The Best Nitrogen Fertilizer for Lawns: A Practical Guide to Greener Grass

Your lawn looks tired. It’s thinning in spots, the color is more beige than green, and no amount of watering seems to help. A nitrogen deficiency is the most common cause, and it’s the one nutrient grass needs in the largest quantity.

Choosing the right nitrogen fertilizer comes down to three things: how fast you want results, whether you prefer granular or liquid, and how much area you need to cover. A 46-0-0 urea gives you the most nitrogen per pound, while a slow-release blend feeds gradually over weeks. Liquid formulas green up fast but need more frequent reapplication.

We looked at five options that cover the full range, from a 50-pound bag of pure urea to a hose-end sprayer that feeds 3,200 square feet. The CountryMax urea is the best value for large properties. Scotts Green Max is the fastest way to fix a patchy lawn. Keep reading for the full breakdown.

Here’s a quick side-by-side look at how these five fertilizers compare on the specs that matter most.

Features	CountryMax Urea	Scotts Turf Builder	Simple Lawn Solutions	Scotts Green Max	Supply Solutions Urea
Nitrogen Content	46%	Not specified	28%	Not specified	46%
Form	Granular	Granular	Liquid spray	Granular	Granular
Coverage	50 lb bag	12.5 lb bag	3,200 sq ft	16.67 lb bag	5 lb bag
Release Type	Quick release	Slow release	70% quick, 30% slow	Dual-action with iron	Quick release
Best Use Case	Large lawns, value	All-purpose feeding	Fast liquid greening	Rapid color fix	Small gardens, pots

CountryMax 50LB Urea Fert

This is a no-frills, high-nitrogen granular fertilizer in a 50-pound bag. It’s for homeowners with big lawns, landscapers, or anyone who wants the most nitrogen per dollar. If your grass is pale and needs a serious push, this delivers.

The 46-0-0 formula is the strongest nitrogen concentration you can buy in a single product. That means less product per square foot compared to a 10-10-10 or 20-5-10 blend. The granules spread evenly through a broadcast or drop spreader, so you get consistent coverage without streaks. One bag goes a long way on a half-acre or larger lot.

Urea is fast-acting. You’ll see greening within a week, but it doesn’t last as long as slow-release formulas. You’ll need to reapply every 6 to 8 weeks during the growing season. It also has no phosphorus or potassium, so it won’t fix deficiencies in those nutrients. And because it’s pure nitrogen, you have to be careful with the application rate. Too much will burn the lawn.

• 46% nitrogen is the highest concentration available in a granular product
• 50-pound bag covers a large area, making it economical for big properties
• Works with any standard broadcast or drop spreader
• Fast green-up but requires more frequent reapplication
• No phosphorus or potassium, so it’s not a complete fertilizer

Best for: Homeowners with large lawns who want a cost-effective, high-nitrogen boost and don’t mind reapplying every few weeks.

Scotts Turf Builder Lawn

Scotts Turf Builder is the familiar yellow-bag fertilizer you’ve seen at every garden center. It’s a balanced, slow-release granular product designed for routine feeding on any grass type. It’s the safe pick for someone who wants a simple, reliable schedule without measuring exact nitrogen ratios.

The slow-release nitrogen feeds the lawn gradually, so you get steady growth instead of a sudden flush. That also means less risk of burning. The formula builds stronger roots, which helps the grass handle drought and heat stress better. You can apply it to a wet or dry lawn in spring, summer, or fall, so timing is flexible.

The trade-off is that you don’t know the exact NPK ratio from the product data. It’s a general-purpose lawn food, not a targeted nitrogen fix. If your soil is already balanced, this works fine. If you need a specific nitrogen boost, a higher-analysis product like urea will be more direct. The 12.5-pound bag is also on the smaller side for big lawns.

• Slow-release nitrogen feeds grass gradually over time
• Builds deeper roots for better drought tolerance
• Safe for all grass types and flexible application timing
• Pesticide-free formula
• Smaller bag size means less coverage per purchase

Best for: Homeowners who want a simple, all-purpose lawn food for regular seasonal feeding without worrying about burn risk.

Maximum Green & Growth Fe

Simple Lawn Solutions makes a liquid nitrogen fertilizer that attaches directly to your hose. It’s for anyone who wants fast results without hauling a spreader around. The 32-ounce bottle covers up to 3,200 square feet, which is perfect for a typical suburban front or back yard.

The 28-0-0 formula is a blend of quick-release and slow-release nitrogen. About 70% of it gets absorbed fast for a quick green-up, while the remaining 30% keeps feeding the lawn between applications. The attached sprayer mixes the product at the right ratio automatically, so you don’t have to measure anything. It works on every common grass type, from Bermuda to fescue.

Liquid fertilizer doesn’t last as long as granular in the soil. You’ll need to reapply every 4 to 6 weeks during peak growing season. The bottle also only covers 3,200 square feet, so a large property would need multiple bottles. And if you have a lot of square footage, the cost per application adds up faster than a 50-pound bag of urea.

• Hose-end sprayer applies the correct ratio automatically
• 28% nitrogen with both quick and slow release
• Covers up to 3,200 square feet per bottle
• Safe for all grass types including St. Augustine and Zoysia
• Requires more frequent reapplication than granular

Best for: Homeowners with small to medium yards who want a fast, easy liquid application without a spreader.

