--- product_id: 41762991 title: "MasterBlend 4-18-38 Tomato & Vegetable Fertilizer - Bulk 1, 5 or 25 Pounds (5 Pounds)" brand: "masterblend" price: "₩110779" currency: KRW in_stock: true category: "Master Blend" url: https://www.desertcart.kr/products/41762991-masterblend-4-18-38-tomato-and-vegetable-fertilizer-bulk-1 store_origin: KR region: South Korea --- # 4-18-38 NPK ratio for optimal fruiting 100% water soluble for fast absorption Available in bulk: 1, 5, or 25 lbs MasterBlend 4-18-38 Tomato & Vegetable Fertilizer - Bulk 1, 5 or 25 Pounds (5 Pounds) **Brand:** masterblend **Price:** ₩110779 **Availability:** ✅ In Stock ## Summary > 🌿 Grow like a pro with MasterBlend – your secret weapon for next-level harvests! ## Quick Answers - **What is this?** MasterBlend 4-18-38 Tomato & Vegetable Fertilizer - Bulk 1, 5 or 25 Pounds (5 Pounds) by masterblend - **How much does it cost?** ₩110779 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/41762991-masterblend-4-18-38-tomato-and-vegetable-fertilizer-bulk-1) ## Best For - masterblend enthusiasts ## Why This Product - Trusted masterblend brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Bulk Buy Advantage:** Flexible packaging options to fit your garden size and budget - • **Ultra Soluble Power:** Completely water soluble for rapid nutrient uptake and growth - • **Hydroponic & Soil Ready:** Versatile use for both soil gardens and hydroponic systems - • **Pro-Recommended Formula:** Trusted by commercial growers with 4.7-star rating and proven results - • **Precision Nutrient Boost:** Tailored 4-18-38 formula maximizes tomato & vegetable yield ## Overview MasterBlend 4-18-38 Tomato & Vegetable Fertilizer is a professional-grade, water-soluble powder designed to enhance fruiting and flowering in tomatoes and vegetables. Available in bulk sizes (1, 5, or 25 pounds), it delivers a precise nutrient ratio optimized for hydroponic and soil gardening. Trusted by commercial growers, this formula supports rapid nutrient absorption and superior crop yields when used with complementary supplements like Magnesium Sulfate and Calcium Nitrate. ## Description MasterBlend fertilizers have been the go-to Hydroponic and Garden fertilizers for commercial gardeners for a long time. The Masterblend 4-18-38 fertilizer was specially developed for fruiting and flowering plants in both soil and hydroponic systems. It can be used alone as a bloom enhancer, or if you would like to use it as an all-in-one balanced formula, it is recommended to use the 4-18-38 together with Magnesium Sulfate (Epsom Salt) and Calcium Nitrate for a balanced water soluble fertilizer. 1 and 5 pounds will arrive in smaller packages. 25 pounds will be in the manufacturer's bag. It is recommended to use MasterBlend 4-18-38 in conjunction with Calcium Nitrate and Magnesium Sulfate (also available) in the following recipes... **Important! Do not mix the 3 components together! Doing so will cause nutrient lockout and all the nutrients will not be available to your plants. You can mix the MasterBlend and Epsom Salts together, but not the Calcium Nitrate! Ideally you should mix each component separately in your water until thoroughly dissolved before mixing the next component. 1 Gallon Recipe: 2.4 grams MasterBlend 4-18-38 2.4 grams Calcium Nitrate (15.5-0-0) 1.2 grams Magnesium Sulfate (Epsom Salt) 5 Gallon Recipe: 12 grams MasterBlend 4-18-38 12 grams Calcium Nitrate (15.5-0-0) 6 grams Magnesium Sulfate (Epsom Salt) ## Features - MasterBlend 4-18-38 Fertilizer in Bulk - Choose 1, 5, or 25 Pound Quantities of the Famous Masterblend 4-18-38 formula - MasterBlend World renowned Hydroponic Vegetable Fertilizer for Peppers and Tomatoes! - Super concentrated and easy to use! - MasterBlend is 100% water soluble, and contains all the trace minerals needed! ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B071V8B4FL | | Best Sellers Rank | #38,581 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #1,039 in Garden Fertilizers | | Brand Name | MasterBlend | | Coverage | Medium | | Customer Reviews | 4.7 4.7 out of 5 stars (1,241) | | Item Form | Powder | | Item Weight | 5 Pounds | | Manufacturer | MasterBlend | | Mixing Ratio | 1:0.5:1 (MasterBlend 4-18-38: Magnesium Sulfate: Calcium Nitrate) | | Model Number | MASTERBLEND 4-18-38 (5 POUNDS) | | Number of Items | 1 | | Part Number | MASTERBLEND 4-18-38 (5 POUNDS) | | Specific Uses For Product | Plant Growth, Seed Development, soil gardening | | Target Species | tomatoes, vegetables | | UPC | 600150826026 | | Unit Count | 80 Ounce | ## Product Details - **Brand:** MasterBlend - **Item Form:** Powder - **Item Weight:** 5 Pounds - **Manufacturer:** MasterBlend - **Specific Uses For Product:** Plant Growth, Seed Development, soil gardening ## Images ![MasterBlend 4-18-38 Tomato & Vegetable Fertilizer - Bulk 1, 5 or 25 Pounds (5 Pounds) - Image 1](https://m.media-amazon.com/images/I/71qG3EmNicL.jpg) ![MasterBlend 4-18-38 Tomato & Vegetable Fertilizer - Bulk 1, 5 or 25 Pounds (5 Pounds) - Image 2](https://m.media-amazon.com/images/I/81d3Ga3OdwL.jpg) ![MasterBlend 4-18-38 Tomato & Vegetable Fertilizer - Bulk 1, 5 or 25 Pounds (5 Pounds) - Image 3](https://m.media-amazon.com/images/I/81nqNsGtMKL.jpg) ## Questions & Answers **Q: Anybody use this for rdwc or dwc** A: I've been using this with all my hydroponics, Kratky Method, Aeroponics, DWC, etc. Won't use anything else. Great results! **Q: Is this organic? Thanks.** A: N-P-K and trace elements are all inert chemical elements. Plants ingest these chemicals using the bacterial and fungi in the soil. Your soil may have other organic material; some of which freaks down into N-P-K and trace elements in varying degrees depending on the material which has been composted. Elements are inert. Nitrogen is Nitrogen is Nitrogen. They are not organic. You have to look at the data sheets and figure how much fertilizer you are adding to you plants to keep them fed. You can call Masterblend and talk to their staff who can advise you on dosage. I normally use 12 Grams of 4-18-15 in 5 gallons of water along with 6 0z of Epson Salt (adds Magnesium which helps absorb trace elements plants also need) and 12 grams of 10-58-17. I occasionally use 12 Grams of 15-0-0 Calcium Nitrate for Blossom End Rot in tomatoes along with my 4-18-38 12 grams each in 5 gallons of water. NOTE This is very heavy feeding in a Hydroponic Dutch Bucket Tomato system. You need to come up with a dosage that works for you and should check on recommended mixtures any your garden or hydroponic setup. **Q: How often should I apply to the garden** A: Can you use this product in regular soul in your vegetable garden **Q: Is there CL (clorine) is this as a trace element?** A: It's not listed on the bag. I've had great luck with this I grow hydroponic tomatoes, lettuce, swiss chard, squash, and even hydroponic corn in dutch buckets (which is doing pretty well so far but this is an experiment). I forget if it says in the description, but I mix equal parts of this and calcium nitrate with 1/2 as much epsom salts. for 5 gallons of water that is 12 grams each of masterblend and calcium nitrate, and 6 grams of epsom salts. Food grows like crazy and tastes great. I have tomatoes in soil that are not growing as well as the dutch bucket tomatoes. ## Frequently Bought Together - MasterBlend 4-18-38 Tomato & Vegetable Fertilizer - Bulk 1, 5 or 25 Pounds (5 Pounds) - Calcium Nitrate 15.5-0-0 Fertilizer Bulk Pricing (5 POUNDS) --- ## 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.kr/products/41762991-masterblend-4-18-38-tomato-and-vegetable-fertilizer-bulk-1](https://www.desertcart.kr/products/41762991-masterblend-4-18-38-tomato-and-vegetable-fertilizer-bulk-1) --- *Product available on Desertcart South Korea* *Store origin: KR* *Last updated: 2026-07-12*