Top 5 Nitrogen Fertilizers: A Lawn Care Guide

Imagine a lawn so green it looks like a velvet carpet. You see those perfect yards, and you wonder, “What is their secret?” The answer often lies in a simple element: nitrogen. Nitrogen is like super-food for your grass. It fuels the vibrant green color and thick, healthy growth we all desire.

However, choosing the right nitrogen for your lawn can feel like navigating a maze. Should you pick quick-release or slow-release? What do those numbers on the fertilizer bag even mean? Many homeowners worry about burning their grass or wasting money on products that don’t deliver results. Getting the balance wrong leads to patchy, pale, or overly bushy grass that needs constant cutting.

This guide cuts through the confusion. We will break down exactly what nitrogen does and show you the best types available. By the end of this post, you will know precisely which fertilizer formula fits your lawn’s needs. Get ready to unlock the secrets to a consistently stunning, emerald-green yard!

Top Nitrogen For Lawns Recommendations

No. 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)
  • Easy to Use: Our 28-0-0 Lawn Fertilizer Food comes with an attached sprayer that applies the perfect ratio of product for lawn applications. Covers up to 3,200 square feet, when using the attached sprayer
  • Liquid Fertilizer 28-0-0 contains 28% Nitrogen. Nitrogen is a major component of chlorophyll where lawns get their green coloring. Nitrogen encourages growth for a dense attractive lawn
  • The Power of Quick Release and Slow Release Nitrogen Fertilizer: 70% quick-release nitrogen to provide quick nutrient absorption 30% slow-release nitrogen keeps your lawn fed in between applications
  • Can Be Used on All Grass types: Including Bermuda, St. Augustine, Zoysia, Buffalo, Centipede, Florida Palmetto, Bahia, Fescue, Ryegrass & Kentucky Bluegrass.
  • High Nitrogen Formula: This High Nitrogen fertilizer was developed to perk up the lawn, by quickly correcting a Nitrogen deficiency. Nitrogen Encourages Greening & Growth if a nutrient deficiency is present
No. 2
Pennington Full Season Lawn Fertilizer 32-0-5 4M 11.2lb
  • One application and done for a season
  • Contains natural beneficial microorganisms that revitalize soil
  • Contains 5% iron for deep greening
  • Contains polymer coated urea that slowly releases nitrogen up to 4 months
  • Product not available in Hawaii and South Dakota
No. 3
Scotts Turf Builder Lawn Food - Fertilizer for All Grass Types, 5,000 sq. ft., 12.5 lbs.
  • Scotts Turf Builder Lawn Food feeds and strengthens grass to help protect against future problems
  • Fertilizer builds strong, deep roots and improves the lawn's ability to absorb water and nutrients (vs. unfed lawn)
  • Apply lawn care product to a wet or dry lawn
  • Grass fertilizer works on any grass type
  • One 12.5 lb. bag of Scotts Turf Builder Lawn Food covers 5,000 sq. ft.
No. 4
Maximum Green & Growth- High Nitrogen 28-0-0 NPK- Lawn Food Quality Liquid Fertilizer- Spring & Summer- Any Grass Type- Simple Lawn Solutions - Concentrated Quick & Slow Release Blend (1 Quart)
  • 28-0-0 Liquid Lawn Food Nutritional Supplement: High Nitrogen Formula. Nitrogen aids in the formation of chlorophyll where plants get their green coloring. The addition of Nitrogen encourages vigorous growth for the development of a dense attractive lawn.
  • The Power of Quick Release and Slow Release Nitrogen Fertilizer: 70% quick-release nitrogen to provide quick nutrient absorption 30% slow-release nitrogen keeps your lawn feed in-between applications.
  • 28-0-0 contains 28% Nitrogen. Nitrogen is a major component of chlorophyll where plants get their green coloring. Nitrogen encourages vigorous growth for the development of a dense attractive lawn.
  • Can Be Used on All Grass types: Including Bermuda, St. Augustine, Zoysia, Buffalo, Centipede, Florida Palmetto, Bahia, Fescue, Ryegrass & Kentucky Bluegrass.
