---
product_id: 326352756
title: "Petramax Liquid Nitrogen Fertilizer 28-0-0 NPK - 1 Gallon Spring & Summer Liquid Grass Fertilizer for Lawn, Spray on Easy to Apply for Deep Green Lawn Care - Slow Release High Nitrogen Turf Builder"
brand: "petra"
price: "$302"
currency: NZD
in_stock: true
reviews_count: 13
category: "Petra"
url: https://www.desertcart.nz/products/326352756-petramax-liquid-nitrogen-fertilizer-28-0-0-npk-1-gallon
store_origin: NZ
region: New Zealand
---

# 70% quick + 30% slow release for sustained growth 28% ultra-high nitrogen for rapid green-up 1 gallon covers up to 25,600 sq. ft. with easy spray application Petramax Liquid Nitrogen Fertilizer 28-0-0 NPK - 1 Gallon Spring & Summer Liquid Grass Fertilizer for Lawn, Spray on Easy to Apply for Deep Green Lawn Care - Slow Release High Nitrogen Turf Builder

**Brand:** petra
**Price:** $302
**Availability:** ✅ In Stock

## Summary

> 🌿 Unlock the secret to envy-worthy lawns with every spray!

## Quick Answers

- **What is this?** Petramax Liquid Nitrogen Fertilizer 28-0-0 NPK - 1 Gallon Spring & Summer Liquid Grass Fertilizer for Lawn, Spray on Easy to Apply for Deep Green Lawn Care - Slow Release High Nitrogen Turf Builder by petra
- **How much does it cost?** $302 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/326352756-petramax-liquid-nitrogen-fertilizer-28-0-0-npk-1-gallon)

## Best For

- petra enthusiasts

## Why This Product

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

## Key Features

- • **Turbocharge Your Turf:** Ultra-high 28-0-0 nitrogen formula delivers instant lush green transformation.
- • **Effortless Application:** Mix and spray with ease; covers massive lawns up to 25,600 sq. ft. for maintenance or 12,800 sq. ft. for recovery.
- • **Dual-Action Growth Power:** 70% quick-release nitrogen for fast results, 30% slow-release for lasting lawn health.
- • **Proudly American & Trusted:** Family-owned USA brand with 100% satisfaction guarantee and expert customer support.
- • **Universal Grass Compatibility:** Perfect for all grass types—warm or cold season—ensuring consistent vibrant growth.

## Overview

Petramax Liquid Nitrogen Fertilizer is a premium 1-gallon liquid lawn booster featuring a potent 28-0-0 NPK formula. It combines 70% quick-release and 30% slow-release nitrogen to deliver rapid greening and sustained turf growth. Suitable for all grass types, it covers up to 25,600 sq. ft. per application and is designed for easy spray-on use. Made by a trusted American family-owned company, it guarantees a deep green, thick lawn with minimal effort.

## Description

desertcart.com : Petramax Liquid Nitrogen Fertilizer 28-0-0 NPK - 1 Gallon Spring & Summer Liquid Grass Fertilizer for Lawn, Spray on Easy to Apply for Deep Green Lawn Care - Slow Release High Nitrogen Turf Builder : Patio, Lawn & Garden

Review: Wow. - Look if you're using iron but you're not using nitrogen you're kinda wasting your time. It's gotta be both. This stuff worked great for me. A noticable difference just with the first 24 hours (which means I definitely had a nitrogen deficiency). If you apply it but don't water the daylights out of the lawn for the first week you're not going to see growth or color improvement. Water grows grass better than anything. You can't just spray nitrogen on the lawn then water for 15 minutes every other day and expect growth. You can't just put down nitrogen and never put iron and expect a huge improvement. In the high desert of Colorado if you're watering for less than 30 minutes daily you're really just wasting water because the water you are applying never makes it to the roots and just cooks off. Big drinks less often are better than tiny drinks more frequently. If you're going to water every other day or every two days it's gotta be 30-60 minutes, or more specifically 3/4"-1" of rainfall per week. Anything less and you're just "keeping it alive", you're not gaining ground. If you use this product as directed and a healthy water regimen you will absolutely notice a difference. Grass is very difficult to grow here and this product will absolutely become a regular application for me.
Review: Clear instructions and great quality - Applied to my Bermuda lawn in Alabama. First nitrogen application this year in May and it responded extremely well, I was hesitant to apply to much considering I haven’t had an application this year but this ended up being exactly what my lawn needed! Just follow the instructions on the back and what the greenness of your lawn come back to life!

