--- product_id: 638674189 title: "VIVOSUN Cal+Mag+Iron (2-0-0), Calcium, Magnesium & Iron Supplement, Liquid Nutrient Fertilizer for All Plants, Concentrated Plant Food for Soil/Soilless Cultivation, Hydroponics, 1 Quart" brand: "vivosun" price: "$88.72" currency: USD in_stock: true reviews_count: 8 category: "Vivosun" url: https://www.desertcart.us/products/638674189-vivosun-cal-mag-iron-2-0-0-calcium-magnesium-iron store_origin: US region: United States of America --- # 56 sq ft coverage per quart 100% water-soluble for all mediums 2-0-0 NPK ratio for targeted nutrition VIVOSUN Cal+Mag+Iron (2-0-0), Calcium, Magnesium & Iron Supplement, Liquid Nutrient Fertilizer for All Plants, Concentrated Plant Food for Soil/Soilless Cultivation, Hydroponics, 1 Quart **Brand:** vivosun **Price:** $88.72 **Availability:** ✅ In Stock ## Summary > 🌿 Unlock your plants’ full potential with every drop! ## Quick Answers - **What is this?** VIVOSUN Cal+Mag+Iron (2-0-0), Calcium, Magnesium & Iron Supplement, Liquid Nutrient Fertilizer for All Plants, Concentrated Plant Food for Soil/Soilless Cultivation, Hydroponics, 1 Quart by vivosun - **How much does it cost?** $88.72 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/638674189-vivosun-cal-mag-iron-2-0-0-calcium-magnesium-iron) ## Best For - vivosun enthusiasts ## Why This Product - Trusted vivosun brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Concentrated & Easy to Use:** Simple dosing for all growth stages—customize your feed for optimal results - • **Triple Power Nutrient Boost:** Calcium, Magnesium & Iron in one potent formula to prevent common plant deficiencies - • **Maximized Nutrient Absorption:** Enhances uptake of other nutrients for healthier, faster-growing plants - • **Universal Growing Compatibility:** Perfect for soil, hydroponics, coco coir, and aeroponics—grow anywhere, anytime - • **Proven Results & Trusted Quality:** Highly rated with 4.6 stars and praised for revitalizing tomatoes, peppers, and more ## Overview VIVOSUN Cal+Mag+Iron (2-0-0) is a concentrated liquid fertilizer delivering essential calcium, magnesium, and iron to prevent nutrient deficiencies and promote robust plant growth. Fully water-soluble and compatible with all growing mediums including hydroponics and soil, it enhances nutrient uptake and supports healthy photosynthesis and fruit development. Ideal for indoor and outdoor plants, this 1-quart formula covers up to 56 square feet and is trusted by gardeners for consistent, vibrant results. ## Description Product description What are the benefits of Cal+Mag+Iron? Cal+Mag+Iron provides a precise balance of calcium, magnesium, and iron, specifically formulated to address potential deficiencies. What are the benefits of Cal+Mag+Iron? Cal+Mag+Iron provides a precise balance of calcium, magnesium, and iron, specifically formulated to address potential deficiencies. Can Cal+Mag+Iron be used with other additives? Yes, Cal+Mag+Iron can be used in combination with other nutrient systems. Can Cal+Mag+Iron be used with other additives? Yes, Cal+Mag+Iron can be used in combination with other nutrient systems. Why do I need this if I'm using coco substrate? Coco coir naturally absorbs calcium and magnesium, making them unavailable to plants. Using Vivosun Cal+Mag+Iron prevents these deficiencies. Why do I need this if I'm using coco substrate? Coco coir naturally absorbs calcium and magnesium, making them unavailable to plants. Using Vivosun Cal+Mag+Iron prevents these deficiencies. Should Cal+Mag+Iron be used on the soil or sprayed on the plant? Cal+Mag+Iron can be applied both as a soil drench and as a foliar spray. Should Cal+Mag+Iron be used on the soil or sprayed on the plant? Cal+Mag+Iron can be applied both as a soil drench and as a foliar spray. What kinds of growing mediums can Cal+Mag+Iron be used in? Vivosun Nutrients Cal+Mag+Iron is suitable for all growing mediums, including potting soil, hydroponics, aquaponics, and coco coir cultivation. What kinds of growing mediums can Cal+Mag+Iron be used in? Vivosun Nutrients Cal+Mag+Iron is suitable for all growing mediums, including potting soil, hydroponics, aquaponics, and coco coir cultivation. Vivosun Nutrient Regime BASE A(4-0-1)&B(1-4-2) NutriBoost 0-0-1 Bloom Juice 0-6-4 Cal+Mag+Iron 2-0-0 pH Up & pH Down Kit ## Features - Prevent & Correct Deficiencies: Nourish your plants with essential nutrients like calcium, magnesium, and iron to prevent and correct common deficiencies such as blossom end rot, interveinal chlorosis, stunted growth, leaf curling or cupping, and leaf brittleness - Premium Ingredients: This well-balanced formula is enriched with calcium, magnesium, iron, and nitrogen - all key elements for efficient photosynthesis, robust growth, and fruit development; It is formulated to optimize plant growth and