---
product_id: 43589230
title: "MasterBlend 4-18-38 Tomato & Vegetable Fertilizer - Bulk 1, 5 or 25 Pounds (1 Pound)"
brand: "masterblend"
price: "€ 33.78"
currency: EUR
in_stock: true
reviews_count: 8
category: "Master Blend"
url: https://www.desertcart.nl/products/43589230-masterblend-4-18-38-tomato-and-vegetable-fertilizer-bulk-1
store_origin: NL
region: Netherlands
---

# Super concentrated formula for maximum growth impact Balanced 4-18-38 NPK ratio tailored for tomatoes & veggies 100% water soluble for instant nutrient delivery MasterBlend 4-18-38 Tomato & Vegetable Fertilizer - Bulk 1, 5 or 25 Pounds (1 Pound)

**Brand:** masterblend
**Price:** € 33.78
**Availability:** ✅ In Stock

## Summary

> 🌱 Unlock your garden’s full potential with MasterBlend magic!

## Quick Answers

- **What is this?** MasterBlend 4-18-38 Tomato & Vegetable Fertilizer - Bulk 1, 5 or 25 Pounds (1 Pound) by masterblend
- **How much does it cost?** € 33.78 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/43589230-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

- • **Easy Mix & Use:** Dissolves instantly for hassle-free feeding, perfect for soil or hydroponics
- • **Pro Growth Formula:** Optimized NPK ratio fuels fruiting and leafy growth for peak harvests
- • **Hydroponic Powerhouse:** Trusted by commercial growers for consistent, robust yields
- • **Customizable Bulk Options:** Available in 1, 5, or 25 pounds to fit your garden scale
- • **Complete Trace Mineral Blend:** Supports vibrant plant health with essential micronutrients

## Overview

MasterBlend 4-18-38 Tomato & Vegetable Fertilizer is a highly concentrated, 100% water-soluble powder designed for hydroponic and soil gardening. Its precise nutrient ratio and complete trace minerals support vigorous growth and abundant yields, making it a top choice for professional and hobbyist growers alike. Available in bulk sizes, it’s easy to mix and proven to enhance the health and productivity of tomatoes, peppers, and other vegetables.

## 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. MasterBlend 4-18-38 is Water Soluble Direct from MasterBlend - Fertilizer for Tomatoes and Vegetables Highly concentrated! Master Blend fertilizer is perfect for Hydroponics and Soil gardens

Review: Excellent! - I've been using this for the peppers in my hydroponics system. It's easy to mix and the peppers love it!
Review: Excellent nutrients for Kratky method hydroponics - I use this blend with my small scale Kratky hydroponics system. It's very effective at supporting plant growth. Easy to mix in a five gallon bucket, it lasts a long time. I grow mostly lettuces and tiny tomatoes and this nutrient solution under a grow light and this assures we have fresh salads all winter long in Ohio. I've noticed a lot of Kratky method growers use this brand, and I can see why.

## 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 | B071HB13XR |
| Best Sellers Rank | #113,104 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #2,453 in Garden Fertilizers |
| Brand | MasterBlend |
| Date First Available | April 24, 2017 |
| Is Discontinued By Manufacturer | No |
| Item Form | Powder |
| Item Weight | 1 pounds |
| Item model number | MASTERBLEND 4-18-38 (1 POUND) |
| Liquid Volume | 16 Fluid Ounces |
| Manufacturer | MasterBlend |
| Number of Items | 1 |
| Package Dimensions | 8 x 6 x 1 inches |
| Specific Uses For Product | Hydroponic |
| UPC | 600150826019 |
| Unit Count | 16 Ounce |

## Product Details

- **Brand:** MasterBlend
- **Item Form:** Powder
- **Item Weight:** 16 ounces
- **Liquid Volume:** 16 Fluid Ounces
- **Specific Uses For Product:** Hydroponic

## Images

![MasterBlend 4-18-38 Tomato & Vegetable Fertilizer - Bulk 1, 5 or 25 Pounds (1 Pound) - Image 1](https://m.media-amazon.com/images/I/71qG3EmNicL.jpg)
![MasterBlend 4-18-38 Tomato & Vegetable Fertilizer - Bulk 1, 5 or 25 Pounds (1 Pound) - Image 2](https://m.media-amazon.com/images/I/81d3Ga3OdwL.jpg)
![MasterBlend 4-18-38 Tomato & Vegetable Fertilizer - Bulk 1, 5 or 25 Pounds (1 Pound) - Image 3](https://m.media-amazon.com/images/I/81nqNsGtMKL.jpg)

## Questions & Answers

**Q: Is there a kit available that contains the master blend, and also the  calcium nitrate and magnesium sulfate .  sure would be nice .**
A: Yes, sold in amazon and work great. Instructions on the bag and good price.

**Q: What the best way to adjust EC if its to low and you already mixed all 3 parts together**
A: First, you should not mix the calcium nitrate together with the master blend and magnesium sulfate (EPSON salts)  at the same time. Mix the master blend and EPSON salts together and mix the calcium nitrate separately before adding to your nutrient solution. When you mix all 3 together at the same time it binds up the nutrients and they can’t release properly.   See if mixing them separately before adding helps.

**Q: Can this fertilizer be applied directly to container plants or must it only be used in a hydroponic system?**
A: Container plants will love this. I top dress soil and water in. I also measure it in filtered water to apply. It's very good stuff.

**Q: Newby here, I have an organic container garden, are this supplements synthetic? I purchased this and not sure if I should use it.**
A: Totally synthetic, so now what?

## Customer Reviews

### ⭐⭐⭐⭐⭐ Excellent!
*by D***A on June 19, 2025*

I've been using this for the peppers in my hydroponics system. It's easy to mix and the peppers love it!

### ⭐⭐⭐⭐⭐ Excellent nutrients for Kratky method hydroponics
*by L***. on July 14, 2025*

I use this blend with my small scale Kratky hydroponics system. It's very effective at supporting plant growth. Easy to mix in a five gallon bucket, it lasts a long time. I grow mostly lettuces and tiny tomatoes and this nutrient solution under a grow light and this assures we have fresh salads all winter long in Ohio. I've noticed a lot of Kratky method growers use this brand, and I can see why.

### ⭐⭐⭐⭐⭐ MasterBlend produces excellent lettuec
*by A***S on September 2, 2020*

MasterBlend 4-18-38 produces lettuce with normal growth when used in a hydroponic solution. At first I was skeptical about this formula because of the low nitrogen ratio. I prefer a balanced formulation. I tried this product because of the exhaustive list of micro nutrients and I'm happy with the results. The lack of a single micro nutrient can spell disaster for a crop. Did not use Epsom salts as recommended on the package. Thanks to manufacturer for specifying dilutions in teaspoons and grams as I don't have a gram scale. Hydroponics is an excellent way to produce salad vegetables in a small space for your family. I've been using this growing technique for thirty years and I've experience with many products. Highly recommended!

## Frequently Bought Together

- MasterBlend 4-18-38 Tomato & Vegetable Fertilizer - Bulk 1, 5 or 25 Pounds (1 Pound)
- Calcium Nitrate 15.5-0-0 Fertilizer Bulk Pricing (5 POUNDS)

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*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-02-15*