---
product_id: 270508968
title: "Professional Grade Ultra Pure Cal-Mag Growing Fertilizer, 1/2 Pint (8 oz)"
brand: "bloom city"
price: "231.41 DT"
currency: TND
in_stock: true
reviews_count: 8
category: "Bloom City"
url: https://www.desertcart.tn/products/270508968-professional-grade-ultra-pure-cal-mag-growing-fertilizer-1-2
store_origin: TN
region: Tunisia
---

# Calcium & Magnesium boost for vibrant, strong plants Ultra-pure liquid formula for easy absorption Precise dosing: 2-5ml per gallon for tailored feeding Professional Grade Ultra Pure Cal-Mag Growing Fertilizer, 1/2 Pint (8 oz)

**Brand:** bloom city
**Price:** 231.41 DT
**Availability:** ✅ In Stock

## Summary

> 🌱 Elevate your garden game with every drop—because your plants deserve the best!

## Quick Answers

- **What is this?** Professional Grade Ultra Pure Cal-Mag Growing Fertilizer, 1/2 Pint (8 oz) by bloom city
- **How much does it cost?** 231.41 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/270508968-professional-grade-ultra-pure-cal-mag-growing-fertilizer-1-2)

## Best For

- bloom city enthusiasts

## Why This Product

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

## Key Features

- • **Nutrient Powerhouse:** Delivers essential calcium and magnesium to fortify stems and enhance leaf vibrancy, indoors or out.
- • **Rapid Plant Revival:** Users report noticeable plant health improvements within a week—don’t let deficiencies hold your garden back.
- • **Effortless Integration:** Simple 2-5ml per gallon dosing fits seamlessly into any watering routine—no guesswork, no mess.
- • **Versatile for All Growers:** Perfect for hydroponics, houseplants, or garden beds—adaptable to every plant care style and skill level.
- • **Organic & Professional Grade:** Premium, ultra-pure formula trusted by serious gardeners aiming for peak plant performance.

## Overview

Bloom City Professional Grade Ultra Pure Cal-Mag Fertilizer is an 8 oz liquid supplement delivering precise calcium and magnesium nutrition. Designed for easy mixing at 2-5ml per gallon, it supports strong stems and vibrant leaves across indoor, outdoor, and hydroponic plants. Trusted by gardeners for rapid nutrient correction and versatile use, this organic-grade formula integrates effortlessly into any plant care routine.

## Description

desertcart.com : Bloom City Professional Grade Ultra Pure Cal-Mag Growing Fertilizer, 1/2 Pint (8 oz) : Patio, Lawn & Garden

Review: Calcium magnesium fertilizer - I grow bell peppers and other types of peppers in my garden. Sometimes they need calcium and magnesium to fertilize them or they start getting the source fights on them. I decided to try this one to see if it would work. I use this and within a week, my plants perked up really well. The pepper started looking very nice and green and healthy. I’m very satisfied with this product. I would suggest this for anybody this fertilizer is good quality it’s effective and being organic makes it even better.
Review: Great for correcting nutrient deficiencies - This is the only general micronutrient supplement I ever buy. I first got it when my younger plants started showing signs of nutrient deficiencies outside of NPK nutrients. My plants showed signs of recovery after one watering and a few foliar applications. Some people might not need it, especially if they are growing in properly enriched soil, but I have water that's softened at a municipal level. As a result, some minerals have been removed from my water; this product helps restore those and add others that are good for all plant growth stages, from new plants to blooming plants. Use is simple. Just measure out however much I want to add to my 2-gallon can, dump it in, add water, and water my plants as usual. No worrying about presoaking anything or lots of stirring to mix in powders. (for simplicity, I use a different fertilizer bottle's cap to measure out ~8ml when filling my watering can) The bottle cap/lid and recommended measurements have changed from the previous bottle I bought. The ingredients list is the same, as well as the concentration percentages of the minerals. They also separate the use guidelines/directions differently between them. I'll only mention the amount differences. New: watering can: 1tsp (2.5-5ml)/gallon Hose end sprayer: 1tsp (5ml) approx 1:750 ratio Foliar spray: 2-4tsp (10-20ml)/gallon Old: Grow phase: 2-4ml/gallon Bloom phase: 3-5ml/gallon Sprayer instructions: 20-40ml/gallon Not sure why they changed the amounts, but it's helpful to know the ratio for using with a hose end sprayer. Overall, great value for money in my opinion.