## Features

- ULTIMATE LIQUID NITROGEN FERTILIZER: This liquid lawn food supplement has an ultra-high nitrogen formula to promote green grass and quick growth. Easily turn yellow & nitrogen deficient grass into a lush thick green!
- 28-0-0 QUICK & SLOW RELEASE TECHNOLOGY: This 2-in-1 liquid lawn fertilizer formula provides 70% quick-release nitrogen for rapid green and growth and 30% slow-release nitrogen for ongoing growth between applications.Get the best of both worlds in 1 easy application.
- WORKS WITH ALL GRASS TYPES: Whether you have warm- or cold-season grass, this is the perfect liquid grass food for quick green-up. It's super-effective in making your lawn green and to achieve consistent growth. Ideal for both new and old lawns.
- Apply Nitrogen to Your Lawn Quickly: PetraTools created our NPK lawn booster to be simple and easy to use. Mix 5oz of liquid nitrogen per gallon of water for maintenance or 10 oz per gallon to correct nitrogen levels. Treats up to 25,600 Sq. Ft. for maintenance or 12,800 Sq. Ft. of nitrogen deficient grass. For best results, use a PetraTools sprayer to evenly spray mixture across lawn.
- American Family-Owned Company & USA Support: PetraTools is a USA-based company located in Carlisle, Pennsylvania. All PetraTools products have a 100% satisfaction guarantee and excellent USA customer service members waiting by the phones to answer any questions you may have. PetraTools continues to work hard to deliver top-quality sprayers & solutions to keep your home, lawn, and places of business clean, green, and safe.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B095BP65VY |
| Best Sellers Rank | #44,472 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #1,181 in Garden Fertilizers |
| Brand | Petra |
| Customer Reviews | 4.4 4.4 out of 5 stars (887) |
| Item Form | Liquid |
| Item Weight | 5 ounces |
| Item model number | 28-0-0-1Gallon |
| Liquid Volume | 128 Fluid Ounces |
| Manufacturer | Petra |
| Number of Items | 1 |
| Package Dimensions | 10.59 x 7.2 x 4.84 inches |
| Specific Uses For Product | Lawn,Lawns |
| UPC | 850029123408 |
| Unit Count | 128.0 Fluid Ounces |

## Product Details

- **Brand:** Petra
- **Item Form:** Liquid
- **Item Weight:** 5 Ounces
- **Liquid Volume:** 128 Fluid Ounces
- **Specific Uses For Product:** Lawn,Lawns

## Images

![Petramax Liquid Nitrogen Fertilizer 28-0-0 NPK - 1 Gallon Spring & Summer Liquid Grass Fertilizer for Lawn, Spray on Easy to Apply for Deep Green Lawn Care - Slow Release High Nitrogen Turf Builder - Image 1](https://m.media-amazon.com/images/I/81l+IUfYfEL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Wow.
*by J***. on August 5, 2024*

Look if you're using iron but you're not using nitrogen you're kinda wasting your time. It's gotta be both. This stuff worked great for me. A noticable difference just with the first 24 hours (which means I definitely had a nitrogen deficiency). If you apply it but don't water the daylights out of the lawn for the first week you're not going to see growth or color improvement. Water grows grass better than anything. You can't just spray nitrogen on the lawn then water for 15 minutes every other day and expect growth. You can't just put down nitrogen and never put iron and expect a huge improvement. In the high desert of Colorado if you're watering for less than 30 minutes daily you're really just wasting water because the water you are applying never makes it to the roots and just cooks off. Big drinks less often are better than tiny drinks more frequently. If you're going to water every other day or every two days it's gotta be 30-60 minutes, or more specifically 3/4"-1" of rainfall per week. Anything less and you're just "keeping it alive", you're not gaining ground. If you use this product as directed and a healthy water regimen you will absolutely notice a difference. Grass is very difficult to grow here and this product will absolutely become a regular application for me.

### ⭐⭐⭐⭐⭐ Clear instructions and great quality
*by H***E on June 7, 2025*

Applied to my Bermuda lawn in Alabama. First nitrogen application this year in May and it responded extremely well, I was hesitant to apply to much considering I haven’t had an application this year but this ended up being exactly what my lawn needed! Just follow the instructions on the back and what the greenness of your lawn come back to life!

### ⭐⭐⭐⭐ Expensive but worth it.
*by G***T on November 4, 2024*

Surprised at the small quantity. It is also expensive. But don't be fooled by either. This works really well. A single application made my lawn looking from dismal to good. A second application made it very good. What's the point in buying large quantity of something that's cheap but works mediocre at best? I would buy this again next season.

## Frequently Bought Together

- Petramax Liquid Nitrogen Fertilizer 28-0-0 NPK - 1 Gallon Spring & Summer Liquid Grass Fertilizer for Lawn, Spray on Easy to Apply for Deep Green Lawn Care - Slow Release High Nitrogen Turf Builder
- PetraTools Liquid Iron For Lawns - Chelated Iron, Liquid Iron for Plants, Liquid Lawn Fertilizer Concentrate Solutions, Chelated Iron for Plants, Lawn Iron Formula, EDTA-Free & Made In The USA (1 Gal)

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.nz/products/326352756-petramax-liquid-nitrogen-fertilizer-28-0-0-npk-1-gallon](https://www.desertcart.nz/products/326352756-petramax-liquid-nitrogen-fertilizer-28-0-0-npk-1-gallon)

---

*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-10*