Scotts Green Max Lawn Foo

Green Max is Scotts’ answer to a lawn that needs color fast. It’s a dual-action granular fertilizer with added iron. The iron supplements the nitrogen to deepen the green without pushing excessive top growth. It’s for anyone who wants a quick visual fix before a party, open house, or just because the lawn looks sad.

The big selling point is speed. Scotts says you’ll see deep greening in three days. That’s much faster than standard slow-release fertilizers. The iron also helps the color without staining concrete or driveways when you apply it as directed. You can re-enter the lawn immediately after application, which is handy if you have kids or pets.

This isn’t a high-nitrogen product in the 46-0-0 sense. It’s a balanced feed with iron for color. If your lawn is severely nitrogen-deficient, you may need a stronger formula first. It’s also not sold in Florida, so if you live there, you’ll need a different option. And like most Scotts products, the bag size is moderate, so large lawns will need multiple bags.

• Deep greening in as little as three days
• Dual-action formula feeds and supplements with iron
• Guaranteed not to stain when used as directed
• Safe for all grass types and immediate lawn re-entry
• Not available in Florida

Best for: Homeowners who need a fast color fix and want the added benefit of iron for deeper green without excessive growth.

Supply Solutions Urea 46-

Supply Solutions sells a 5-pound bag of urea with the same 46-0-0 analysis as the CountryMax product, just in a much smaller size. It’s for gardeners with small lawns, flower beds, or container plants who don’t want to store a 50-pound bag. The packaging recently changed from white to blue with a grass design.

The high nitrogen content supports protein synthesis and chlorophyll production, which is what gives plants their green color. It’s versatile enough for lawns, vegetables, fruits, and ornamentals. The small bag is easy to handle and store, and it’s a good way to try urea without committing to a huge sack. It also promotes root development, which helps with soil structure over time.

The main drawback is the size. Five pounds doesn’t cover much lawn. If you have more than a few hundred square feet of grass, you’ll burn through this quickly. It’s also pure quick-release nitrogen, so it doesn’t last long in the soil. You’ll need to reapply often, and the cost per pound is higher than buying a 50-pound bag.

• 46% urea nitrogen for rapid green-up
• Small 5-pound bag is easy to store and handle
• Works on lawns, gardens, flowers, and vegetables
• Supports root development and soil aggregation
• Higher cost per pound than bulk urea

Best for: Gardeners with small lawns or mixed plantings who want a manageable amount of high-nitrogen fertilizer.

How We Chose These Products

We focused on nitrogen content, release speed, coverage, and application method. A fertilizer that’s hard to spread or easy to burn won’t help anyone. We also looked at whether the product data gave clear application rates and grass-type compatibility.

We avoided products with vague formulas or missing coverage information. The five here all have enough detail to make an informed decision. We also considered the trade-off between fast greening and long-lasting feeding. No single product wins on every metric, so we picked options that cover different needs and budgets.

Buying Guide: What Really Matters

The first number in an NPK ratio is nitrogen. A 46-0-0 product is 46% nitrogen by weight. That’s the highest you’ll find. A 28-0-0 liquid is 28% nitrogen. The higher the number, the less product you need per square foot, but the higher the burn risk if you overapply.

Quick-release nitrogen greens up fast but leaches away quickly. Slow-release nitrogen feeds over weeks and is safer for beginners. Many products blend both. If you want fast results and don’t mind reapplying, go with quick-release. If you want a set-it-and-forget-it approach, choose slow-release.

Granular is easier to spread evenly over large areas. Liquid is faster to apply and works well for small yards. Check the coverage area on the bag or bottle. A 50-pound bag of urea covers far more than a 5-pound bag or a 32-ounce liquid bottle. Match the product size to your lawn’s square footage so you don’t buy too little or too much.

Our Top Recommendation

CountryMax 50LB Urea Fertilizer is the best overall pick for most homeowners with a large lawn. It delivers the highest nitrogen concentration, covers a huge area, and costs less per pound than any other option here. The fast green-up is impressive, and it works with any standard spreader.

If you have a small yard, the Simple Lawn Solutions liquid fertilizer is easier to handle and applies in minutes. For a fast color fix without mixing or measuring, Scotts Green Max is the quickest route to a greener lawn. And if you just need a small amount for garden beds, Supply Solutions urea is a practical choice.

Frequently Asked Questions

How often should I apply nitrogen fertilizer to my lawn?

Most lawns need nitrogen every 6 to 8 weeks during the growing season. Quick-release products like urea break down faster, so you may need to reapply every 4 to 6 weeks. Slow-release formulas can stretch to 8 to 10 weeks. Stop feeding when the grass goes dormant in summer heat or winter cold.

Can I apply urea fertilizer to a wet lawn?

Yes, but it’s better to apply to a dry lawn and then water it in. Urea is highly soluble, so if the grass is already wet, the granules may stick to the blades and cause burn spots. Watering after application moves the nitrogen down to the soil where roots can use it.

Will high-nitrogen fertilizer burn my grass?

It can if you apply too much or spread it unevenly. Urea is especially prone to burn because it’s pure nitrogen. Follow the bag’s application rate exactly and use a spreader with a consistent setting. If you’re unsure, apply half the recommended amount and wait a week to see how the lawn responds.

What’s the difference between urea and a slow-release lawn fertilizer?

Urea is a quick-release nitrogen source. It dissolves fast and gives the lawn an almost immediate green-up, but the effect fades in a few weeks. Slow-release fertilizers are coated or formulated to break down gradually, feeding the lawn steadily over a longer period. Many products combine both types for fast and lasting results.