---
product_id: 270508968
title: "Bloom City Professional Grade Ultra Pure Cal-Mag Fertilizer, (8 oz) | Helps Reduce Blossom End Rot, Corrects Deficiencies, Boost Calcium Uptake, Made for Hydro & Soil, Supports Tomatoes & Peppers"
brand: "bloom city"
price: "$34.75"
currency: USD
in_stock: true
category: "Bloom City"
url: https://www.desertcart.us/products/270508968-bloom-city-professional-grade-ultra-pure-cal-mag-fertilizer-8
store_origin: US
region: United States of America
---

# Optimized for soil & hydroponics Reduces blossom end rot in tomatoes & peppers 8 oz ultra-pure liquid formula Bloom City Professional Grade Ultra Pure Cal-Mag Fertilizer, (8 oz) | Helps Reduce Blossom End Rot, Corrects Deficiencies, Boost Calcium Uptake, Made for Hydro & Soil, Supports Tomatoes & Peppers

**Brand:** bloom city
**Price:** $34.75
**Availability:** ✅ In Stock

## Summary

> 🌿 Grow like a pro, harvest like a boss!

## Quick Answers

- **What is this?** Bloom City Professional Grade Ultra Pure Cal-Mag Fertilizer, (8 oz) | Helps Reduce Blossom End Rot, Corrects Deficiencies, Boost Calcium Uptake, Made for Hydro & Soil, Supports Tomatoes & Peppers by bloom city
- **How much does it cost?** $34.75 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/270508968-bloom-city-professional-grade-ultra-pure-cal-mag-fertilizer-8)

## 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

- • **Deficiency Defense:** Effectively corrects calcium and magnesium deficiencies to prevent blossom end rot.
- • **Dual-Mode Growth Booster:** Perfectly formulated for both soil and hydroponic systems—grow anywhere, anytime.
- • **Pure Power in Every Drop:** Ultra-pure Cal-Mag liquid ensures precise nutrient delivery for peak plant health.
- • **Trusted American Quality:** Proudly made in the USA with a 4.7-star rating from over 6,900 happy growers.
- • **Stronger Plants, Superior Yields:** Supports sturdy stems and vibrant fruit development for your garden’s best season yet.

## Overview

Bloom City’s Professional Grade Ultra Pure Cal-Mag Fertilizer is an 8 oz liquid formula designed to boost calcium and magnesium uptake, reduce blossom end rot, and correct nutrient deficiencies. Ideal for both soil and hydroponic systems, it supports strong growth and healthy yields in tomatoes, peppers, and other plants. Made in the USA and highly rated by thousands of gardeners, it’s the go-to solution for professional-grade plant nutrition.

## Description

desertcart.com : Bloom City Professional Grade Ultra Pure Cal-Mag Fertilizer, (8 oz) | Helps Reduce Blossom End Rot, Corrects Deficiencies, Boost Calcium Uptake, Made for Hydro & Soil, Supports Tomatoes & Peppers : Patio, Lawn & Garden

## Features

- Calcium & Magnesium Growing Support – Formulated to supply essential nutrients for active plant growth.
- Supports Plant Strength & Development – Helps encourage sturdy structure and steady growth.
- Improves Nutrient Uptake Efficiency – Supports balanced feeding and overall plant performance.
- Ideal for Soil & Hydroponic Systems – Suitable for indoor plants, gardens, and hydroponic growing.
- Made in USA

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08JHFG5GH |
| Best Sellers Rank | #710 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #30 in Garden Fertilizers |
| Brand Name | Bloom City |
| Coverage | Full |
| Customer Reviews | 4.7 4.7 out of 5 stars (6,905) |
| Item Form | Liquid |
| Item Weight | 8 ounces |
| Liquid Volume | 8 fluid ounces |
| Manufacturer | Bloom City |
| Mixing Ratio | 2-5 mL per gallon |
| Number of Items | 1 |
| Part Number | BCALMAG8OZ |
| 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:** 8 fluid ounces
- **Specific Uses For Product:** Organic

## Images

![Bloom City Professional Grade Ultra Pure Cal-Mag Fertilizer, (8 oz) | Helps Reduce Blossom End Rot, Corrects Deficiencies, Boost Calcium Uptake, Made for Hydro & Soil, Supports Tomatoes & Peppers - Image 1](https://m.media-amazon.com/images/I/61E0Mp9CLRL.jpg)

## Available Options

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

## 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

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**Shop now:** [https://www.desertcart.us/products/270508968-bloom-city-professional-grade-ultra-pure-cal-mag-fertilizer-8](https://www.desertcart.us/products/270508968-bloom-city-professional-grade-ultra-pure-cal-mag-fertilizer-8)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-08-15*