---
product_id: 201944844
title: "Additive / Fertilizer Calcium, Magnesium and Iron Grotek Cal-Max (1L)"
brand: "grotek"
price: "R1906"
currency: ZAR
in_stock: true
category: "Grotek"
url: https://www.desertcart.co.za/products/201944844-additive-fertilizer-calcium-magnesium-and-iron-grotek-cal-max-1l
store_origin: ZA
region: South Africa
---

# Easy foliar spray application 3 key nutrients: Ca, Mg, Fe Prevents heat-stress deficiencies Additive / Fertilizer Calcium, Magnesium and Iron Grotek Cal-Max (1L)

**Brand:** grotek
**Price:** R1906
**Availability:** ✅ In Stock

## Summary

> 🌿 Boost your garden’s glow with Grotek Cal-Max—because your plants deserve the VIP treatment!

## Quick Answers

- **What is this?** Additive / Fertilizer Calcium, Magnesium and Iron Grotek Cal-Max (1L) by grotek
- **How much does it cost?** R1906 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/201944844-additive-fertilizer-calcium-magnesium-and-iron-grotek-cal-max-1l)

## Best For

- grotek enthusiasts

## Why This Product

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

## Key Features

- • **Heatwave Defense:** Specifically designed to prevent nutrient deficiencies during high temperatures
- • **Foliar Spray Ready:** Quick absorption through leaves for faster, visible results
- • **No Fuss, No Assembly:** Ready to use straight from the bottle—just spray and grow
- • **Triple Nutrient Power:** Calcium, Magnesium, and Iron in one potent formula for peak plant health
- • **Tip Burn & Rot Prevention:** Stops tip burns and flower end rot to keep your crops flawless

## Overview

Grotek Cal-Max (1L) is a liquid fertilizer additive delivering essential calcium, magnesium, and iron to prevent nutrient deficiencies, especially under heat stress. Ideal for foliar application, it supports accelerated growth and prevents common issues like tip burn and flower end rot, ensuring maximum crop yield and quality.

## Description

Product description The Additive / Fertilizer Calcium, Magnesium and Iron Grotek Cal-Max (1L) provides the additional calcium, magnesium and iron needed to support maximum production. Directions Apply as a foliar spray to treat nutrient deficiencies or use as a preventative supplement in your nutrient program 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 and eyes. Wear protective clothing, gloves and eye/face protection during application. See more

## Features

- Causes serious eye irritation.
- Causes skin irritation.
- Helps prevent nutrient deficiencies caused during high temperatures and growth cycle
- Provides calcium, magnesium and iron for maximum production
- Can be used as a preventive supplement to prevent tip burns and flower end rot
- No assembly required

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B004JKFQZG |
| Best Sellers Rank | 141,460 in Computers & Accessories ( See Top 100 in Computers & Accessories ) 565 in Flower Fertilisers 110,520 in Accessories (Computers & Accessories) |
| Brand Name | Grotek |
| Coverage | plants in general |
| Customer Reviews | 4.2 4.2 out of 5 stars (41) |
| Global Trade Identification Number | 00670829815132 |
| Item Form | Liquid |
| Item Weight | 2.5 Pounds |
| Liquid Volume | 33.81 Fluid Ounces |
| Manufacturer | Grotek™ |
| Mixing Ratio | 20-20-20 |
| Model Number | 732960 |
| Number of Items | 1 |
| Part Number | GTCLMXQT |
| Specific Uses For Product | High temperature plant growing, accelerated plant growth, foliar nutrient supplementation, prevent the tip from burning on lettuce, preventing final flower rot on tomatoes |
| Target Species | plants in general |
| UPC | 670829815132 |
| Unit Count | 1000.0 millilitre |

## Product Details

- **Brand:** Grotek
- **Item form:** Liquid
- **Item weight:** 2.5 Pounds
- **Liquid volume:** 33.81 Fluid Ounces

## Images

![Additive / Fertilizer Calcium, Magnesium and Iron Grotek Cal-Max (1L) - Image 1](https://m.media-amazon.com/images/I/61M+p-9Oj9L.jpg)

## Frequently Bought Together

- Additive / Fertilizer Calcium, Magnesium and Iron Grotek Cal-Max (1L)
- Clonex 50ml Liquid
- Canna Coco 5 Litre A+B Set Nutrients Hydroponics

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**Shop now:** [https://www.desertcart.co.za/products/201944844-additive-fertilizer-calcium-magnesium-and-iron-grotek-cal-max-1l](https://www.desertcart.co.za/products/201944844-additive-fertilizer-calcium-magnesium-and-iron-grotek-cal-max-1l)

---

*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-09-15*