---
product_id: 13563827
title: "CalMag Plus Iron Liquid Plant Supplement (128 fl oz) Gallon | for All Plants & Gardens | Concentrated Calcium Magnesium Iron | Makes Up to 1,260 Gallons of Ready to Feed | Blue Planet Nutrients"
brand: "blue planet nutrients"
price: "$193.17"
currency: USD
in_stock: true
reviews_count: 8
category: "Blue Planet Nutrients"
url: https://www.desertcart.us/products/13563827-calmag-plus-iron-liquid-plant-supplement-128-fl-oz-gallon
store_origin: US
region: United States of America
---

# Feeds up to 1,260 gallons ready-to-use 128 fl oz concentrated liquid Calcium, Magnesium & Iron triple boost CalMag Plus Iron Liquid Plant Supplement (128 fl oz) Gallon | for All Plants & Gardens | Concentrated Calcium Magnesium Iron | Makes Up to 1,260 Gallons of Ready to Feed | Blue Planet Nutrients

**Brand:** blue planet nutrients
**Price:** $193.17
**Availability:** ✅ In Stock

## Summary

> 🌿 Feed your garden’s future with the power of CalMag Plus!

## Quick Answers

- **What is this?** CalMag Plus Iron Liquid Plant Supplement (128 fl oz) Gallon | for All Plants & Gardens | Concentrated Calcium Magnesium Iron | Makes Up to 1,260 Gallons of Ready to Feed | Blue Planet Nutrients by blue planet nutrients
- **How much does it cost?** $193.17 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/13563827-calmag-plus-iron-liquid-plant-supplement-128-fl-oz-gallon)

## Best For

- blue planet nutrients enthusiasts

## Why This Product

- Trusted blue planet nutrients brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Triple Mineral Power:** Calcium, magnesium, and iron fuel photosynthesis & nutrient transport
- • **Effortless Application:** Dilute or foliar spray—flexible feeding for every plant stage
- • **Trusted Pro-Grade Formula:** Blue Planet Nutrients, a decade of quality gardening innovation
- • **Ultimate Deficiency Defense:** Prevents & corrects blossom end rot, leaf curl, and nutrient gaps fast
- • **Universal Garden Compatibility:** Perfect for hydroponic, soil, aeroponic & soil-less setups

## Overview

CalMag Plus Iron Liquid Plant Supplement by Blue Planet Nutrients is a concentrated 128 fl oz formula delivering essential calcium, magnesium, and iron to all plant types. Designed for versatile use in hydroponic, soil, and aeroponic gardens, it prevents common nutrient deficiencies and supports robust plant growth. One gallon makes up to 1,260 gallons of ready-to-feed solution, trusted by gardeners for fast, effective results.

## Description

desertcart.com : CalMag Plus Iron Liquid Plant Supplement (128 fl oz) Gallon | for All Plants & Gardens | Concentrated Calcium Magnesium Iron | Makes Up to 1,260 Gallons of Ready to Feed | Blue Planet Nutrients : Patio, Lawn & Garden

Review: great product - works great for my gardening
Review: This stuff works really well - Works extremely well at correcting or preventing calcium magnesium or iron deficiencies I use it daily and have been using it for years same company same product and have not been disappointed not even once this stuff is amazing not only that but it corrects the problem fast and is fairly cheap!

## Features

- CORRECT & PREVENT DEFICIENCIES: Feed CalMag to your plants as needed to prevent and correct common deficiencies such as blossom end rot and upward leaf curl.
- CALCIUM, MAGNESIUM, IRON SUPPLEMENT: CalMag provides plants with calcium, magnesium, and iron which are key elements in photosynthesis, absorption & transport of nutrients within the plant, and are vital to the healthy development of all varieties of plants.
- VERSATILE FORMULA: Can be fed to all varieties of plants growing in almost any type of garden such as hydroponic, soil, aeroponic, and all soil-less media! Blue Planet Nutrients CalMag supplement can be used along with other garden fertilizers and supplements.
- EASY TO USE: Simply dilute a small amount per gallon of water and water your plants! CalMag can also be used as a foliar spray and as a soak for coco coir prior to use as a hydroponic growing medium.
- BLUE PLANET NUTRIENTS: Trusted brand from Houston, TX providing high quality, professional grade garden fertilizers and supplements since 2010.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00HEWBDXK |
| Best Sellers Rank | #135,098 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #2,759 in Garden Fertilizers |
| Brand | Blue Planet Nutrients |
| Brand Name | Blue Planet Nutrients |
| Coverage | Medium |
| Customer Reviews | 4.7 out of 5 stars 1,780 Reviews |
| Item Form | Liquid |
| Item Weight | 128 Ounces |
| Liquid Volume | 1 Gallons |
| Manufacturer | Blue Planet Nutrients |
| Mixing Ratio | Seedlings/Small Plants: 1:32000, Medium-Large/Mature Plants: 1:16000 |
| Model Number | 4336441778 |
| Specific Uses For Product | Fertilizer Supplement for All Plants and Gardens |
| Target Species | all plants |
| UPC | 609408402760 |
| Unit Count | 128 Fluid Ounces |

## Product Details

- **Brand:** Blue Planet Nutrients
- **Item Weight:** 128 Ounces
- **Item Form:** Liquid
- **Liquid Volume:** 1 Gallons
- **Specific Uses For Product:** Fertilizer Supplement for All Plants and Gardens

## Images

![CalMag Plus Iron Liquid Plant Supplement (128 fl oz) Gallon | for All Plants & Gardens | Concentrated Calcium Magnesium Iron | Makes Up to 1,260 Gallons of Ready to Feed | Blue Planet Nutrients - Image 1](https://m.media-amazon.com/images/I/61fWCNpk6dL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ great product
*by A***R on June 9, 2025*

works great for my gardening

### ⭐⭐⭐⭐⭐ This stuff works really well
*by C***K on May 8, 2024*

Works extremely well at correcting or preventing calcium magnesium or iron deficiencies I use it daily and have been using it for years same company same product and have not been disappointed not even once this stuff is amazing not only that but it corrects the problem fast and is fairly cheap!

### ⭐⭐⭐⭐⭐ Nice addative for plant health.
*by P***E on February 16, 2026*

Big difference in plant health. Works well for cannabis.

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-05-20*