--- product_id: 270508968 title: "Bloom City Professional Grade Ultra Pure Cal-Mag Fertilizer, (8 oz)" brand: "bloom city" price: "¥4265" currency: JPY in_stock: true reviews_count: 8 url: https://www.desertcart.jp/products/270508968-bloom-city-professional-grade-ultra-pure-cal-mag-fertilizer-8 store_origin: JP region: Japan --- # Supports both soil & hydroponics Ultra pure liquid formula Boosts nutrient uptake efficiency Bloom City Professional Grade Ultra Pure Cal-Mag Fertilizer, (8 oz) **Brand:** bloom city **Price:** ¥4265 **Availability:** ✅ In Stock ## Summary > 🌿 Elevate your garden game with pure, professional-grade Cal-Mag magic! ## Quick Answers - **What is this?** Bloom City Professional Grade Ultra Pure Cal-Mag Fertilizer, (8 oz) by bloom city - **How much does it cost?** ¥4265 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/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 - • **Dual-Mode Application:** Perfect for watering in or foliar spray—flexible feeding options - • **Hydro & Soil Compatible:** Seamlessly supports indoor gardens and hydroponic systems alike - • **Prevents Blossom End Rot:** Keeps your tomatoes and peppers thriving with fewer defects - • **Clean Formula, No Clogging:** Ultra pure mix that won’t build up or block your irrigation system - • **Calcium & Magnesium Powerhouse:** Essential nutrients for robust, healthy plant growth ## Overview Bloom City Professional Grade Ultra Pure Cal-Mag Fertilizer (8 oz) delivers a potent blend of calcium and magnesium designed to enhance plant strength, prevent common deficiencies like blossom end rot, and improve nutrient uptake. Ideal for both soil and hydroponic systems, this ultra-pure liquid formula supports steady, vigorous growth for vegetables, houseplants, and garden crops. Trusted by thousands with a 4.7-star rating, it offers a clean, clog-free solution made in the USA to keep your plants thriving season after season. ## Description Use in watering can for precision nutrition. Mix 2-4 mL per gallon of water during grow phase, mix 3-5 mL per gallon of water during bloom phase. Use with every watering. Use with hose end sprayer for larger areas. Use a mixing ratio of 1:100 or 1:200, apply 1-2 times monthly. Use as a foliar spray for rapid nutrient uptake. Mix with water at 4-8 tsp. per gallon for all stages of growth, apply once weekly. Bloom City gives the power of clean, regenerative gardening to the home grower with full-spectrum plant nutrition for bountiful yields in any growing environment. Our emphasis on environmentally responsible production methods with natural & sustainable input sourcing makes for more bio-available nutrient outputs & safer, cleaner gardens. Bloom City's nutrient systems are everything you need to grow lush, beautiful gardens without harsh chemical fertilizers. Harness the power of regenerative growing practices to create living soil & vibrant plants. We're a small team of botanists & plant chemists dedicated to creating healthy, sustainable nutrients for your garden. Bloom City's formulations are better for plants, people, and the planet. Our small team of botanists & plant chemists offer conscientious growers a clean and simple alternative to Big Ag fertilizers. We created a line of Plant Nutrients supplements that provide essential nutrients and organic compounds plants need to grow strong. Big fertilizer firms use harmful, outdated chemicals that are bad for people and the planet. Bloom City's nutrient systems offer craft growers a safe solution for large, clean blooms. Bloom City's unique formulas and probiotics generate high-quality yields without the low-quality, filler ingredients of other brands. Our sustainable fertilizers use many organic ingredients like wild Atlantic kelp, fish bone meal from the Pacific Northwest, and solar-evaporated potassium rather than industrially mined, all sourced in the USA. From houseplants to hydroponics, our nutrient systems have what you need for beautiful, healthy growing. ## 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 | |---------------|-------| | Application Method | watered-in and foliar spray | | Asin | B08JHFG5GH | | Best Sellers Rank | #5,202 in Patio, Lawn & Garden (See Top 100 in Patio, Lawn & Garden) #128 in Garden Fertilizers | | Brand | Bloom City | | Coverage | Full | | Customer Reviews | 4.6 4.6 out of 5 stars (6,998) 4.6 out of 5 stars | | 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 ounces | | Liquid Volume | 8 fluid ounces | | Manufacturer | Bloom City | | Mixing Ratio | 2-5 mL per gallon | | Number Of Items | 1 | | Number Of Packs | 36 | | Part Number | BCALMAG8OZ | | Specific Uses For Product | Organic | | Target Species | plants | | Unit Count | 8 Ounce | | Upc | 841401125691 | ## 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) - Image 1](https://m.media-amazon.com/images/I/61E0Mp9CLRL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Best plant fertilizer *by on Reviewed in the United States March 26, 2026* I’ve been using the Bloom City Professional Grade Ultra Pure Cal-Mag (32 oz) for my plants, and I’m very impressed with the results. It’s made a noticeable difference in overall plant health—especially with preventing calcium and magnesium deficiencies that can show up as yellowing leaves or weak growth.The formula is clean and easy to mix, and a little goes a long way. I’ve used it with both soil and hydro setups, and it works great across the board. My plants look greener, stronger, and more vibrant since adding this to my routine.Another big plus is that it doesn’t cause buildup or clogging in my system, which I’ve had issues with in the past when using other brands. If you’re growing vegetables, houseplants, or anything that needs that extra nutrient boost, this is definitely worth trying. Reliable quality and consistent results. I'll be buying again! ### ⭐⭐⭐⭐⭐ Great product! *by on Reviewed in the United States August 4, 2026* Did wonders for my plants! Will definitely purchase again. ### ⭐⭐⭐⭐⭐ Plants looooove it *by on Reviewed in the United States October 8, 2026* Plants love the cal mag! ## 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.jp/products/270508968-bloom-city-professional-grade-ultra-pure-cal-mag-fertilizer-8](https://www.desertcart.jp/products/270508968-bloom-city-professional-grade-ultra-pure-cal-mag-fertilizer-8) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-11-02*