--- product_id: 48892108 title: "Bloom City Professional Grade Ultra Pure Cal-Mag Fertilizer, (1 Gallon)" brand: "bloom city" price: "¥26508" currency: JPY in_stock: true category: "Bloom City" url: https://www.desertcart.jp/products/48892108-bloom-city-professional-grade-ultra-pure-cal-mag-fertilizer-1 store_origin: JP region: Japan --- # Boosts Calcium & Magnesium Uptake Top #105 Garden Fertilizer 1 Gallon Ultra-Pure Liquid Bloom City Professional Grade Ultra Pure Cal-Mag Fertilizer, (1 Gallon) **Brand:** bloom city **Price:** ¥26508 **Availability:** ✅ In Stock ## Summary > 🌿 Elevate your garden game with ultra-pure Cal-Mag power! ## Quick Answers - **What is this?** Bloom City Professional Grade Ultra Pure Cal-Mag Fertilizer, (1 Gallon) by bloom city - **How much does it cost?** ¥26508 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/48892108-bloom-city-professional-grade-ultra-pure-cal-mag-fertilizer-1) ## 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 - • **Trusted & Proven:** Made in the USA with a 4.6-star rating from nearly 7,000 growers—join the elite growers’ club. - • **Deficiency Defense:** Effectively reduces blossom end rot and corrects nutrient imbalances for flawless harvests. - • **Pure Power for Peak Growth:** Ultra-pure Cal-Mag formula fuels vigorous plant development and resilience. - • **Precision Dosing for Every Stage:** Customizable mixing ratios ensure perfect nutrient delivery from vegetative to bloom phases. - • **Versatile for Soil & Hydroponics:** Optimized for both indoor gardens and advanced hydroponic systems—grow anywhere, anytime. ## Overview Bloom City Professional Grade Ultra Pure Cal-Mag Fertilizer is a 1-gallon liquid nutrient solution designed to enhance plant strength and growth by supplying essential calcium and magnesium. Suitable for both soil and hydroponic systems, it helps prevent blossom end rot and corrects nutrient deficiencies, supporting a wide range of plants including vegetables, houseplants, and turf. Highly rated and made in the USA, it offers precise dosing for all growth stages. ## Description desertcart.com : Bloom City Professional Grade Ultra Pure Cal-Mag Fertilizer, (1 Gallon) | 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 | B073ZP47ZN | | Best Sellers Rank | #2,931 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #105 in Garden Fertilizers | | Brand Name | Bloom City | | Coverage | Full | | Customer Reviews | 4.6 4.6 out of 5 stars (6,960) | | Item Form | Liquid | | Item Highlight | Helps Reduce Blossom End Rot, Corrects Deficiencies, Boost Calcium Uptake, Made for Hydro & Soil, Supports Tomatoes & Peppers | | Item Weight | 8 pounds | | Liquid Volume | 1 gallons | | Manufacturer | Bloom City | | Mixing Ratio | 2-4 mL per gallon (vegetative stage), 3-5 mL per gallon (bloom) | | Model Number | Cal-Mag UltraPure | Plus Micros | | Number of Items | 1 | | Number of Packs | 1 | | Part Number | BCALMAG1G | | Specific Uses For Product | Plant Growth | | Target Species | Houseplants, Greenhouse Plants, Edible Plants (fruits and veggies), Trees, Turf | | UPC | 841401125158 | | Unit Count | 128 Ounce | ## Product Details - **Brand:** Bloom City - **Item Form:** Liquid - **Item Weight:** 8 pounds - **Liquid Volume:** 1 gallons - **Specific Uses For Product:** Plant Growth ## Images ![Bloom City Professional Grade Ultra Pure Cal-Mag Fertilizer, (1 Gallon) - Image 1](https://m.media-amazon.com/images/I/41QrVmjijEL.jpg) ![Bloom City Professional Grade Ultra Pure Cal-Mag Fertilizer, (1 Gallon) - Image 2](https://m.media-amazon.com/images/I/51x4nLStD8L.jpg) ![Bloom City Professional Grade Ultra Pure Cal-Mag Fertilizer, (1 Gallon) - Image 3](https://m.media-amazon.com/images/I/61C7xgfiKgL.jpg) ![Bloom City Professional Grade Ultra Pure Cal-Mag Fertilizer, (1 Gallon) - Image 4](https://m.media-amazon.com/images/I/511KJiuFmoL.jpg) ![Bloom City Professional Grade Ultra Pure Cal-Mag Fertilizer, (1 Gallon) - Image 5](https://m.media-amazon.com/images/I/51w8ctgVZEL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: Is there nitrogen in this? It would be helpful for the seller to post the bottle back side label.** A: Hey there, good idea on posting the labels, adding that to my to-do list! To answer your question, yes there is Nitrogen. Here is the guaranteed analysis of nutrient content on our Cal-Mag. Total Nitrogen 2%, 2% Nitrate Nitrogen, Calcium 2%, Magnesium 0.6%, Boron .002%, Copper .003%, iron .004%, Manganese .004%, Zinc .004%. Derived from: Calcium Nitrate, Magnesium Nitrate, Boric Acid, Copper Sulfate, Ferric Sulfate, Manganese Sulfate, Zinc Sulfate. Hope that helps! James - Bloom City Crew **Q: Site says it is compatible with all growth mediums, but bottle says for hydroponic use ONLY. Which is it?** A: That terminology on the bottle is unfortunately a labeling requirement placed on us by regulators. It is compatible with all growing mediums, including soil, cocoa coir, peat, hydroponic systems, etc. Thanks, James - Bloom City Crew **Q: Can this be mixed with epsom salt for additional magnesium as a foliar spray or added as a root drench?** A: Hi, Great question. It can be added to epsom salt in a water solution, however we suggest you try this Cal-Mag first on the plants - its probably more than enough magnesium. We use highly bio-available mineral forms and add organic acids to the product to increase uptake. Its also great as both a foliar spray and a root drench! Let us know how the plants grow! **Q: What would be the salt in ppm per dose added to ro or distilled water?** A: Hi, thanks for the question! The PPM added would be about 120 for the low dose of 2ml per gallon, and 240 for the high dose of 4ml per gallon. Let us know if you have any other questions! James - Bloom City Crew ## Frequently Bought Together - Bloom City Professional Grade Ultra Pure Cal-Mag Growing Fertilizer,Gallon (128 oz) - Bloom City Organic Liquid Seaweed and Kelp Fertilizer Supplement (128 oz) Concentrated Makes 750 Gallons - Bloom City Liquid Silica Boost Fertilizer and Supplement, Gallon (128 oz) Concentrated Makes 750 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.jp/products/48892108-bloom-city-professional-grade-ultra-pure-cal-mag-fertilizer-1](https://www.desertcart.jp/products/48892108-bloom-city-professional-grade-ultra-pure-cal-mag-fertilizer-1) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-09-18*