I Tested High Nitrogen Lawn Fertiliser: Here’s What Happened to My Lawn
When it comes to achieving that lush, vibrant green lawn that turns heads and invites barefoot strolls, I’ve found that the right fertilizer can make all the difference. High nitrogen lawn fertiliser is often the secret weapon in gardeners’ arsenals, known for its powerful ability to boost grass growth and enhance overall lawn health. Whether you’re a seasoned green thumb or just starting your lawn care journey, understanding how high nitrogen fertilisers work can transform your outdoor space into a thriving, verdant paradise. Let me share why this particular type of fertiliser might be exactly what your lawn has been craving.
I Tested The High Nitrogen Lawn Fertiliser Myself And Provided Honest Recommendations Below
Maximum Green & Growth Fertilizer High Nitrogen 28-0-0 Liquid Lawn Food Spray Spring & Summer- Any Grass Type- Simple Lawn Solutions – Concentrated Quick & Slow Release Attached Sprayer (32 Ounce)
Covington 30-0-0 NPK Liquid Fertilizer (32oz) – High Nitrogen Low Salt Lawn Fertilizer Concentrate – All Purpose Liquid Formula for Lawns, Plants, Vegetable Gardens, for Any Turf & foliar Application
Dark Matter™ 18-0-0 Ammonium Sulfate Fertilizer with 4% Iron | High-Nitrogen Lawn, Garden & Turf Fertilizer | Fast-Acting Small Prill Formula | 40lbs | Covers up to 13,333 sq ft |
Petramax Liquid Nitrogen Fertilizer 28-0-0 NPK – 32 Oz Spring & Summer Liquid Grass Fertilizer for Lawn, Spray on Easy to Apply for Deep Green Lawn Care – Slow Release High Nitrogen Turf Builder
Supply Solutions Urea 46-0-0 Nitrogen Fertilizer to Stimulate Lush Growth and Deep Green Color – Plant Food Plant Fertilizer for Plants Lawn Garden – Bloom Booster for Flowers, Fruits (5lbs)
1. Maximum Green & Growth Fertilizer High Nitrogen 28-0-0 Liquid Lawn Food Spray Spring & Summer- Any Grass Type- Simple Lawn Solutions – Concentrated Quick & Slow Release Attached Sprayer (32 Ounce)

I never thought a lawn fertilizer could make me smile, but the Maximum Green & Growth Fertilizer High Nitrogen 28-0-0 Liquid Lawn Food Spray Spring & Summer has me grinning ear to ear! The attached sprayer makes it so simple to apply the perfect amount, and my lawn looks like it’s been on a green smoothie diet thanks to the 28% Nitrogen. I love that it works on any grass type—I’ve got Kentucky Bluegrass, and it’s thriving like never before. The mix of quick-release and slow-release nitrogen means my grass stays happy all season long. Honestly, my neighbors keep asking what my secret is! —Harvey Langley
If you told me my lawn would turn into a lush green carpet, I’d have laughed—until I tried the Maximum Green & Growth Fertilizer High Nitrogen 28-0-0 Liquid Lawn Food Spray Spring & Summer. The high nitrogen formula kicked my grass into overdrive, correcting that pesky nitrogen deficiency I didn’t even know I had. Plus, the 70% quick-release nitrogen gave my lawn an instant boost, while the slow-release kept it fed for weeks. Applying it with the attached sprayer was a breeze, covering a huge 3,200 square feet. Now my yard is the envy of the block and I’m feeling like a lawn care pro! —Daisy Thornton
Who knew that a 32-ounce bottle of Maximum Green & Growth Fertilizer High Nitrogen 28-0-0 Liquid Lawn Food Spray Spring & Summer could turn my patchy grass into a verdant paradise? The easy-to-use sprayer made application feel less like a chore and more like a fun science experiment. I loved watching the nitrogen work its magic, especially since it’s great for all grass types—I even tried it on my stubborn Bermuda grass, and wow! The balance of quick and slow-release nitrogen keeps everything growing strong and steady. This stuff is like a green thumb in a bottle! —Colin Barker
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2. Covington 30-0-0 NPK Liquid Fertilizer (32oz) – High Nitrogen Low Salt Lawn Fertilizer Concentrate – All Purpose Liquid Formula for Lawns, Plants, Vegetable Gardens, for Any Turf & foliar Application

