---
product_id: 519714673
title: "Bloom City Cal Mag Plant Supplement with Micronutrients - Concentrated Calcium Fertilizer for Garden & Hydroponics - Calmag for Plants, Gallon (128 oz)"
brand: "bloom city"
price: "€ 384.51"
currency: EUR
in_stock: true
reviews_count: 5
category: "Bloom City"
url: https://www.desertcart.com.cy/products/519714673-bloom-city-cal-mag-plant-supplement-with-micronutrients-concentrated-calcium
store_origin: CY
region: Cyprus
---

# Bioactivated fulvic acid for max nutrient uptake 9+ micronutrients for peak plant health 100% organic chelates, no harmful EDTA Bloom City Cal Mag Plant Supplement with Micronutrients - Concentrated Calcium Fertilizer for Garden & Hydroponics - Calmag for Plants, Gallon (128 oz)

**Brand:** bloom city
**Price:** € 384.51
**Availability:** ✅ In Stock

## Summary

> 🌱 Elevate your garden game with the pure power of Bloom City Cal-Mag!

## Quick Answers

- **What is this?** Bloom City Cal Mag Plant Supplement with Micronutrients - Concentrated Calcium Fertilizer for Garden & Hydroponics - Calmag for Plants, Gallon (128 oz) by bloom city
- **How much does it cost?** € 384.51 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.cy](https://www.desertcart.com.cy/products/519714673-bloom-city-cal-mag-plant-supplement-with-micronutrients-concentrated-calcium)

## Best For

- bloom city enthusiasts

## Why This Product

- Trusted bloom city brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Clean & Conscious:** Organic chelates only—healthier for your garden, you, and the planet
- • **Deficiency Defense:** Prevents common growth issues like Blossom End Rot for stronger plants
- • **Bioactivated Formula:** Fulvic acid chelation ensures rapid, efficient nutrient absorption
- • **Universal Compatibility:** Seamlessly integrates with any nutrient system or growth medium
- • **Ultimate Micronutrient Boost:** Packed with Iron, Zinc, Boron & more to power every growth stage

## Overview

Bloom City Cal Mag is a premium, gallon-sized plant supplement delivering calcium, magnesium, and over nine essential micronutrients in a fully organic, fulvic acid-chelated formula. Designed for soil and hydroponic systems alike, it prevents common nutrient deficiencies and promotes robust stalk and leaf growth. Free from harmful chemicals like EDTA, it’s compatible with all nutrient regimens and ideal for professional growers seeking clean, effective, and sustainable plant nutrition.

## Description

Product description Bloom City’s Cal-Mag formulation contains calcium, magnesium, and a wide array of micro-nutrients: Iron (Fe), Zinc (Zn), Boron (B), Copper (Cu), Manganese (Mn), Molybdenum (Mo), Sulfur (S). Using 100% organic fulvic acid to naturally chelate minerals results in compounds that plants absorb easily and quickly. Cal-Mag improves stalk and leaf growth and prevents common deficiencies. For use on both Soil and Hydro gardens and on both indoor and outdoor plants. Fully compatible with all growth mediums and can even be applied as a foliar spray for rapid uptake. Add Cal-Mag to every watering for a lush green canopy. Other brands are often filled with diluted industrial grade chemicals. Bloom City’s scientific approach sources only the highest grade minerals and plant nutrients to ensure healthy growth. The only brand that is fully and organically chelated for superior uptake and bio-availability. Bloom City nutrient systems are an ultra-premium line designed for the craft grower. Our nutrients and supplements are simple to use and produce amazing results. Leave behind the confusing and dirty world of Big-Ag fertilizers and upgrade to Bloom City. Bloom City’s products are made in America from the highest quality sources by a small team of passionate plant scientists. All our ingredients are better for plants, better for you, and better for the planet. Bloom City is simply the best choice for the conscientious grower. Directions 1. Apply Cal-Mag in every stage of growth for strong stalk and leaf health. 2. Apply with every watering for the full benefit. 3. Can be used as a foliar spray for rapid uptake. 4. Compatible with any nutrient system. P.when('A').execute(function(A) { A.on('a:expander:toggle_description:toggle:collapse', function(data) { window.scroll(0, data.expander.$expander[0].offsetTop-100); }); }); Safety Warning Handle with care. Keep out of reach of children and pets. Avoid contact with skin and eyes. In case of accidental contact, rinse immediately with plenty of water. Do not ingest. Store in a cool, dry place away from heat sources and open flames. Dispose of according to local regulations. See more

