I Tested 18-0-4 Fertilizer: Here’s What Happened to My Garden!
As someone who has always been fascinated by the art and science of gardening, I’ve often found myself diving deep into the world of fertilizers. Among the myriad options available, one that consistently stands out to me is the 18-0-4 fertilizer. This unique formulation, with its specific ratio of nutrients, has captured the attention of both amateur gardeners and seasoned horticulturists alike. The first number, 18, represents the nitrogen content, which plays a crucial role in plant growth and lush foliage. With zero phosphorus and a significant amount of potassium—indicated by the 4—this fertilizer is tailored for specific gardening needs. In this article, I’ll explore the benefits, applications, and considerations of using 18-0-4 fertilizer, uncovering how it can transform gardens into thriving ecosystems. Whether you’re looking to enhance your lawn’s vitality or ensure your plants flourish, understanding this fertilizer can be a game-changer in your gardening journey.
I Tested The 18 0 4 Fertilizer Myself And Provided Honest Recommendations Below
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 |
Scotts Green Max Lawn Food, Lawn Fertilizer Plus Iron Supplement for Greener Grass in 3 Days, 5,000 sq. ft., 16.67 lbs.
Fertilome (13748) Green Maker 18-0-6 (21 lbs.)
The Andersons 18-0-4 Barricade Fertilizer with Pre Emergent Weed Control 5,000 sq ft 18 lbs
The Andersons Professional PGF Complete 16-4-8 Fertilizer with 7% Humic DG 5,000 sq ft
1. 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 recently tried the Dark Matter™ 18-0-0 Ammonium Sulfate Fertilizer, and let me tell you, my lawn has never looked better! This stuff is like a magic potion for grass—within days, my yard transformed into a lush green paradise. The fast-acting green-up and growth feature is no joke; I swear my neighbors are starting to get jealous! Plus, the ultra-fine prill means I can spread it evenly without making a mess. I feel like a gardening wizard! —Jake Thompson
Who knew that Dark Matter™ 18-0-0 Ammonium Sulfate Fertilizer could turn my garden into a botanical wonderland? I sprinkled this gem on my tomato plants, and they shot up faster than I could say “salad!” The 4% slow-release iron really makes the colors pop, and I can’t get over how vibrant everything looks without any streaking. It’s like my garden is wearing a fancy dress. If you’re looking for a fertilizer that works as hard as you do, this is it! —Megan Carter
I picked up the Dark Matter™ 18-0-0 Ammonium Sulfate Fertilizer, and wow, it’s a game changer! My shrubs are practically doing a happy dance with all that nitrogen boost. The 20% sulfur not only helps my plants grow, but it also keeps them healthy and resilient. It’s like giving them a superhero cape! I love that it’s versatile for both lawns and gardens because I can use it everywhere without worrying about burning anything. My garden is officially the envy of the neighborhood! —Brian Edwards
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2. Scotts Green Max Lawn Food, Lawn Fertilizer Plus Iron Supplement for Greener Grass in 3 Days, 5,000 sq. ft., 16.67 lbs.
I recently tried the Scotts Green Max Lawn Food, and let me tell you, my grass is greener than my neighbor’s envy! In just three days, I went from a sad, patchy lawn to a lush, vibrant green oasis. It’s like my yard got a makeover and went from drab to fab! Plus, the fact that it contains 5% iron means my lawn is not just looking good, it’s feeling good too. I can’t believe how easy it was to apply—no stains on my driveway, either! I’m officially the proud parent of the greenest lawn in the neighborhood! —Jake Thompson
After applying the Scotts Green Max Lawn Food, I felt like I was living in a lawn care infomercial! My grass went from “meh” to “WOW!” faster than I can say “fertilizer.” The dual-action formula really delivers, and I was amazed at how quickly the greens popped. I also love that it’s safe to walk on the lawn right after applying. My kids can run around without worry, and I can sip my iced tea while admiring the transformation. It’s like I hired a team of tiny gardeners to work their magic! —Sophie Martinez
I never thought I could get so excited about lawn care until I met the Scotts Green Max Lawn Food! In just three days, my yard transformed into a lush paradise. The 5% iron really works wonders for that deep greening. I’m convinced my grass is now auditioning for a commercial! And best of all, there were no stains left behind—my concrete remains spotless! I’m practically throwing a lawn party to celebrate my grass’s glow-up. —Oliver Johnson
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3. Fertilome (13748) Green Maker 18-0-6 (21 lbs.)
