---
product_id: 178323931
title: "MasterBlend 4-18-38 Tomato & Vegetable Fertilizer - Bulk 1, 5 or 25 Pounds (25 Pounds)"
brand: "masterblend"
price: "2682 zł"
currency: PLN
in_stock: true
reviews_count: 2
category: "Masterblend"
url: https://www.desertcart.pl/products/178323931-masterblend-4-18-38-tomato-and-vegetable-fertilizer-bulk-1
store_origin: PL
region: Poland
---

# 100% water soluble Bulk sizes: 1, 5, 25 lbs Balanced 4-18-38 NPK ratio MasterBlend 4-18-38 Tomato & Vegetable Fertilizer - Bulk 1, 5 or 25 Pounds (25 Pounds)

**Brand:** masterblend
**Price:** 2682 zł
**Availability:** ✅ In Stock

## Summary

> 🌱 Grow like a pro with MasterBlend — the secret sauce for next-level harvests!

## 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?** 2682 zł with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/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

- • **Hydroponic Hero:** Trusted by commercial growers for superior water-soluble performance
- • **Trace Mineral Rich:** Complete with essential micronutrients for vibrant, healthy plants
- • **Mix Smart, Grow Strong:** Designed for separate mixing with Calcium Nitrate & Epsom Salt to avoid nutrient lockout
- • **Customizable Bulk Packs:** Choose your perfect size—1, 5, or 25 pounds for any scale
- • **Precision Nutrient Boost:** Optimized 4-18-38 formula fuels robust tomato & vegetable growth

## Overview

MasterBlend 4-18-38 Tomato & Vegetable Fertilizer is a premium, water-soluble hydroponic formula designed for serious gardeners and commercial growers. Available in bulk sizes up to 25 pounds, it delivers a precise nutrient balance with essential trace minerals to maximize tomato and vegetable yields. For best results, it’s used alongside Calcium Nitrate and Magnesium Sulfate with careful separate mixing to prevent nutrient lockout.

## Description

Product description MasterBlend fertilizers have been the go-to Hydroponic and Garden fertilizers for commercial gardeners for a long time. Their 4-18-38 Tomato and Vegetable Fertilizer provides proven results time after time. Because of the unique composition, it is recommended to use the 4-18-38 together with Magnesium Sulfate (Epsom Salt) and Calcium Nitrate for the ultimate balanced water soluble fertilizer. NOTE: Quantities of 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. DO NOT BUY KITS THAT ARE PREMIXED! 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) 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

Review: good for hydroponic tomatoes - hydroponic grown tomatoes
Review: Great fertilizer but too expensive buying in the UK - Had great success with this fertilizer but it's just too expensive to buy in the UK even from the importer in Belgium. 3 out of 5 I'm afraid.

## 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 |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 303,688 in Garden ( See Top 100 in Garden ) 323 in Vegetable Plant Fertilisers |
| Coverage | Medium |
| Customer Reviews | 4.4 4.4 out of 5 stars (5) |
| Date First Available | 26 April 2017 |
| Item Package Quantity | 1 |
| Item Weight | 11.3 kg |
| Item model number | MASTERBLEND 4-18-38 (25 POUNDS) |
| Manufacturer | MasterBlend |
| Package Dimensions | 38.1 x 33.02 x 8.89 cm; 11.34 kg |
| Part number | MASTERBLEND 4-18-38 (25 POUNDS) |
| Size | 25 Pounds |
| Special Features | organic |
| Specific uses | Hydroponic |

## Product Details

- **Brand:** Masterblend
- **Item form:** Bulk
- **Item weight:** 11.34 kg
- **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)
![MasterBlend 4-18-38 Tomato & Vegetable Fertilizer - Bulk 1, 5 or 25 Pounds (25 Pounds) - Image 5](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.

## Customer Reviews

### ⭐⭐⭐⭐⭐ good for hydroponic tomatoes
*by M***N on 25 July 2024*

hydroponic grown tomatoes

### ⭐⭐⭐ Great fertilizer but too expensive buying in the UK
*by T***D on 1 July 2020*

Had great success with this fertilizer but it's just too expensive to buy in the UK even from the importer in Belgium. 3 out of 5 I'm afraid.

## 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)

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*Product available on Desertcart Poland*
*Store origin: PL*
*Last updated: 2026-01-27*