---
product_id: 270508968
title: "Bloom City Professional Grade Ultra Pure Cal-Mag Growing Fertilizer, 1/2 Pint (8 oz)"
brand: "bloom city"
price: "21794 Ft"
currency: HUF
in_stock: true
reviews_count: 8
category: "Bloom City"
url: https://www.desertcart.hu/products/270508968-bloom-city-professional-grade-ultra-pure-cal-mag-growing-fertilizer
store_origin: HU
region: Hungary
---

# Calcium & magnesium boost Ultra-pure liquid formula Precise 2-5ml/gallon dosing Bloom City Professional Grade Ultra Pure Cal-Mag Growing Fertilizer, 1/2 Pint (8 oz)

**Brand:** bloom city
**Price:** 21794 Ft
**Availability:** ✅ In Stock

## Summary

> 🌱 Elevate your garden game with the pure power of Cal-Mag!

## Quick Answers

- **What is this?** Bloom City Professional Grade Ultra Pure Cal-Mag Growing Fertilizer, 1/2 Pint (8 oz) by bloom city
- **How much does it cost?** 21794 Ft with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hu](https://www.desertcart.hu/products/270508968-bloom-city-professional-grade-ultra-pure-cal-mag-growing-fertilizer)

## 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

- • **Effortless Nutrient Boost:** Just 2-5ml per gallon for vibrant, healthy plants without the guesswork.
- • **Professional Grade Purity:** Ultra-pure liquid formula ensures maximum absorption and no residue buildup.
- • **Versatile for Every Grower:** Perfect for indoor, outdoor, and hydroponic setups—your all-in-one plant ally.
- • **Beginner Friendly, Expert Approved:** Simple mixing and application make it ideal for all skill levels, from hobbyists to pros.
- • **Supports Strong Stems & Lush Leaves:** Calcium and magnesium work together to enhance plant structure and color.

## Overview

Bloom City Professional Grade Ultra Pure Cal-Mag Fertilizer delivers a precise, easy-to-use liquid formula packed with essential calcium and magnesium. Designed for all plant types and growing methods, it supports strong stems, vibrant leaves, and consistent growth. Trusted by thousands with a 4.6-star rating, this 8 oz bottle is your go-to solution for correcting nutrient deficiencies and boosting plant health effortlessly.

## 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 | #4,935 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #172 in Garden Fertilizers |
| Brand | Bloom City |
| Brand Name | Bloom City |
| Coverage | Full |
| Customer Reviews | 4.6 out of 5 stars 6,774 Reviews |
| Item Form | Liquid |
| Item Weight | 8 Ounces |
| Liquid Volume | 0.5 Pints |
| Manufacturer | Bloom City |
| Mixing Ratio | 2-5 mL per gallon |
| Specific Uses For Product | Organic |
| Target Species | plants |
| 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

![Bloom City Professional Grade Ultra Pure Cal-Mag Growing Fertilizer, 1/2 Pint (8 oz) - Image 1](https://m.media-amazon.com/images/I/61E0Mp9CLRL.jpg)
![Bloom City Professional Grade Ultra Pure Cal-Mag Growing Fertilizer, 1/2 Pint (8 oz) - Image 2](https://m.media-amazon.com/images/I/812lYWScaDL.jpg)
![Bloom City Professional Grade Ultra Pure Cal-Mag Growing Fertilizer, 1/2 Pint (8 oz) - Image 3](https://m.media-amazon.com/images/I/816+CxuUnIL.jpg)
![Bloom City Professional Grade Ultra Pure Cal-Mag Growing Fertilizer, 1/2 Pint (8 oz) - Image 4](https://m.media-amazon.com/images/I/819b51Y6x6L.jpg)
![Bloom City Professional Grade Ultra Pure Cal-Mag Growing Fertilizer, 1/2 Pint (8 oz) - Image 5](https://m.media-amazon.com/images/I/81FASSzoi9L.jpg)

## Available Options

This product comes in different **Size** options.

## 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

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*Product available on Desertcart Hungary*
*Store origin: HU*
*Last updated: 2026-01-25*