  • Application Rates for Lawn, Garden and Indoor Plants: Versatile Formula can be used on turf grass, ornamentals, young plants, flower beds, potting soil, young trees, garden and hardy plants.
No. 5
Milorganite All-Purpose Eco-Friendly Slow-Release Nitrogen 6-4-0 Fertilizer, 32 lb Bag - for Lawns, Flowers, and Gardens - Includes Bonus Feeding & Spreader Tips Brochure
  • Bonus brochure includes seasonal application timing, spreader settings, and tips for lawns, gardens, and trees.
  • You don’t have to worry about streaks, stripes, or accidentally burning your lawn when you use Milorganite fertilizer!
  • Milorganite contains virtually no salts, so it won’t burn your lawn, trees, shrubs, or plants, even in the hottest temperatures or driest conditions.
  • Milorganite's iron greens without staining. Grass needs iron for the long-lasting, deep, vibrant green lawn you want. Milorganite delivers organically complex iron throughout the feeding period and won’t stain concrete, unlike iron salts in some synthetic fertilizers.
  • Milorganite’s slow-release plant food formula provides nitrogen and other nutrients for up to 8-10 weeks after application and does not need to be watered in. Covers 2,500 Sq. Ft.
No. 6
The Andersons Professional Pure Nitrogen 32-0-0 Fertilizer - 18lbs Covers 6,000 sqft.
  • Ideal for lawns with nitrogen deficiencies
  • Contains both quick- and slow-release nitrogen
  • Can be used any time during the growing season
  • Small particle size for complete and uniform coverage
  • Safe for all turf types
No. 7
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)
  • Pure Nitrogen Fertilizer: With a potent 46% urea nitrogen content, our fertilizer serves as a vital component for plant health. It supports essential processes like protein synthesis and the production of green color essential ensuring optimal growth and development.
  • Bountiful Harvests: Elevate your garden's productivity with our urea fertilizer for grass. Not only for larger, but more abundant flowers, fruits, and vegetables and also promotes plant growth overall.
  • Plant Growth: Witness your plants thrive as our urea grass fretilizer accelerates growth. By providing a balanced ingredients, this ensures a consistent display of vibrant foliage, stronger stems, and roots.
  • Versatile Application: Suitable for a wide range of crops, vegetables, and fruits, our urea lawn fertilizer makes various cultivation methods. Whether you're a professional farmer or a passionate gardener, our versatile fertilizer caters agricultural needs.
  • Soil Enrichment: Contribute to balanced soil structure indirectly by nurturing plants with. Beyond promoting plant growth, our urea lawn food fertilizer encourages the development of root systems that is for soil aggregation and mitigate erosion. New Look Alert! Our white packaging is now blue packaging with a grass design.
No. 8
Scotts Green Max Lawn Food, Lawn Fertilizer Plus Iron Supplement for Greener Grass in 3 Days, 5,000 sq. ft., 16.67 lbs.
  • Scotts Green Max Lawn Food is a dual-action fertilizer and iron formula that feeds your lawn and provides deep greening in just 3 days
  • This lawn care product contains 5% iron, a micronutrient that enhances the greening process for fast results
  • Apply this fertilizer plus iron supplement to any grass type in the spring, summer, or fall
  • Guaranteed not to stain concrete, driveways, or other surfaces surrounding your lawn (when used as directed)
  • One 16.67 lb. bag of Scotts Green Max Lawn Food covers 5,000 sq. ft.

Your Green Lawn Secret: A Guide to Buying Nitrogen for Lawns

Want a lawn that looks like a carpet? Nitrogen is the magic ingredient. It makes grass blades grow strong and deep green. Buying the right nitrogen product can be tricky. This guide helps you pick the best one for your yard.