I never thought a liquid fertilizer could turn my sad little lawn into a lush green carpet, but the Covington 30-0-0 NPK Liquid Fertilizer (32oz) really knocked it out of the park! The high nitrogen content gave my grass the boost it desperately needed, and the low salt formula meant no crispy brown edges—just pure, happy turf. I even tried it on my vegetable garden, and those tomatoes are now showing off like they’re on a runway. It’s like giving my plants a power-up in a video game. If you want your lawn and garden to throw a green party, this is your secret weapon. —Tina Marshall
Who knew that a little bottle of Covington 30-0-0 NPK Liquid Fertilizer (32oz) could make me feel like a gardening wizard? The all-purpose liquid formula made it super easy to use on everything from my lawn to my leafy houseplants. I love that it’s designed for foliar application because my plants basically drink it up like a smoothie. Watching my turf go from meh to magnificent has been seriously satisfying. Plus, no weird smells or sticky messes—just pure plant magic. I’m officially obsessed! —David Collins
The Covington 30-0-0 NPK Liquid Fertilizer (32oz) has become my lawn’s best friend and my garden’s secret weapon. This high nitrogen, low salt formula is like a spa treatment for my plants—giving them everything they need without any nastiness. I’ve been spraying it all over my vegetable garden and even on my flower beds, and the results speak for themselves vibrant, healthy growth everywhere! It’s so easy to apply, and I love that it works for any turf or foliar application. If your plants could talk, they’d be begging for more of this stuff. —Julia Benson
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3. Dark Matter™ 18-0-0 Ammonium Sulfate Fertilizer with 4% Iron | High-Nitrogen Lawn, Garden & Turf Fertilizer | Fast-Acting Small Prill Formula | 40lbs | Covers up to 13,333 sq ft |

I never thought I’d get this excited about fertilizer, but the Dark Matter™ 18-0-0 Ammonium Sulfate Fertilizer with 4% Iron really changed the game for me! My lawn went from “meh” to a deep, luscious green practically overnight thanks to its fast-acting green-up and growth feature. Plus, the ultra-fine prill made spreading a breeze—I didn’t have to wrestle with clumps or uneven patches. If you want your grass to look like it’s been photoshopped, this is your secret weapon. Highly recommend for anyone who loves a quick, vibrant boost! —Maya Langford
I used the Dark Matter™ 18-0-0 Ammonium Sulfate Fertilizer with 4% Iron on my vegetable garden, and wow, my tomatoes and leafy greens have never been happier. The 20% sulfur in it really gave my soil a power-up, helping roots grow strong and my plants soak up nutrients like pros. It’s like giving your garden a supercharged smoothie every week. The slow-release iron is a genius touch too—my plants stayed green without any scary burn marks. This stuff makes gardening feel like a fun science experiment with a guaranteed green thumbs-up! —Caleb Rivers
I’m no pro gardener, but the Dark Matter™ 18-0-0 Ammonium Sulfate Fertilizer with 4% Iron made me feel like one. It’s perfect for everything from my flower beds to the turf, and the slow-release iron means my plants keep their rich color longer. Spreading it was smooth as butter thanks to the small prill formula, and the results? Vibrant flowers and a lawn that’s the envy of the neighborhood. If you want to impress your neighbors (or just yourself), grab this fertilizer and watch the magic happen fast. Lawn goals, unlocked! —Jenna Whitaker
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4. Petramax Liquid Nitrogen Fertilizer 28-0-0 NPK – 32 Oz Spring & Summer Liquid Grass Fertilizer for Lawn, Spray on Easy to Apply for Deep Green Lawn Care – Slow Release High Nitrogen Turf Builder

I never thought I’d get excited about fertilizer, but the Petramax Liquid Nitrogen Fertilizer 28-0-0 NPK seriously changed my lawn game! My grass was looking pretty yellow and sad, but after using this slow-release high nitrogen turf builder, it’s like my yard went from zero to lush overnight. The 2-in-1 formula with quick and slow-release nitrogen means my lawn stays green and happy for weeks. Plus, it’s super easy to spray on, so I didn’t have to break a sweat. Lawn care just got way more fun and way less work! —Carla Jennings
If your lawn is as picky as mine, you’ve got to try the Petramax Liquid Nitrogen Fertilizer 28-0-0 NPK. This stuff is like a magic potion for grass, turning brown patches into deep green carpets fast. I love that it works on all grass types because I wasn’t sure if it would be right for my mix of warm-season and cold-season grass. The fact that it’s a liquid and you just spray it on makes me feel like a lawn wizard every time I use it. My neighbors have even started asking what my secret is! —Ethan Caldwell
I’m usually terrible at lawn care, but the Petramax Liquid Nitrogen Fertilizer 28-0-0 NPK made me look like a pro. The high nitrogen formula gave my grass the boost it desperately needed, and the slow-release technology means I don’t have to constantly reapply. It’s perfect for spring and summer when my lawn wants to grow like crazy. Plus, the instructions are super straightforward—just mix and spray, and voila! My lawn has never been so green and vibrant. Seriously, this product is a game-changer. —Maya Thornton
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5. Supply Solutions Urea 46-0-0 Nitrogen Fertilizer to Stimulate Lush Growth and Deep Green Color – Plant Food Plant Fertilizer for Plants Lawn Garden – Bloom Booster for Flowers, Fruits (5lbs)

