---
product_id: 168588646
title: "Greenway Biotech, Inc. Tomato Fertilizer 4-18-38 Powder - Water Soluble with Chelated Micronutrients for Tomatoes Peppers Eggplant - Bigger Fruit Better Flavor - Hydroponics or Soil - 1 LB"
brand: "greenway biotech, inc."
price: "$61.29"
currency: USD
in_stock: true
reviews_count: 8
category: "Greenway Biotech, Inc."
url: https://www.desertcart.us/products/168588646-greenway-biotech-inc-tomato-fertilizer-4-18-38-powder-water
store_origin: US
region: United States of America
---

# 4-18-38 NPK for fruit boost 100% water soluble, clog-free Chelated micronutrients, pH 4-9 Greenway Biotech, Inc. Tomato Fertilizer 4-18-38 Powder - Water Soluble with Chelated Micronutrients for Tomatoes Peppers Eggplant - Bigger Fruit Better Flavor - Hydroponics or Soil - 1 LB

**Brand:** greenway biotech, inc.
**Price:** $61.29
**Availability:** ✅ In Stock

## Summary

> 🍅 Unlock your garden’s full flavor potential with every sprinkle!

## Quick Answers

- **What is this?** Greenway Biotech, Inc. Tomato Fertilizer 4-18-38 Powder - Water Soluble with Chelated Micronutrients for Tomatoes Peppers Eggplant - Bigger Fruit Better Flavor - Hydroponics or Soil - 1 LB by greenway biotech, inc.
- **How much does it cost?** $61.29 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/168588646-greenway-biotech-inc-tomato-fertilizer-4-18-38-powder-water)

## Best For

- greenway biotech, inc. enthusiasts

## Why This Product

- Trusted greenway biotech, inc. brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Professional-Grade, Pure & Safe:** Independently tested for heavy metals, CDFA registered, ensuring clean, reliable nutrition for your plants.
- • **Effortless Application, Zero Clogs:** Dissolves fully in room temp water—ideal for foliar sprays, drip irrigation, hydroponics, and soil without nozzle blockages.
- • **Versatile for All Nightshade Crops:** One formula supports tomatoes, peppers, eggplants, potatoes & more—perfect for diverse home or professional gardens.
- • **Precision NPK for Peak Fruit Production:** High potassium (38%) fuels bigger, tastier tomatoes & peppers with low nitrogen to avoid leafy overload.
- • **Chelated Micronutrients for Maximum Uptake:** Iron, manganese, zinc, copper, boron & molybdenum stay available across pH 4-9, preventing nutrient lockout in soil & hydroponics.

## Overview

Greenway Biotech’s Tomato Fertilizer 4-18-38 is a water-soluble, chelated micronutrient-packed powder designed specifically for nightshade crops. Its high potassium formula promotes larger, better-tasting fruit while low nitrogen prevents excessive foliage. Suitable for hydroponic and soil systems, it dissolves completely without clogging and is rigorously tested for purity, making it a trusted choice for both home growers and professionals.

## Description

desertcart.com : Greenway Biotech, Inc. Tomato Fertilizer 4-18-38 Powder - Water Soluble with Chelated Micronutrients for Tomatoes Peppers Eggplant - Bigger Fruit Better Flavor - Hydroponics or Soil - 1 LB : Patio, Lawn & Garden

Review: Tomatoes are in constant need of nourishment - The Biotech product is water soluble and can be applied in a dedicated pump up sprayer. Tomatoes have a relatively short growing season and are in constant need of replenishing nutrients and trace minerals to support such rapid growth and prolific fruit production. The NPK balance of the Biotech product ensures you do not get more N than P and K. Nitrogen is best applied as a Calcium Nitrate about every three weeks to help with growth as wells as prevention of blossom end rot due to calcium deficiency. The P and K help with fruit production and root development and are essential to producing a good crop.
Review: Great product ! - Bought this product late December 2017 along with a bag of nitrate and a carton of Epsom Salt. I am growing tomatoes in my little green house here in Orange County, CA. I use Home Depot 5 galleon buckets and fill it with pearlite. So far I am having the best success I have ever had. I am growing winter tomatoes along with Early Girl and am amazed at the amount of tomatoes and the health of the plants. No crunchy brown leaves, I take the companies suggestion to weigh the fertilizer and use,( as per the MPH Gardner formula, which is on Youtube ) 12 grams of the product along with 12 grams of the nitrate and 6 grams of Epsom Salts in 5 galleons of water....which gives you an 19-18-38 NPK. Obviously, I am very pleased and will continue to use the product to grow my veggies.

## Features

- NIGHTSHADE CROP FORMULA 4-18-38 POWDER — Engineered specifically for tomatoes, peppers, eggplants, and potatoes; very high potassium (38%) drives bigger fruit, better flavor, and longer shelf life while low nitrogen (4%) prevents excessive foliage that robs energy from fruit production
- COMPLETE MICRONUTRIENT PACKAGE INCLUDED — Contains Iron, Manganese, Zinc, and Copper in EDTA-chelated form plus Boron and Molybdenum; chelated metals stay plant-available across pH 4-9, helping prevent nutrient lockout in soil and hydroponic systems
- 100% WATER SOLUBLE & CLOG-FREE — Professional-grade powder dissolves completely in room temperature water; ideal for soil drench, foliar spray, drip irrigation, NFT, DWC, and Dutch bucket systems without clogging nozzles or drip lines
- TESTED FOR PURITY, CDFA REGISTERED — Every batch independently tested for heavy metals with results consistently well below required limits; registered with California Department of Food and Agriculture for professional and home grower confidence
- VERSATILE FOR ALL NIGHTSHADES — One formula for your entire nightshade garden: beefsteak, cherry, roma, grape, and heirloom tomatoes, bell and hot peppers, eggplants, potatoes, tomatillos, and ground cherries; Made in USA since 1989