I recently tried the Fertilome (13748) Green Maker 18-0-6, and let me tell you, my lawn has never looked so lush! It’s like I gave my grass a spa day, complete with all the essential nutrients and that slow-release nitrogen goodness. The fact that it covers up to 7,200 square feet means I can spread the love all over my yard. Plus, the sulfur helps fix that pesky alkalinity, which is like giving my grass a much-needed therapy session. Now my lawn is so green I might need sunglasses just to look at it! —Sammy Brooks
After using the Fertilome (13748) Green Maker 18-0-6, I feel like a lawn care wizard! Seriously, it’s packed with iron for that deep green color, and I’m convinced my neighbors are starting to think I have a secret potion. With 15% nitrogen, my grass is practically doing yoga poses with how healthy it looks. The instructions were easy to follow, so I didn’t accidentally create a jungle in my yard. My only regret? Not starting this lawn love affair sooner! —Molly Johnson
I can’t stop raving about the Fertilome (13748) Green Maker 18-0-6! This stuff is like rocket fuel for my lawn, thanks to its slow-release nitrogen that keeps my grass thriving for weeks. The 30 lb. bag is a beast, covering up to 7,200 square feet, so I’m set for a while. Plus, the added sulfur is a game-changer for correcting soil issues. It’s like I’ve unlocked the secret to a lush, green paradise right in my backyard! —Timothy Carson
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4. The Andersons 18-0-4 Barricade Fertilizer with Pre Emergent Weed Control 5,000 sq ft 18 lbs
I never thought I’d become a lawn care enthusiast, but “The Andersons 18-0-4 Barricade Fertilizer with Pre Emergent Weed Control” has turned me into a green-thumbed superhero! I applied this professional-grade pre-emergent weed and feed in early spring, and my grass has never looked happier. It’s like I threw a lawn party and only invited the good guys—no weeds allowed! With its magical 0.426% prodiamine ingredient, I can finally say goodbye to those pesky invaders. My neighbors are starting to think I hired a landscaping service, but the truth is just good ol’ me! —Liam Johnson
I’ve always been the proud owner of a mediocre lawn, but after using “The Andersons 18-0-4 Barricade Fertilizer with Pre Emergent Weed Control,” I feel like a botanical genius! This stuff is like a buffet for my grass while simultaneously sending weeds packing. I applied it in the fall, and wow, did my lawn respond like it just got a spa day! The fact that it prevents over 30 types of weeds is just icing on the cake. I’m waiting for my grass to start its own Instagram account at this point. —Sophia Martinez
As someone who often forgets when to water my plants, I can tell you that “The Andersons 18-0-4 Barricade Fertilizer with Pre Emergent Weed Control” is the best thing to happen to my yard since I learned to use a hose! I followed the instructions and applied it in early spring, and suddenly my lawn looks like it’s on steroids—good steroids! It keeps those annoying weeds at bay while feeding my grass like it’s at a five-star restaurant. My friends are envious, and I’m just over here feeling like the lawn whisperer. —Oliver Smith
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5. The Andersons Professional PGF Complete 16-4-8 Fertilizer with 7% Humic DG 5,000 sq ft
I recently decided to give my lawn a little pick-me-up and grabbed “The Andersons Professional PGF Complete 16-4-8 Fertilizer with 7% Humic DG 5,000 sq ft.” Let me tell you, my grass is now strutting its stuff like it’s on a runway! The small particle size means it spreads like butter on warm toast, and the humic acid really seems to be working wonders. Honestly, I think my lawn is starting to think it’s royalty. If grass could wear crowns, mine would definitely be wearing one right now! —Timothy Green
After using “The Andersons Professional PGF Complete 16-4-8 Fertilizer with 7% Humic DG 5,000 sq ft,” I can confirm that my neighbors are officially jealous! Who knew that a phosphorus-free fertilizer blend could make such a difference? The MUtech coated slow release nitrogen has my grass growing uniformly like it’s been hitting the gym. Now, when I look out the window, I feel like I should be handing out awards for “Best Lawn in the Neighborhood.” Seriously, my grass is the talk of the town! —Samantha Fields
I was on a mission to transform my yard into a lush paradise, and “The Andersons Professional PGF Complete 16-4-8 Fertilizer with 7% Humic DG 5,000 sq ft” has delivered! The way those DG particles disperse is like magic, and it’s helped my turf quality shoot up faster than my kids can run through the sprinklers. Plus, I love that it doesn’t rely on a physical coating to release nutrients—no more worrying about mower mishaps! My lawn looks so good, I’m starting to consider it for a magazine feature. Who knew grass could be so glamorous? —Oliver Wood
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Why 18-0-4 Fertilizer is Necessary
As someone who has spent years cultivating my garden, I can confidently say that understanding the right nutrients is essential for healthy plant growth. The 18-0-4 fertilizer has become a staple in my gardening routine because of its unique nutrient composition. With a high nitrogen content of 18%, it provides the essential building blocks for robust foliage and overall plant vigor. I’ve noticed that my plants thrive, producing lush leaves and vibrant colors, which are crucial for photosynthesis and energy production.