## Features

- Easy Mixing Directions: Simply add 2-5ml per gallon of feedwater, then water your plants as you normally would. A straightforward addition to your plant care routine, suited for all types of plants.
- Nutrient-Focused Formula: This Cal Mag fertilizer contains calcium and magnesium that plants use for maintaining strong stems and vibrant leaves. Suitable for both indoor and outdoor use.
- Adaptable for Different Growers: Whether tending to houseplants, outdoor gardens, or hydroponic setups, this CalMag for plants fits into a variety of growing conditions and plant care styles.
- Supports Plant Nutrition: Many gardeners turn to Cal Mag for plants to help address nutrient needs, aiming to support consistent growth and leaf color, linked to calcium and magnesium intake.
- Suitable for Growers of Any Skill Level: From beginners to experienced gardeners, this Cal Mag fertilizer is easy to integrate into any plant care routine, providing essential nutrients in an accessible format.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08JHFG5GH |
| Best Sellers Rank | #3,624 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #142 in Garden Fertilizers |
| Brand | Bloom City |
| Date First Available | January 4, 2023 |
| Item Form | Liquid |
| Item Weight | 8 ounces |
| Liquid Volume | 0.5 Pints |
| Manufacturer | Bloom City |
| Number of Items | 1 |
| Package Dimensions | 6.26 x 1.93 x 1.85 inches |
| Specific Uses For Product | Organic |
| UPC | 841401125691 |
| Unit Count | 8 Ounce |

## Product Details

- **Brand:** Bloom City
- **Item Form:** Liquid
- **Item Weight:** 8 Ounces
- **Liquid Volume:** 0.5 Pints
- **Specific Uses For Product:** Organic

## Images

![Professional Grade Ultra Pure Cal-Mag Growing Fertilizer, 1/2 Pint (8 oz) - Image 1](https://m.media-amazon.com/images/I/61E0Mp9CLRL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Calcium magnesium fertilizer
*by M***Y on September 18, 2025*

I grow bell peppers and other types of peppers in my garden. Sometimes they need calcium and magnesium to fertilize them or they start getting the source fights on them. I decided to try this one to see if it would work. I use this and within a week, my plants perked up really well. The pepper started looking very nice and green and healthy. I’m very satisfied with this product. I would suggest this for anybody this fertilizer is good quality it’s effective and being organic makes it even better.

### ⭐⭐⭐⭐⭐ Great for correcting nutrient deficiencies
*by G***E on June 12, 2025*

This is the only general micronutrient supplement I ever buy. I first got it when my younger plants started showing signs of nutrient deficiencies outside of NPK nutrients. My plants showed signs of recovery after one watering and a few foliar applications. Some people might not need it, especially if they are growing in properly enriched soil, but I have water that's softened at a municipal level. As a result, some minerals have been removed from my water; this product helps restore those and add others that are good for all plant growth stages, from new plants to blooming plants. Use is simple. Just measure out however much I want to add to my 2-gallon can, dump it in, add water, and water my plants as usual. No worrying about presoaking anything or lots of stirring to mix in powders. (for simplicity, I use a different fertilizer bottle's cap to measure out ~8ml when filling my watering can) The bottle cap/lid and recommended measurements have changed from the previous bottle I bought. The ingredients list is the same, as well as the concentration percentages of the minerals. They also separate the use guidelines/directions differently between them. I'll only mention the amount differences. New: watering can: 1tsp (2.5-5ml)/gallon Hose end sprayer: 1tsp (5ml) approx 1:750 ratio Foliar spray: 2-4tsp (10-20ml)/gallon Old: Grow phase: 2-4ml/gallon Bloom phase: 3-5ml/gallon Sprayer instructions: 20-40ml/gallon Not sure why they changed the amounts, but it's helpful to know the ratio for using with a hose end sprayer. Overall, great value for money in my opinion.

### ⭐⭐⭐⭐⭐ Works as advertised
*by W***R on October 9, 2025*

I initially got this for my raised garden tomatoes. When I noticed my bell pepper plants in growbags were experiencing end rot, I used this on them. Probably 2 doses in a month. From that point forward, it cured the end rot in the new bells. Seemed to act quick and I haven't had the need to add anymore this season. This was great to have on hand. Would order again.

## Frequently Bought Together

- Bloom City Professional Grade Ultra Pure Cal-Mag Growing Fertilizer, 1/2 Pint (8 oz)
- Bloom City Organic Liquid Seaweed and Kelp Fertilizer Supplement, (8 oz) Concentrated Makes 45 Gallons
- Bloom City Liquid Silica Boost Fertilizer and Supplement, 1/2 Pint (8 oz) Concentrated Makes 45 Gallons

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.tn/products/270508968-professional-grade-ultra-pure-cal-mag-growing-fertilizer-1-2](https://www.desertcart.tn/products/270508968-professional-grade-ultra-pure-cal-mag-growing-fertilizer-1-2)

---

*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-01-22*