maximize yields - Compatible With All Growing Mediums: This 100% water-soluble liquid fertilizer is ideal for hydroponics, aeroponics, coco coir, DWC (deep water culture), soil, and any other growing medium or system; It is especially suitable for coco coir and reverse osmosis water cultivation, where calcium and magnesium deficiencies are common - Compatible with Other Nutrients: This versatile additive is fully compatible with other nutrient systems; It can also enhance the plants’ ability to absorb other essential nutrients, optimizing overall nutrient uptake and efficiency - Easy to Use: This concentrated formula is easy to use at all growth stages for all indoor and outdoor plants; It can be used as a standalone additive or combined with others; Experiment with the dosage to find the optimal amount for your specific setup and plant ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0CT8BGPYP | | Best Sellers Rank | #48,846 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #1,335 in Garden Fertilizers | | Brand Name | VIVOSUN | | Coverage | 56 square feet | | Customer Reviews | 4.6 4.6 out of 5 stars (100) | | Included Components | Cal | | Item Form | Cal | | Item Weight | 2.56 Pounds | | Liquid Volume | 1 Quarts | | Manufacturer | VIVOSUN | | Model Number | VSN-CAMGIR32 | | Specific Uses For Product | Plant Growth | | Target Species | all plants | | Unit Count | 32.0 Fluid Ounces | ## Product Details - **Brand:** VIVOSUN - **Item Form:** Cal - **Item Weight:** 2.56 Pounds - **Liquid Volume:** 1 Quarts - **Specific Uses For Product:** Plant Growth ## Images ![VIVOSUN Cal+Mag+Iron (2-0-0), Calcium, Magnesium & Iron Supplement, Liquid Nutrient Fertilizer for All Plants, Concentrated Plant Food for Soil/Soilless Cultivation, Hydroponics, 1 Quart - Image 1](https://m.media-amazon.com/images/I/51UP71ysrTL.jpg) ![VIVOSUN Cal+Mag+Iron (2-0-0), Calcium, Magnesium & Iron Supplement, Liquid Nutrient Fertilizer for All Plants, Concentrated Plant Food for Soil/Soilless Cultivation, Hydroponics, 1 Quart - Image 2](https://m.media-amazon.com/images/I/81afnwkpDHL.jpg) ![VIVOSUN Cal+Mag+Iron (2-0-0), Calcium, Magnesium & Iron Supplement, Liquid Nutrient Fertilizer for All Plants, Concentrated Plant Food for Soil/Soilless Cultivation, Hydroponics, 1 Quart - Image 3](https://m.media-amazon.com/images/I/81EbPI7wRaL.jpg) ![VIVOSUN Cal+Mag+Iron (2-0-0), Calcium, Magnesium & Iron Supplement, Liquid Nutrient Fertilizer for All Plants, Concentrated Plant Food for Soil/Soilless Cultivation, Hydroponics, 1 Quart - Image 4](https://m.media-amazon.com/images/I/81GNBMJVeeL.jpg) ![VIVOSUN Cal+Mag+Iron (2-0-0), Calcium, Magnesium & Iron Supplement, Liquid Nutrient Fertilizer for All Plants, Concentrated Plant Food for Soil/Soilless Cultivation, Hydroponics, 1 Quart - Image 5](https://m.media-amazon.com/images/I/81kEBBIKa-L.jpg) ## Questions & Answers **Q: What are the benefits of Cal+Mag+Iron?** A: Cal+Mag+Iron provides a precise balance of calcium, magnesium, and iron, specifically formulated to address potential deficiencies. **Q: Can Cal+Mag+Iron be used with other additives?** A: Yes, Cal+Mag+Iron can be used in combination with other nutrient systems. **Q: Why do I need this if I'm using coco substrate?** A: Coco coir naturally absorbs calcium and magnesium, making them unavailable to plants. Using Vivosun Cal+Mag+Iron prevents these deficiencies. **Q: Should Cal+Mag+Iron be used on the soil or sprayed on the plant?** A: Cal+Mag+Iron can be applied both as a soil drench and as a foliar spray. **Q: What kinds of growing mediums can Cal+Mag+Iron be used in?** A: Vivosun Nutrients Cal+Mag+Iron is suitable for all growing mediums, including potting soil, hydroponics, aquaponics, and coco coir cultivation. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by J***E on January 29, 2026* ### ⭐⭐⭐⭐⭐ Review *by B***T on March 4, 2026* ### ⭐⭐⭐⭐⭐ Review *by M***L on April 21, 2026* ## Frequently Bought Together - VIVOSUN Cal+Mag+Iron (2-0-0), Calcium, Magnesium & Iron Supplement, Liquid Nutrient Fertilizer for All Plants, Concentrated Plant Food for Soil/Soilless Cultivation, Hydroponics, 1 Quart - VIVOSUN Plant Food Nutrients Base A(4-0-1) & B(1-4-2) Bundle, All Purpose Liquid Fertilizer, Hydroponic Plant Food Supports Vegetative and Flowering Stages for Outdoor & Indoor Plants, Set of Quarts - VIVOSUN Seaweed and Kelp Fertilizer, Concentrated Plant Additive NutriBoost (0-0-1), All-Purpose Liquid Food for All Growing Stages, for Trees, Vegetables, Flowers, Fruits, Lawn, 32 Ounces/1 Quart --- ## 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.us/products/638674189-vivosun-cal-mag-iron-2-0-0-calcium-magnesium-iron](https://www.desertcart.us/products/638674189-vivosun-cal-mag-iron-2-0-0-calcium-magnesium-iron) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-05-13*