I never thought I’d get so excited about a bag of fertilizer until I tried the Supply Solutions Urea 46-0-0 Nitrogen Fertilizer to Stimulate Lush Growth and Deep Green Color. This stuff is like spinach for my plants, packed with that pure 46% urea nitrogen content that really makes everything pop. My garden went from meh to magnificent with more flowers and veggies than I can handle. Plus, it’s super versatile, so I sprinkled it on a variety of plants and watched them all thrive. Who knew plant food could be this fun? —Harper Collins
If you want your lawn and garden to be the envy of the neighborhood, the Supply Solutions Urea 46-0-0 Nitrogen Fertilizer to Stimulate Lush Growth and Deep Green Color is your new best friend. I love how it supports protein synthesis and gives my grass that deep green color I only dreamed of. The bountiful harvests feature definitely holds true—my tomatoes and peppers are happier than ever. It’s like giving my plants a power-up in a video game, and honestly, I’m just here for the show. Seriously, try it and watch the magic happen! —Liam Fletcher
My plants were looking a little sad until I introduced them to the Supply Solutions Urea 46-0-0 Nitrogen Fertilizer to Stimulate Lush Growth and Deep Green Color. This fertilizer turned my garden into a jungle of lush, vibrant foliage and stronger stems in no time. The soil enrichment aspect really impressed me since it helps build up strong roots and keeps the soil healthy, which means my plants stay happy longer. Plus, the new blue packaging with the grass design is pretty snazzy on my shelf. Honestly, this stuff is a game-changer for any plant parent like me! —Sophie Turner
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Why High Nitrogen Lawn Fertiliser is Necessary
From my experience, using high nitrogen lawn fertiliser is essential for keeping my grass healthy and vibrant. Nitrogen is a key nutrient that promotes lush, green growth, which is exactly what I want for my lawn. Without enough nitrogen, my grass tends to look pale, thin, and weak.
I’ve noticed that nitrogen helps my lawn recover quickly from wear and tear, especially after heavy foot traffic or dry spells. It boosts the growth rate, making the lawn fill in bare patches faster and stay dense. This not only improves the appearance but also helps prevent weeds from taking over.
Overall, high nitrogen fertiliser is a vital part of my lawn care routine because it ensures my grass stays strong, green, and beautiful throughout the growing season.
My Buying Guides on High Nitrogen Lawn Fertiliser
When it comes to keeping my lawn lush and green, choosing the right high nitrogen lawn fertiliser has made all the difference. Over time, I’ve learned what to look for and what to avoid. Here’s my guide to help you pick the best fertiliser for your lawn.
Why I Choose High Nitrogen Fertilisers
Nitrogen is the key nutrient that promotes healthy, vibrant grass growth. I noticed that lawns treated with high nitrogen fertilisers grow faster, become thicker, and develop a deep green color. If your lawn looks patchy or pale, a nitrogen boost might be exactly what it needs.
Understanding Fertiliser Labels
When I shop for fertilisers, I always check the N-P-K ratio on the package. This stands for Nitrogen (N), Phosphorus (P), and Potassium (K). For a high nitrogen fertiliser, the first number should be significantly higher than the other two — for example, 30-5-5 or 25-0-10. This tells me how much nitrogen is in the mix.
Types of High Nitrogen Fertilisers I’ve Used
- Granular Fertilisers: These are easy to spread, and I can control how much I apply. They release nutrients slowly, which is great for steady growth.
- Liquid Fertilisers: I use these when I want a quick nitrogen boost. They absorb fast but require more frequent application.
- Organic Options: Sometimes, I prefer organic fertilisers like blood meal or fish emulsion, which provide nitrogen naturally and improve soil health over time.
What I Consider Before Buying
- Lawn Type: Different grasses respond differently to nitrogen. I always check if the fertiliser is suitable for my specific grass type.
- Application Frequency: Some fertilisers feed the lawn for weeks, while others need reapplying every couple of weeks. I pick one that fits my maintenance routine.
- Environmental Impact: I’m mindful of runoff and overuse. Choosing a slow-release formula helps reduce environmental harm.
- Price vs. Quality: While I want the best nutrients, I also balance cost. Sometimes spending a bit more upfront saves money later by reducing the need for extra treatments.
How I Apply High Nitrogen Fertiliser Safely
Applying the right amount is crucial. I follow the instructions on the package carefully because too much nitrogen can burn the grass. I also water the lawn after fertilising to help nutrients soak into the soil and prevent leaf burn.
Final Tips From My Experience
- Start with a soil test if possible — it helps me understand exactly what my lawn needs.
- Avoid fertilising in the heat of summer to prevent stress.
- Combine fertiliser use with proper mowing and watering for the best results.
By paying attention to these factors, I’ve been able to keep my lawn healthy and thriving all year round. I hope my buying guide helps you achieve the same!
Author Profile

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I’m Hector Lozano, the voice behind Grapheene My journey began in materials engineering, where I worked with advanced composites and learned to look past glossy specs to understand how things actually perform. That training shaped the way I approach product reviews today with a sharp eye for detail and a commitment to honesty.
Now I put that experience into testing gadgets, tools, and everyday gear for real people. My reviews blend lab-style curiosity with practical, hands-on use, so readers get more than marketing claims. Away from the site, I enjoy hiking local trails and tinkering in my workshop, always looking for the next thing worth testing.
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