--- product_id: 178323931 title: "MasterBlend 4-18-38 Tomato & Vegetable Fertilizer - Bulk 1, 5 or 25 Pounds (25 Pounds)" brand: "masterblend" price: "β‚©384715" currency: KRW in_stock: false url: https://www.desertcart.kr/products/178323931-masterblend-4-18-38-tomato-and-vegetable-fertilizer-bulk-1 store_origin: KR region: South Korea --- # 4-18-38 NPK ratio for optimal growth 100% water soluble for easy mixing Available in bulk: 1, 5, or 25 lbs MasterBlend 4-18-38 Tomato & Vegetable Fertilizer - Bulk 1, 5 or 25 Pounds (25 Pounds) **Brand:** masterblend **Price:** β‚©384715 **Availability:** ❌ Out of Stock ## Summary > 🌿 Grow like a proβ€”MasterBlend your way to harvest glory! ## Quick Answers - **What is this?** MasterBlend 4-18-38 Tomato & Vegetable Fertilizer - Bulk 1, 5 or 25 Pounds (25 Pounds) by masterblend - **How much does it cost?** β‚©384715 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/178323931-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 - β€’ **Precision NPK Formula:** Tailored 4-18-38 ratio fuels robust tomato & vegetable growth - β€’ **Avoid Nutrient Lockout:** Separate mixing ensures maximum nutrient availability and plant health - β€’ **Pro-Recommended Mixing:** Designed to pair perfectly with Calcium Nitrate & Epsom Salt for balanced nutrition - β€’ **Hydroponic-Grade Solubility:** Completely water soluble for seamless nutrient delivery - β€’ **Bulk Options for Every Scale:** Choose from 1, 5, or 25 pounds to fit your garden size ## Overview MasterBlend 4-18-38 Tomato & Vegetable Fertilizer is a professional-grade, water-soluble nutrient blend optimized for hydroponic and soil-grown tomatoes, peppers, and vegetables. Available in bulk sizes up to 25 pounds, it delivers a precise NPK ratio with essential trace minerals. For best results, it is used alongside Calcium Nitrate and Magnesium Sulfate, mixed separately to prevent nutrient lockout, ensuring vibrant, high-yield crops favored by commercial and serious home gardeners alike. ## Description Product description MasterBlend fertilizers 4-18-38 Tomato and Vegetable Fertilizer. Because of the unique composition, it is recommended to use the 4-18-38 together with Magnesium Sulfate (Epsom Salt) and Calcium Nitrate for a balanced water soluble fertilizer. It is recommended to use MasterBlend 4-18-38 in conjunction with Calcium Nitrate and Magnesium Sulfate (also available) in the following recipes. 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). This listing includes a bulk 25# Bag of Masterblend 4-18-38 fertilizer only. Directions 12g MasterBlend, 12g Calcium Nitrate, and 6g Epsom Salt for 5 gallons of nutrient solution, where each component is mixed into the water individually. (DO NOT BUY KITS THAT ARE PRE-MIXED! Nutrient lockout will occur and will be left as precipitates in your water) P.when('A').execute(function(A) { A.on('a:expander:toggle_description:toggle:collapse', function(data) { window.scroll(0, data.expander.$expander[0].offsetTop-100); }); }); Safety Warning Handle with care, avoid contact with skin and eyes, keep out of reach of children. See more ## Features - MasterBlend 4-18-38 Fertilizer in Bulk - Choose 1, 5, or 25 Pound Quantities - 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 | B0722JW1SZ | | Best Sellers Rank | 386,330 in Garden ( See Top 100 in Garden ) 390 in Vegetable Plant Fertilisers | | Brand Name | Masterblend | | Coverage | Medium | | Customer Reviews | 4.4 4.4 out of 5 stars (5) | | Item Form | Bulk | | Item Weight | 11.34 Kilograms | | Liquid Volume | 400 Fluid Ounces | | Manufacturer | MasterBlend | | Mixing Ratio | 2:2:1 | | Model Number | MASTERBLEND 4-18-38 (25 POUNDS) | | Number of Packs | 1 | | Part Number | MASTERBLEND 4-18-38 (25 POUNDS) | | Specific Uses For Product | Hydroponic | | Target Species | vegetables, tomatoes, peppers | | Unit Count | 11300 gram | ## Product Details - **Brand:** Masterblend - **Item form:** Bulk - **Item weight:** 11.34 Kilograms - **Liquid volume:** 400 Fluid Ounces - **Specific uses for product:** Hydroponic ## Images ![MasterBlend 4-18-38 Tomato & Vegetable Fertilizer - Bulk 1, 5 or 25 Pounds (25 Pounds) - Image 1](https://m.media-amazon.com/images/I/51QWF4s-P+L.jpg) ![MasterBlend 4-18-38 Tomato & Vegetable Fertilizer - Bulk 1, 5 or 25 Pounds (25 Pounds) - Image 2](https://m.media-amazon.com/images/I/51liJDtzebL.jpg) ![MasterBlend 4-18-38 Tomato & Vegetable Fertilizer - Bulk 1, 5 or 25 Pounds (25 Pounds) - Image 3](https://m.media-amazon.com/images/I/61e19UOidSL.jpg) ![MasterBlend 4-18-38 Tomato & Vegetable Fertilizer - Bulk 1, 5 or 25 Pounds (25 Pounds) - Image 4](https://m.media-amazon.com/images/I/71qG3EmNicL.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 (25 Pounds) - Magnesium Sulfate 100% Water Soluble (20 Pounds) --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.kr/products/178323931-masterblend-4-18-38-tomato-and-vegetable-fertilizer-bulk-1](https://www.desertcart.kr/products/178323931-masterblend-4-18-38-tomato-and-vegetable-fertilizer-bulk-1) --- *Product available on Desertcart South Korea* *Store origin: KR* *Last updated: 2026-09-25*