CalMag | Complete Calcium, Magnesium and Iron Plant Supplement

Cronk Nutrients

$14.88 - $4,339.88
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Guaranteed Analysis
Saftey Data

Calcium, Magnesium, & Iron

Cronk Nutrients CalMag is a concentrated blend of calcium, magnesium, iron, and nitrogen that is essential for optimal plant growth and development. Calcium provides support to plant cell walls and nutrient absorption, magnesium supports photosynthesis and energy production, iron is vital for chlorophyll synthesis, and nitrogen is critical for protein and DNA synthesis, leaf growth, and photosynthesis.

Guaranteed Analysis


Total Nitrogen (N) - 2%

2% Nitrate Nitrogen

Calcium (Ca) - 3.2%

Magnesium (Mg) - 1.2%

Iron (Fe) – 0.1%

0.1% Chelated Iron (Fe)

Derived from: Calcium Nitrate, Magnesium Nitrate, Iron EDTA

Saftey Data Sheet

CLICK HERE for a copy of Cronk Nutrients Sticky Bandit SDS


Cronk Nutrients' online store ships all over Canada and the United States from Canada & the United States. If your country isn't a standard option, please contact us and we can get a shipping quote. We offer free shipping on any order in North America over $99* CAD. We ship via UPS, Purolator, FedEx, Canada Post or from our inventory at either or 

All orders are processed within 1 business day. 

Your order will be marked as fulfilled from the moment it’s been boxed up in the warehouse awaiting for the courier to pick it up. Once your order has been fulfilled, you will receive an email with your tracking number. Your tracking details will appear once the courier has processed the package.  CLICK HERE for more information about our shipping policy. 

Safe for All Plant Types & Grow Mediums

At Cronk Nutrients, we pride ourselves on creating fertilizers that are compatible with a wide range of plants and growing mediums.

  • All Cronk Nutrients'fertilizers are compatible with a wide range of plants, including hemp, vegetables, fruits, and flowers, making them a versatile choice for any grower.
  • Can be used in different growing mediums, including indoor or outdoor soil, hydroponics, and coco coir, ensuring that they work equally well in different types of setups.
  • You can be confident that you're using high-quality and safe products when you choose Cronk Nutrients fertilizers, which are designed to be effective and compatible with a variety of plants and growing methods.



Dilute the suggested amount as per the chart on the back of the bottle into at least 1 litre of water. Apply once per week or every other watering. Safe to use in conjunction with any other nutrients. Use for the majority of the plant's life.