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Plant Cal Mag Supplements

10 Best Plant Cal Mag Supplements 2025 in the United States

Name: General Hydroponics CALiMAGic 1-0-0, Concentrated Blend of Calcium & Magnesium, Secondary Nutrient Deficiencies Helps Prevent Blossom End Rot & Tip Burn, Clean, Soluble, 1-Quart
Brand: General Hydroponics
Price: 16.99 USD
Availability: InStock

Diatomaceous Earth Food Grade (Fresh Water Type) 2lb Zipper Bag Codex DE (0.2)

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Winner

General Hydroponics

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

9.9

score

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Diatomaceous Earth Food Grade (Fresh Water Type) 2lb Zipper Bag Codex DE (0.2)

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Bloom City

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

9.8

score

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Humboldts Secret

Editor’s Choice

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

9.5

score

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TPS NUTRIENTS

Organic Cal-Mag OAC Plant Nutrient and Supplement, Plus Iron and Micronutrients by TPS Nutrients, 8 oz (250mL)

9.3

score

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FoxFarm

FoxFarm BushDoctor Cal-Mag (1 Pint)

9.1

score

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VIVOSUN

VIVOSUN Cal+Mag+Iron (2-0-0), Calcium, Magnesium & Iron Supplement, Liquid Nutrient Fertilizer for All Plants, Concentrated Plant Food for Soil/Soilless Cultivation, Hydroponics, 1 Quart

8.8

score

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TPS NUTRIENTS

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

8.5

score

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Botanicare

Botanicare Cal-Mag Plus Quart Plant Supplement 1

8.3

score

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GS Plant Foods

GS Plant Foods Cal-Mag 420 Dry Super Concentrate, Makes 420 Gallons of Nutrient Solution, 18 Ounces, Calcium/Magnesium Fertilizer

8.0

score

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#10

Twin Canaries Liquid Volume Conversion Chart

FoxFarm Bush Doctor Cal-Mag Organic | Calcium and Magnesium Plant Supplement | 1 Quart (32 fl oz) + Twin Canaries Chart

7.7

score

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10 Best Plant Cal Mag Supplements 2025 in the United States

Diatomaceous Earth Food Grade (Fresh Water Type) 2lb Zipper Bag Codex DE (0.2)

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

Diatomaceous Earth Food Grade (Fresh Water Type) 2lb Zipper Bag Codex DE (0.2)

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

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

Organic Cal-Mag OAC Plant Nutrient and Supplement, Plus Iron and Micronutrients by TPS Nutrients, 8 oz (250mL)

FoxFarm BushDoctor Cal-Mag (1 Pint)

Southern Homewares Organic Food Grade Diatomaceous Earth 1lb - All-Natural, Safe Food Additive - Anticaking Agent - Reusable Zipper Bag - Versatile Diatomaceous Earth for Household, Lawn & Yard

Diatomaceous Earth Food Grade (Fresh Water Type) 2lb Zipper Bag Codex DE (0.2)

Best Plant and Root Enzymes - Humboldts Secret Plant Enzymes - 7,000 Active Units of Enzyme per Milliliter. (5 Gallon)

Humboldts Secret Flower Stacker – Best Flowering Formula for Bigger Harvests - Flowering Plant Food – Nutrient System for Potting Soil for Indoor & Outdoor Plants - 5 Gallons

Humboldts Secret Calcium, Magnesium and Iron Supplement – Hydroponic Supplies – Liquid Nutrient Fertilizer – Supports Vegetative and Flowering Stage (5 Gallon)

VIVOSUN Cal+Mag+Iron (2-0-0), Calcium, Magnesium & Iron Supplement, Liquid Nutrient Fertilizer for All Plants, Concentrated Plant Food for Soil/Soilless Cultivation, Hydroponics, 1 Quart

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

Botanicare Cal-Mag Plus Quart Plant Supplement 1

GS Plant Foods Cal-Mag 420 Dry Super Concentrate, Makes 420 Gallons of Nutrient Solution, 18 Ounces, Calcium/Magnesium Fertilizer

FoxFarm Bush Doctor Cal-Mag Organic | Calcium and Magnesium Plant Supplement | 1 Quart (32 fl oz) + Twin Canaries Chart

Cal Mag Supplements

Supplement For Plants

Calcium Supplements