---
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: "€ 189.56"
currency: EUR
in_stock: true
reviews_count: 8
category: "Blue Planet Nutrients"
url: https://www.desertcart.gr/products/13563827-calmag-plus-iron-liquid-plant-supplement-128-fl-oz-gallon
store_origin: GR
region: Greece
---

# Feeds up to 1,260 gallons Concentrated liquid formula Multi-application: watering, foliar, soak 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:** € 189.56
**Availability:** ✅ In Stock

## Summary

> 🌿 Feed your plants like a pro, watch your garden glow!

## 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?** € 189.56 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/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 Nutrient Power:** Calcium, Magnesium & Iron boost photosynthesis & nutrient uptake
- • **Universal Garden Ally:** Perfect for hydroponic, soil, aeroponic & soilless setups
- • **Effortless Application:** Dilute & feed or spray—flexible use for every plant parent
- • **Trusted Pro-Grade Formula:** Blue Planet Nutrients quality since 2010, loved by 1,700+ growers
- • **Ultimate Deficiency Defense:** Prevents blossom end rot & leaf curl for flawless growth

## Overview

CalMag Plus Iron Liquid is a concentrated 128 fl oz plant supplement delivering essential calcium, magnesium, and iron to prevent common nutrient deficiencies. Suitable for all plant types and growing methods, it dilutes to make up to 1,260 gallons of ready-to-use feed. Trusted by thousands, this versatile formula supports robust photosynthesis and nutrient transport, ensuring vibrant, healthy plants with easy watering, foliar spray, or soaking applications.

## 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 supplement for Hoyas.
Review: Nice addative for plant health. - Big difference in plant health. Works well for cannabis.

## 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 |
| Application Method | watering, foliar spray, soak |
| Best Sellers Rank | #304,057 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #4,166 in Garden Fertilizers |
| Brand | Blue Planet Nutrients |
| Brand Name | Blue Planet Nutrients |
| Coverage | Medium |
| Customer Reviews | 4.7 out of 5 stars 1,783 Reviews |
| Item Form | Liquid |
| Item Weight | 8 pounds |
| Liquid Volume | 1 gallons |
| Manufacturer | Blue Planet Nutrients |
| Mixing Ratio | Seedlings/Small Plants: 1:32000, Medium-Large/Mature Plants: 1:16000 |
| Model Number | 4336441778 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Part 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)
![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 2](https://m.media-amazon.com/images/I/61QQEL2nmRL.jpg)
![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 3](https://m.media-amazon.com/images/I/8119o+Cn7PL.jpg)
![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 4](https://m.media-amazon.com/images/I/71ly9jD1kdL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ 👍🏼👍🏼👍🏼
*by S***H on May 26, 2026*

Great supplement for Hoyas.

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

Big difference in plant health. Works well for cannabis.

### ⭐⭐⭐⭐⭐ 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!

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*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-09-05*