---
product_id: 68507987
title: "CalMag & Iron | Calcium, Magnesium & Chelated Iron Nutrient Fertilizer | Hydroponic Supplies for Vegetative & Flowering Growth in Soil, Coco, Hydroponics or RO Water | 1 Gallon"
brand: "humboldts secret"
price: "4322939₫"
currency: VND
in_stock: true
reviews_count: 8
url: https://www.desertcart.vn/products/68507987-calmag-and-iron-calcium-magnesium-and-chelated-iron-nutrient-fertilizer
store_origin: VN
region: Vietnam
---

# fast-acting nutrient recovery max absorption for lush growth 3 key minerals for plant strength CalMag & Iron | Calcium, Magnesium & Chelated Iron Nutrient Fertilizer | Hydroponic Supplies for Vegetative & Flowering Growth in Soil, Coco, Hydroponics or RO Water | 1 Gallon

**Brand:** humboldts secret
**Price:** 4322939₫
**Availability:** ✅ In Stock

## Summary

> 🌱 Unlock your garden’s secret weapon for unstoppable growth!

## Quick Answers

- **What is this?** CalMag & Iron | Calcium, Magnesium & Chelated Iron Nutrient Fertilizer | Hydroponic Supplies for Vegetative & Flowering Growth in Soil, Coco, Hydroponics or RO Water | 1 Gallon by humboldts secret
- **How much does it cost?** 4322939₫ with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/68507987-calmag-and-iron-calcium-magnesium-and-chelated-iron-nutrient-fertilizer)

## Best For

- humboldts secret enthusiasts

## Why This Product

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

## Key Features

- • **Rapid Recovery Boost:** Fast-acting formula to fix nutrient imbalances and revive plants
- • **Triple Mineral Power:** Calcium, Magnesium & Chelated Iron for unbeatable plant health
- • **Optimized Nutrient Uptake:** Maximizes absorption for vigorous vegetative and flowering growth
- • **Universal Garden Compatibility:** Perfect for soil, hydroponics, coco, and RO water setups
- • **Enhanced Fruit & Flower Quality:** Prevents blossom end rot and promotes vibrant blooms

## Overview

Humboldts Secret CalMag & Iron is a premium 3-in-1 nutrient fertilizer delivering calcium, magnesium, and chelated iron to support strong stems, vibrant leaves, and abundant flowering. Designed for all growing mediums including soil, hydroponics, coco coir, and RO water, it rapidly corrects nutrient deficiencies and maximizes mineral absorption to ensure healthy, productive plants at every stage.

## Description

Full description not available

## Features

- Strength for Every Stage: Humboldts Secret supplement with cal mag for plants delivers calcium, magnesium, and chelated iron to prevent deficiencies. It fortifies stems, improves leaf color, and supports flowering and fruiting plants for vigorous, healthy growth in any type of garden.
- Fast-Acting Plant Recovery: Our balanced formula with calmag and chelated iron targets issues caused by nutrient imbalances, helping plants recover quickly. It boosts photosynthesis, nutrient transport, and root strength in vegetables, flowers, and herbs grown indoors or outdoors.
- Maximum Absorption Power: Using our cal-mag for plants blend with added iron improves uptake efficiency, ensuring these essential minerals are fully utilized. It supports lush vegetative growth and abundant blooms, delivering consistent results for home or commercial growers.
- Reliable Across All Setups: Humboldts Secret cal mag fertilizer with iron works in hydroponics, soil, and container gardens. It strengthens plant structure, enhances fruit quality, and ensures balanced nutrition in indoor and outdoor systems for dependable, healthy harvests.
- Focused on Fruiting Success: Our formula with calcium and magnesium for plants plus chelated iron benefits crops in coco coir or reverse osmosis water. It helps prevent blossom end rot, promotes firm fruit set, and improves nutrient absorption for strong, productive plants in challenging conditions.

## Product Details

- **Brand:** Humboldts Secret
- **Item Form:** Liquid
- **Liquid Volume:** 128 Fluid Ounces
- **Specific Uses For Product:** Hydroponic
- **Global Trade Identification Number:** 00648260730406

## Images

![CalMag & Iron | Calcium, Magnesium & Chelated Iron Nutrient Fertilizer | Hydroponic Supplies for Vegetative & Flowering Growth in Soil, Coco, Hydroponics or RO Water | 1 Gallon - Image 1](https://m.media-amazon.com/images/I/71fXSXEGgLL.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    What's the product wasn't so expensive
  

*by D***T on Reviewed in the United States on October 13, 2024*

Would love to continue using this product it's just too expensive I rather try to do a home remedy putting together fertilizer to my soil to be rich then use this product later on down the line when the nutrition runs out the soil very good love it it spoke my plants up the leaves were blown in the wind I wish you had more nutritional stuff

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Worked fast
  

*by F***O on Reviewed in the United States on September 9, 2024*

I bought this because my mother's tomato plants and mine had tomato blossom end rot for the first time.  After just 2 applications our plants started producing rot free tomatoes. Worked great!

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Will order again
  

*by J***  on Reviewed in the United States on August 22, 2024*

Size was great lasts long time but works quickly. Easy to usedursble seal was great promoted growth no smell

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**Shop now:** [https://www.desertcart.vn/products/68507987-calmag-and-iron-calcium-magnesium-and-chelated-iron-nutrient-fertilizer](https://www.desertcart.vn/products/68507987-calmag-and-iron-calcium-magnesium-and-chelated-iron-nutrient-fertilizer)

---

*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-02-22*