---
product_id: 87108686
title: "Fire NPK .7-21-17.5, FIRE4L, 4 L"
brand: "heavy 16"
price: "£195.61"
currency: GBP
in_stock: true
category: "Lawn Garden"
url: https://www.desertcart.co.uk/products/87108686-fire-npk-7-21-17-5-fire4l-4-l
store_origin: GB
region: Great Britain
---

# 4L Volume N-P-K Ratio P/K Booster Fire NPK .7-21-17.5, FIRE4L, 4 L

**Brand:** heavy 16
**Price:** £195.61
**Availability:** ✅ In Stock

## Summary

> 🌱 Ignite Your Growth Journey!

## Quick Answers

- **What is this?** Fire NPK .7-21-17.5, FIRE4L, 4 L by heavy 16
- **How much does it cost?** £195.61 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/87108686-fire-npk-7-21-17-5-fire4l-4-l)

## Best For

- heavy 16 enthusiasts

## Why This Product

- Trusted heavy 16 brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Effortless Application:** Convenient 4L size for easy mixing and application.
- • **Designed for Professionals:** Crafted for the discerning gardener who demands results.
- • **Precision Nutrient Formula:** Experience the perfect N-P-K ratio for explosive growth.
- • **Join the Heavy 16 Revolution:** Elevate your gardening game and watch your plants thrive!
- • **Unleash Your Garden's Potential:** Transform your plants with a powerful nutrient boost!

## Overview

Fire NPK .7-21-17.5 is a premium nutrient booster designed for serious gardeners. With a specialized N-P-K ratio of 0.7-21-17.5, this 4L supplement enhances plant growth and flowering, ensuring your garden reaches its full potential. Perfect for both amateur and professional horticulturists, this product promises to deliver impressive results with ease.

## Description

Fire NPK .7-21-17.5, FIRE4L, 4 L

## Features

- Heavy 16 Fire P/K Booster Oz, Quart, Gallon Supplement Nutrient Booster Additive
- Brand: Heavy 16 - Part No.: FIRE4L - UPC: 728028199246 - N-P-K Ratio: 0.7-21.17.5 - Volume: 4 L
- 1 Gallon

## Images

![Fire NPK .7-21-17.5, FIRE4L, 4 L - Image 1](https://m.media-amazon.com/images/I/71GtR34XGYL.jpg)

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**Shop now:** [https://www.desertcart.co.uk/products/87108686-fire-npk-7-21-17-5-fire4l-4-l](https://www.desertcart.co.uk/products/87108686-fire-npk-7-21-17-5-fire4l-4-l)

---

*Product available on Desertcart Great Britain*
*Store origin: GB*
*Last updated: 2026-04-23*