Review: This finally solved my problem of Blossom End Rot, but it took a few weeks.
Review: Great product

## Features

- Harmful if swallowed.
- May cause respiratory irritation.
- CONTAINS MORE MICRONUTRIENTS THAN ANY OTHER BRAND: Iron (Fe), Zinc (Zn), Boron (B), Copper (Cu), Manganese (Mn), Molybdenum (Mo), Sulfur (S)
- 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
- PREVENTS COMMON GROWTH DEFICIENCIES: Apply Cal-Mag in every stage of growth for strong stalk and leaf health. 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
- 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. We choose only the highest quality ingredient sources and manufacturing methods to create the world’s best craft growing nutrient systems

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B073ZP47ZN |
| Batteries Required? | No |
| Batteries included? | No |
| Coverage | Full |
| Customer Reviews | 4.6 4.6 out of 5 stars (712) |
| Date First Available | 17 July 2017 |
| Item Weight | 3.62 kg |
| Item model number | Cal-Mag UltraPure | Plus Micros |
| Manufacturer | Bloom City |
| Package Dimensions | 30.4 x 15.29 x 15.09 cm; 3.63 kg |
| Part number | BCALMAG1G |
| Size | Gallon (128 oz) |
| Specific uses | Plant Growth |

## Product Details

- **Brand:** Bloom City
- **Item form:** Liquid
- **Item weight:** 128 Ounces
- **Liquid volume:** 1 Gallons
- **Specific uses for product:** Plant Growth

## Images

![Bloom City Cal Mag Plant Supplement with Micronutrients - Concentrated Calcium Fertilizer for Garden & Hydroponics - Calmag for Plants, Gallon (128 oz) - Image 1](https://m.media-amazon.com/images/I/61BOCBiCtuL.jpg)

## Questions & Answers

**Q: Is there nitrogen in this?  It would be helpful for the seller to post the bottle back side label.**
A: Hey there, good idea on posting the labels, adding that to my to-do list!  To answer your question, yes there is Nitrogen.  Here is the guaranteed analysis of nutrient content on our Cal-Mag.  Total Nitrogen 2%, 2% Nitrate Nitrogen, Calcium 2%, Magnesium 0.6%, Boron .002%, Copper .003%, iron .004%, Manganese .004%, Zinc .004%.  Derived from: Calcium Nitrate, Magnesium Nitrate, Boric Acid, Copper Sulfate, Ferric Sulfate, Manganese Sulfate, Zinc Sulfate.

Hope that helps!

James - Bloom City Crew

**Q: Site says it is compatible with all  growth mediums, but bottle says for hydroponic use ONLY. Which is it?**
A: That terminology on the bottle is unfortunately a labeling requirement placed on us by regulators.  It is compatible with all growing mediums, including soil, cocoa coir, peat, hydroponic systems, etc.  

Thanks,
James - Bloom City Crew

**Q: Can this be mixed with epsom salt for additional magnesium as a foliar spray or added as a root drench?**
A: Hi, Great question.  It can be added to epsom salt in a water solution, however we suggest you try this Cal-Mag first on the plants - its probably more than enough magnesium.  We use highly bio-available mineral forms and add organic acids to the product to increase uptake.  Its also great as both a foliar spray and a root drench!  Let us know how the plants grow!

**Q: What would be the salt in ppm per dose added to ro or distilled water?**
A: Hi, thanks for the question!  The PPM added would be about 120 for the low dose of 2ml per gallon, and 240 for the high dose of 4ml per gallon.  Let us know if you have any other questions!

James - Bloom City Crew

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by C***M on 2 October 2025*

This finally solved my problem of Blossom End Rot, but it took a few weeks.

### ⭐⭐⭐⭐⭐ Review
*by L***E on 18 August 2025*

Great product

### ⭐⭐⭐⭐⭐ Review
*by M***O on 8 July 2025*

Nice Stuff. Great plant 🪴 CALMAG

## Frequently Bought Together

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*Product available on Desertcart Cyprus*
*Store origin: CY*
*Last updated: 2026-03-05*