--- product_id: 68507987 title: "CalMag & Iron, Liquid Plant Nutrient Fertilizer, 1 Gallon" brand: "humboldts secret" price: "₨3484" currency: SCR in_stock: true reviews_count: 8 category: "Humboldts Secret" url: https://www.desertcart.sc/products/68507987-calmag-and-iron-liquid-plant-nutrient-fertilizer-1-gallon store_origin: SC region: Seychelles --- # Fast-acting nutrient recovery Calcium, Magnesium & Chelated Iron blend 128 fl oz liquid volume CalMag & Iron, Liquid Plant Nutrient Fertilizer, 1 Gallon **Brand:** humboldts secret **Price:** ₨3484 **Availability:** ✅ In Stock ## Summary > 🌱 Unlock your garden’s secret weapon for unstoppable growth! ## Quick Answers - **What is this?** CalMag & Iron, Liquid Plant Nutrient Fertilizer, 1 Gallon by humboldts secret - **How much does it cost?** ₨3484 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sc](https://www.desertcart.sc/products/68507987-calmag-and-iron-liquid-plant-nutrient-fertilizer-1-gallon) ## Best For - humboldts secret enthusiasts ## Why This Product - Trusted humboldts secret brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Strengthens & Fortifies:** Boosts stem strength, leaf color, and fruit quality at every growth stage - • **Rapid Nutrient Absorption:** Maximizes uptake efficiency for lush growth and vibrant blooms - • **Power-Packed 3-in-1 Formula:** Calcium, Magnesium & Chelated Iron for unbeatable plant health - • **Versatile Garden Compatibility:** Perfect for soil, hydroponics, coco coir & RO water setups - • **Prevents Deficiencies & Disorders:** Stops blossom end rot and nutrient imbalances before they start ## Overview Humboldts Secret CalMag & Iron is a premium 1-gallon liquid fertilizer delivering a balanced blend of calcium, magnesium, and chelated iron. Designed for rapid absorption and versatile use across soil, hydroponics, coco coir, and RO water systems, it strengthens plant structure, enhances photosynthesis, and prevents common nutrient deficiencies—ensuring vigorous growth, vibrant foliage, and abundant fruiting for both indoor and outdoor gardens. ## Description desertcart.com : Humboldts Secret CalMag & Iron, Liquid Plant Nutrient Fertilizer, 1 Gallon | Calcium, Magnesium & Chelated Iron Formula, Prevents Nutrient Deficiencies, For Soil, Coco, Hydroponics & RO Water, Easy Mix : Patio, Lawn & Garden Review: This stuff WORKS!! - This stuff is great! My pepper plants were turning yellow and had blossom end rot so they were getting a lottlw rotten hole before they were even ready to pick. I read online that several ppl recommended this for that problem. It was like a miracle, I used it twice and my plants turned green again and the peppers started growing perfectly! I kept using them as recommended and got so many beautiful peppers from my plant all summer! Life saver! Plus it is so concentrated, you only use about a cap full with a gallon of water so it will last FOREVER! Review: Please help me with my light , my Tatu 1000W LED Grow Light - Like ## Features - Packaging Update: You may receive previous or updated packaging during our transition. Same formula, same performance. Strength for Every Stage - Humboldts Secret supplement with cal mag for plants delivers calcium, magnesium, and chelated iron to prevent deficiencies. It fortifies stems, improves leaf color, and supports flowering and fruiting plants for vigorous, healthy growth in any type of garden. - Fast-Acting Plant Recovery: Our balanced formula with calmag and chelated iron targets issues caused by nutrient imbalances, helping plants recover quickly. It boosts photosynthesis, nutrient transport, and root strength in vegetables, flowers, and herbs grown indoors or outdoors. - Maximum Absorption Power: Using our cal-mag for plants blend with added iron improves uptake efficiency, ensuring these essential minerals are fully utilized. It supports lush vegetative growth and abundant blooms, delivering consistent results for home or commercial growers. - Reliable Across All Setups: Humboldts Secret cal mag fertilizer with iron works in hydroponics, soil, and container gardens. It strengthens plant structure, enhances fruit quality, and ensures balanced nutrition in indoor and outdoor systems for dependable, healthy harvests. - Focused on Fruiting Success: Our formula with calcium and magnesium for plants plus chelated iron benefits crops in coco coir or reverse osmosis water. It helps prevent blossom end rot, promotes firm fruit set, and improves nutrient absorption for strong, productive plants in challenging conditions. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01GB23TD0 | | Application Method | soil drench or foliar spray | | Best Sellers Rank | #25,301 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #589 in Garden Fertilizers | | Brand | Humboldts Secret | | Brand Name | Humboldts Secret | | Coverage | Medium | | Customer Reviews | 4.6 out of 5 stars 2,094 Reviews | | Global Trade Identification Number | 00648260730406 | | Item Form | Liquid | | Item Highlight | Calcium, Magnesium & Chelated Iron Formula, Prevents Nutrient Deficiencies, For Soil, Coco, Hydroponics & RO Water, Easy Mix | | Liquid Volume | 128 fluid ounces | | Manufacturer | Humboldts Secret | | Mixing Ratio | 2-5 ml/gallon | | Model Number | CalMag & Iron | | Number of Packs | 1 | | Part Number | TUEEQE-06 | | Specific Uses For Product | Hydroponic | | Target Species | flowering plants | | UPC | 648260730406 | | Unit Count | 128 Fluid Ounces | ## Product Details - **Brand:** Humboldts Secret - **Global Trade Identification Number:** 00648260730406 - **Item Form:** Liquid - **Liquid Volume:** 128 fluid ounces - **Specific Uses For Product:** Hydroponic ## Images ![CalMag & Iron, Liquid Plant Nutrient Fertilizer, 1 Gallon - Image 1](https://m.media-amazon.com/images/I/71E5ugjm48L.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ This stuff WORKS!! *by J***7 on January 30, 2026* This stuff is great! My pepper plants were turning yellow and had blossom end rot so they were getting a lottlw rotten hole before they were even ready to pick. I read online that several ppl recommended this for that problem. It was like a miracle, I used it twice and my plants turned green again and the peppers started growing perfectly! I kept using them as recommended and got so many beautiful peppers from my plant all summer! Life saver! Plus it is so concentrated, you only use about a cap full with a gallon of water so it will last FOREVER! ### ⭐⭐⭐⭐⭐ Please help me with my light , my Tatu 1000W LED Grow Light *by N***P on August 31, 2026* Like ### ⭐⭐⭐⭐⭐ Works wonders *by G***A on October 2, 2026* Works wonders on all plants even the cactus plants the size was perfect but I will be looking for larger size for all my other plants --- ## 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.sc/products/68507987-calmag-and-iron-liquid-plant-nutrient-fertilizer-1-gallon](https://www.desertcart.sc/products/68507987-calmag-and-iron-liquid-plant-nutrient-fertilizer-1-gallon) --- *Product available on Desertcart Seychelles* *Store origin: SC* *Last updated: 2026-10-25*