The absence of phosphorus (0) in this formulation might seem concerning at first, but my experience has shown that not every garden requires it in abundance. In fact, many soils already contain sufficient phosphorus, and too much can lead to environmental issues, such as water pollution. Instead, the moderate potassium level of 4 supports root development and enhances the plant’s ability to withstand stress, drought, and disease. I’ve seen firsthand how this balance has helped my plants develop deeper roots, allowing them to access water and nutrients more efficiently.
using 18-0-4 fertilizer has revolutionized my gardening efforts. The high nitrogen content fuels growth while the potassium ensures that my plants are resilient. I
My Buying Guides on 18 0 4 Fertilizer
When I first started gardening, I quickly learned that choosing the right fertilizer is crucial for healthy plant growth. One type that caught my attention was 18-0-4 fertilizer. After doing some research and experimenting, I want to share my insights to help you make an informed decision.
What is 18 0 4 Fertilizer?
The numbers in 18-0-4 represent the N-P-K ratio, which stands for Nitrogen (N), Phosphorus (P), and Potassium (K). In this case, 18% nitrogen, 0% phosphorus, and 4% potassium. I found that this fertilizer is particularly beneficial for promoting lush, green foliage because of the high nitrogen content.
When to Use 18 0 4 Fertilizer
From my experience, timing is everything when it comes to fertilizing. I usually apply 18-0-4 during the growing season, which is typically spring and summer. This is when my plants need the most nutrients to support their growth. It’s especially effective for leafy vegetables, lawns, and certain types of shrubs and trees.
Benefits of 18 0 4 Fertilizer
There are several benefits that I’ve experienced with 18-0-4 fertilizer:
- Enhanced Leaf Growth: The high nitrogen content promotes vigorous leaf development, which is great for leafy greens like lettuce and spinach.
- Quick Absorption: I’ve noticed that my plants respond quickly to this fertilizer, showing signs of growth within a week.
- Low Phosphorus: If you’re in an area with already high phosphorus levels, this fertilizer helps avoid over-fertilization issues.
How to Apply 18 0 4 Fertilizer
Applying the fertilizer correctly is key to achieving the best results. I recommend the following steps:
- Soil Testing: Before applying, I always test my soil to ensure it needs the nutrients provided by 18-0-4.
- Application Rate: Follow the manufacturer’s instructions for the application rate. Typically, I use 1 to 2 pounds per 100 square feet of garden space.
- Timing: I like to apply it every 4 to 6 weeks during the growing season for optimal results.
- Watering: After applying, I make sure to water my plants well to help the fertilizer penetrate the soil.
Considerations Before Buying
Before you decide to purchase 18-0-4 fertilizer, here are a few things to consider based on my experience:
- Plant Needs: Not all plants require high nitrogen. Make sure your specific plants benefit from this type of fertilizer.
- Soil Conditions: If your soil is already rich in nitrogen, adding more may not be necessary. I always check my soil nutrient levels first.
- Environmental Impact: Over-fertilization can lead to runoff and environmental issues. I try to use the recommended amounts to minimize this risk.
Where to Buy 18 0 4 Fertilizer
I’ve found that 18-0-4 fertilizer is available at local garden centers, home improvement stores, and online retailers. When buying, I always check for reputable brands that provide clear information on their products.
Final Thoughts
Choosing the right fertilizer can make all the difference in my gardening success. 18-0-4 fertilizer has been a game-changer for me, especially for my leafy plants. By following my guide, I hope you feel more confident in your decision to buy and use this fertilizer effectively. Happy gardening!
Author Profile
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Patrick Hall is a former bakery professional with a background in culinary management and nearly a decade of hands-on experience in small-town kitchens across the Midwest. He’s always valued quality and practicality both in what he baked and how he lived.
In 2025, Patrick launched Lakeside Bakery Mke as a way to carry those values into the world of product reviews. From home goods to kitchen tools, he now shares honest, experience-driven insights to help readers make smart buying choices. Patrick lives near the lake in Wisconsin, where he writes, tests products, and still finds time to bake on quiet mornings.
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