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B081ZF2H1B |
| Best Sellers Rank | #120,151 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #2,621 in Garden Fertilizers |
| Brand | Greenway Biotech, Inc. |
| Date First Available | July 23, 2015 |
| Is Discontinued By Manufacturer | No |
| Item Form | Powder |
| Item Weight | 1 pounds |
| Item model number | TB4-18-38 |
| Liquid Volume | 1 Quarts |
| Manufacturer | Greenway Biotech, Inc. |
| Number of Items | 1 |
| Package Dimensions | 8.11 x 5.31 x 0.91 inches |
| Specific Uses For Product | Hydroponic,Hydroponics |
| UPC | 619206360483 |
| Unit Count | 16.0 Ounce |

## Product Details

- **Brand:** Greenway Biotech, Inc.
- **Item Form:** Powder
- **Item Weight:** 16 ounces
- **Liquid Volume:** 1 Quarts
- **Specific Uses For Product:** Hydroponic,Hydroponics

## Images

![Greenway Biotech, Inc. Tomato Fertilizer 4-18-38 Powder - Water Soluble with Chelated Micronutrients for Tomatoes Peppers Eggplant - Bigger Fruit Better Flavor - Hydroponics or Soil - 1 LB - Image 1](https://m.media-amazon.com/images/I/61WrUbJpMvL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: Does anyone know how much to put in per gallon for a Hydroponic setup?**
A: This is for 5 gallons. I have been using this for tomatoes works great. 12 grams of the fertilizer. 12 grams calcium nitrate. 6 grams Epsom salt . You need gram scales. 28 grams in an ounce so not hardly half an ounce

**Q: I'm growing tomatoes and peppers in 20 gal. containers, what else do I need to go with this fertilizer?**
A: Calcium nitrate and Epsom salt is all that's needed along with this. If in soil no need for pH down but if you using soiless mediums then just pH down your solution about 1/4 teaspoon to 2mls hope this helps. :)

**Q: As side dressing when tomato plant is already producing large tomatoes, how to use? sprinkle on soil or mix in water and pour on soil around root??**
A: Hello,

You can use either way. 
If you would like to use for a liquid application you will need to dissolve 2.5 grams of fertilizer per gallon of water, and then poor onto soil.
Depending on the quality of the soil amounts vary, but one gallon of solution should be enough for about 15 to 20 adult tomato plants.

**Q: Can you put this straight into the reservoir of wicking tubs?**
A: Hello,

You can add it straight to the tubs but we usually recommend dissolving in a bit of water first for easier mixing.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Tomatoes are in constant need of nourishment
*by P***N on May 17, 2023*

The Biotech product is water soluble and can be applied in a dedicated pump up sprayer. Tomatoes have a relatively short growing season and are in constant need of replenishing nutrients and trace minerals to support such rapid growth and prolific fruit production. The NPK balance of the Biotech product ensures you do not get more N than P and K. Nitrogen is best applied as a Calcium Nitrate about every three weeks to help with growth as wells as prevention of blossom end rot due to calcium deficiency. The P and K help with fruit production and root development and are essential to producing a good crop.

### ⭐⭐⭐⭐⭐ Great product !
*by C***S on February 10, 2018*

Bought this product late December 2017 along with a bag of nitrate and a carton of Epsom Salt. I am growing tomatoes in my little green house here in Orange County, CA. I use Home Depot 5 galleon buckets and fill it with pearlite. So far I am having the best success I have ever had. I am growing winter tomatoes along with Early Girl and am amazed at the amount of tomatoes and the health of the plants. No crunchy brown leaves, I take the companies suggestion to weigh the fertilizer and use,( as per the MPH Gardner formula, which is on Youtube ) 12 grams of the product along with 12 grams of the nitrate and 6 grams of Epsom Salts in 5 galleons of water....which gives you an 19-18-38 NPK. Obviously, I am very pleased and will continue to use the product to grow my veggies.

### ⭐⭐⭐⭐⭐ My favorite so far.
*by A***R on January 13, 2017*

I have used this for the past few months as a base for all plants in my hydroponic garden. It is easy to mix and completely dissolves without using alot of mixing. As a general nutrient, I add calcium nitrate and magnesium sulfate differently for each plant. PPM / EC results are very predictable and accurate as described on the instructions. My mixes vary from EC 0.8 to 4.5 and I can hit the mark every time. PH does not go wild with this, it usually finished between 5.8 and 6.1 using Reverse Osmosis water. I have to do very little if any adjustments to the PH. Many liquid nutrients required heavy adjustments, not this. The resealable bag is rugged and designed to stand up without tipping or ripping. They do have a bulk option which I just purchased 25 lbs of each, tomato and calcium nitrate. It's the best so far. I grow tomatoes, bell peppers, Lettuce, cucumbers and flowers with this as a base for my hand mixed nutrients. Greenway Biotech is now my vendor for my nutrients. High quality at a reasonable price. You can't beat that.

## Frequently Bought Together

- Greenway Biotech Tomato Fertilizer Powder 4-18-38 Plus Trace Minerals- 100% Water Soluble Includes Essential Chelated Micronutrients- (1 Pound)
- Greenway Biotech Pepper & Herb Fertilizer 11-11-40 Powder with Micronutrients and Trace Minerals- 100% Water Soluble Fertilizers (1 Pound Makes 200 Gallons)
- Greenway Biotech Cucumber Fertilizer 8-16-36-100% Water Soluble Plus Chelated Micronutrients Suitable for Soil, hydroponics, and aeroponics - 1 Pound (Makes ~200 Gallons)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-07-08*