---
product_id: 513826659
title: "True Plant Science Cal-Mag OAC Plant Nutrient Supplement Gallon (128 oz) - Liquid Fertilizer for All Indoor & Outdoor Plants"
brand: "tps nutrients"
price: "€ 91.17"
currency: EUR
in_stock: false
reviews_count: 5
url: https://www.desertcart.sk/products/513826659-true-plant-science-cal-mag-oac-plant-nutrient-supplement-gallon
store_origin: SK
region: Slovakia
---

# Supports all indoor & outdoor plants 128 oz liquid formula Easy 5-10 ml per gallon dosing True Plant Science Cal-Mag OAC Plant Nutrient Supplement Gallon (128 oz) - Liquid Fertilizer for All Indoor & Outdoor Plants

**Brand:** tps nutrients
**Price:** € 91.17
**Availability:** ❌ Out of Stock

## Summary

> 🌱 Unlock your plants’ full potential with every drop!

## Quick Answers

- **What is this?** True Plant Science Cal-Mag OAC Plant Nutrient Supplement Gallon (128 oz) - Liquid Fertilizer for All Indoor & Outdoor Plants by tps nutrients
- **How much does it cost?** € 91.17 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/513826659-true-plant-science-cal-mag-oac-plant-nutrient-supplement-gallon)

## Best For

- tps nutrients enthusiasts

## Why This Product

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

## Key Features

- • **Lush, Vibrant Results:** Transforms your garden into a thriving, envy-inducing green oasis
- • **Effortless Application:** Simple mix-and-water formula saves time and maximizes absorption
- • **Universal Plant Booster:** Perfect for every plant type—indoor or outdoor, beginner or pro
- • **Combat Nutrient Deficiencies:** Targets weak growth and common plant health issues head-on
- • **All-in-One Nutrient Powerhouse:** Calcium, Magnesium, Zinc, Iron & micronutrients for unstoppable growth

## Overview

True Plant Science Cal-Mag OAC is a premium 128 oz liquid fertilizer delivering essential Calcium, Magnesium, Zinc, Iron, and micronutrients. Designed for all indoor and outdoor plants, it promotes healthy, vigorous growth by addressing nutrient deficiencies with an easy-to-use dosing system. Ideal for gardeners seeking lush, vibrant plants with minimal effort.

## Description

Product description Unlock the full potential of your plants with our premium liquid Calmag fertilizer, expertly crafted to provide essential nutrients for thriving growth. This powerful blend includes vital Calcium, Magnesium, and Zinc, Iron, and Micronutrients ensuring your plants receive the nourishment they need for robust health. Whether you’re a seasoned gardener or a budding enthusiast, this Calmag solution is suitable for all types of indoor and outdoor plants, promoting flourishing growth in any environment. Many growers face challenges such as nutrient deficiencies, weak growth, or poor yields, but this liquid fertilizer helps address those concerns effectively. With easy application and rapid absorption, it supports the vitality of your plants. Embrace the joy of gardening with confidence—utilize this Calmag for plants and see your greenery thrive like never before! Directions 1. Determine gardening method. 2. Add CalMag OAC to every watering as per recommended rates. 3. Consider foliar spray application when appropriate. 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 Keep out of reach of children and pets. Avoid contact with skin, eyes, and clothing. In case of accidental contact, wash off with water. Do not ingest. For best results, use gloves and protective eyewear when handling. Store in a cool, dry place. See more

Review: Really helps my tomato’s to set. Some heirlooms are finicky.
Review: The plants like the nutrients and grow fast, but the chemical has a vinegar smell that is unpleasant to the user until it is mixed with water. The mix could be a little stronger concentration. I used a separate micronutrient mix that also has calcium and magnesium, so it mixes well, but if you plan on using it as a stand-alone product, you may need to use more than the instructions call for.

## Features

- Toxic to aquatic life with long lasting effects.
- Simple Mixing Solutions: Just add 5-10 ml of cal mag liquid fertilizer per gallon of water and water your plants as you normally would for healthy growth.
- Essential Nutrients: This calmag fertilizer provides vital Calcium, Magnesium, zinc, iron, and micronutrients ensuring your plants receive the nutrients they need to thrive.
- Versatile for All Plants: Ideal for all types of indoor and outdoor plants, this cal mag solution supports flourishing growth for both beginner and experienced gardeners.
- Addresses Common Concerns: Many growers worry about nutrient deficiencies and weak growth. This cal mag for plants helps address those issues for strong, healthy plants.
- Enhances Plant Vitality: Use our organic cal mag to support growth and improve the vitality of your plants, keeping them lush and bountiful.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Product Dimensions | 15.24 x 15.24 x 30.48 cm; 3.63 kg |
| Part number | TPSCMOAC1G |
| Item display height | 12 inches |
| Item display weight | 4.08 kg |
| Manufacturer | True Plant Science |
| Item model number | 857611006170 |
| ASIN | B07CWQ7FPX |

## Product Details

- **Brand:** TPS NUTRIENTS
- **Item weight:** 128 Ounces
- **Item form:** Liquid
- **Coverage:** Organic
- **Liquid volume:** 128 Fluid Ounces

## Images

![True Plant Science Cal-Mag OAC Plant Nutrient Supplement Gallon (128 oz) - Liquid Fertilizer for All Indoor & Outdoor Plants - Image 1](https://m.media-amazon.com/images/I/71Ak4rg7mJL.jpg)
![True Plant Science Cal-Mag OAC Plant Nutrient Supplement Gallon (128 oz) - Liquid Fertilizer for All Indoor & Outdoor Plants - Image 2](https://m.media-amazon.com/images/I/818MsVAKXqL.jpg)
![True Plant Science Cal-Mag OAC Plant Nutrient Supplement Gallon (128 oz) - Liquid Fertilizer for All Indoor & Outdoor Plants - Image 3](https://m.media-amazon.com/images/I/71aMW4zxVtL.jpg)
![True Plant Science Cal-Mag OAC Plant Nutrient Supplement Gallon (128 oz) - Liquid Fertilizer for All Indoor & Outdoor Plants - Image 4](https://m.media-amazon.com/images/I/71+4QOnQbdL.jpg)
![True Plant Science Cal-Mag OAC Plant Nutrient Supplement Gallon (128 oz) - Liquid Fertilizer for All Indoor & Outdoor Plants - Image 5](https://m.media-amazon.com/images/I/713L97DLjYL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by M***. on 12 June 2025*

Really helps my tomato’s to set. Some heirlooms are finicky.

### ⭐⭐⭐⭐ Review
*by E***. on 10 August 2024*

The plants like the nutrients and grow fast, but the chemical has a vinegar smell that is unpleasant to the user until it is mixed with water. The mix could be a little stronger concentration. I used a separate micronutrient mix that also has calcium and magnesium, so it mixes well, but if you plan on using it as a stand-alone product, you may need to use more than the instructions call for.

### ⭐⭐⭐⭐⭐ Review
*by A***R on 25 October 2025*

Plants love it. Organic.

## Frequently Bought Together

- Organic Cal-Mag OAC Plant Nutrient and Supplement, Plus Iron and Micronutrients by TPS Nutrients, 1 Gallon (128 oz)
- Silica Gold Plant Strength Nutrient and Supplement with Bioavailable Silicon by TPS Nutrients, 1 Gallon (128 oz)
- Signal Terpene Enhancer Plant Nutrient and Supplement, Flower Hardener and Increases Flavor by TPS Nutrients, 1 Gallon (128 oz)

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*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-03-01*