare BCCM2.5 Cal-Mag Plus, Corrects Common Plant Deficiencies Add to Water Or Use As A Spray, 2.5 Gallon

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

8. General Hydroponics


Natural, 1 Quart fertilizers, General Hydroponics GH5312 General Organics CaMg+ Hydroponic Plant Supplement

General Hydroponics #ad - Resulting in enhanced growth and healthier flowers and fruits. Available in 1-quart. Low molecular weight acids may facilitate calcium and magnesium transport into the plant. It is a blend of fermented calcium and magnesium complexed with organic acids and sugar chelates. Camg+ helps optimize plant nutrition.
BrandGeneral Hydroponics #ad
ManufacturerGeneral Hydroponics #ad
Height3.25 Inches
Length8.5 Inches
Weight1.2 Pounds
Width3.25 Inches
Part NumberGL56726820

9. Blue Planet Nutrients


Blue Planet Nutrients CalMag Pro Formula 16 oz | Soluble Calcium Magnesium & Micro-Nutrients Supplement | Corrects & Prevents Nutrient Deficiencies in Plants | for All Plants & Gardens

Blue Planet Nutrients #ad - Prevents & withered flower & corrects: blossom end rot in vegetable plants, dry & fruit sets, stunted growth, tip burn in lettuce & cabbages, interveinal chlorosis, upward leaf curl.

Just dissolve a little bit in water and water your plants! Use in any type of garden on all types of plants from hydroponic, soil, even aeroponic! Easy to use, versatile, safe: Compatible with any fertilizers and nutrient systems. Prevent & plant tissue development, water, nutrient and carbon dioxide uptake, number of flower & correct common deficiencies plants suffer from such as upward leaf curl & blossom end rot! Increases: cell division & fruit sets, growth rates & crop maturity.
BrandBlue Planet Nutrients #ad
ManufacturerBlue Planet Nutrients #ad

10. TPS Nutrients


1 Gallon 128 oz Packaging May Vary, Cal-Mag Complete Calcium Magnesium Growing Supplement by TPS Nutrients

TPS Nutrients #ad - 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.

Packaging May Vary. Contains no harmful edta: tps never uses harmful EDTA in any of its formulations, unlike other major brands. Can also be used in hydroponic gardens at ½ to 1ml per gallon. Also contains vital organic acid complexes. Complete array of micros and organic acids: 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. Energy dense fertilizer for fast growing plants: For soil gardens, use every watering at 1-2ml per gallon during the entire growth and bloom phases.
BrandTPS Nutrients #ad
ManufacturerTPS Nutrients #ad
Height12 Inches
Length6 Inches
Weight9.5 Pounds
Width6 Inches
Part NumberTRUECMC1G