Key Features to Look For

When shopping for lawn nitrogen, look closely at the bag or container. These features matter most:

  • **Nitrogen Percentage (N-P-K Ratio):** You will see three numbers on the bag, like 20-5-10. The first number is the percentage of Nitrogen (N). For a quick green-up, look for a higher first number (like 25 or more).
  • **Slow-Release vs. Quick-Release:** This is very important. Quick-release nitrogen works fast but wears off quickly. Slow-release nitrogen feeds your lawn slowly over weeks or months. Slow-release is usually better because it prevents “burning” your grass and keeps the color steady.
  • **Formulation Type:** Nitrogen comes in different forms. Look for products that use sulfur-coated urea or polymer-coated urea for slow feeding.

Important Materials in Lawn Fertilizers

Nitrogen is the star, but other things help your lawn grow well. Lawn fertilizers use the N-P-K system:

  • **N (Nitrogen):** Makes the grass blades green and lush. This is what you are mainly buying.
  • **P (Phosphorus):** Helps roots grow deep and strong, especially important for new lawns or sod.
  • **K (Potassium):** Helps the grass fight off stress, like drought or disease.

Tip: Most established lawns need more N than P and K. A ratio like 30-0-5 is common for pure nitrogen feeding.

Factors That Improve or Reduce Quality

The quality of your nitrogen product affects how long your lawn stays green and how healthy it is.

What Improves Quality:
  • **Polymer Coating:** High-quality slow-release products often use polymer coatings. These coatings control exactly when the nitrogen releases based on soil temperature and moisture. This gives you longer-lasting results.
  • **Micronutrients:** Some premium fertilizers include iron or magnesium. Iron helps deepen the green color without forcing too much fast growth.
What Reduces Quality (Watch Outs):
  • **Too Much Quick-Release Nitrogen:** If the product is mostly quick-release (like ammonium sulfate), your grass might get a huge burst of green, but it will quickly turn pale yellow a few weeks later. This forces you to mow more often, too!
  • **Improper Granule Size:** If the granules are too dusty or too large, they won’t spread evenly. Uneven spreading leads to stripes of dark green next to pale areas.

User Experience and Use Cases

How you use the nitrogen product changes what you should buy.

For Quick Fixes (Spot Treatment)

If your lawn looks pale right before a party, you might need a quick boost. Look for products labeled “Water Soluble” or high in urea. You mix these with water and spray them on. They work within days, but you must reapply sooner.

For Seasonal Feeding (The Best Approach)

Most homeowners benefit most from slow-release granular products. You spread these with a spreader, usually 3 to 4 times per year (Spring, Late Spring, Early Fall, Late Fall). This provides steady, predictable feeding. The experience is low-effort because you don’t have to fertilize weekly.

Safety Note: Always read the bag instructions about when to water after application. Water washes the nutrients into the soil. If you skip watering after applying granular fertilizer, you risk burning your lawn.


10 Frequently Asked Questions (FAQ) About Lawn Nitrogen

Q: What is the best time of year to apply nitrogen?

A: Early spring wakes the lawn up. Late spring feeds the summer growth. Early fall helps the grass recover and store energy for winter. Avoid heavy nitrogen in the peak heat of summer unless your grass is a warm-season variety.

Q: Will nitrogen make my grass grow too fast?

A: Quick-release nitrogen makes grass grow very fast, meaning you mow constantly. Slow-release nitrogen provides steady growth that is easier to manage.

Q: Can I use garden fertilizer on my lawn?

A: You can, but lawn fertilizers are specially balanced. Lawn nitrogen products usually have much less Phosphorus (P) because established turfgrass doesn’t need much root development help.

Q: What does “scorching” or “burning” mean?

A: Burning happens when too much quick-release nitrogen sits directly on the grass blades without enough water to dissolve it. It dries out the grass, turning it brown or white.

Q: How much nitrogen do I need per 1,000 square feet?

A: A good general goal is to apply about 1 pound of actual nitrogen per 1,000 square feet in a single application. Check the bag to see how many pounds of product equals 1 pound of N.

Q: Is liquid nitrogen better than granular nitrogen?

A: Liquid works faster, but granular (slow-release) lasts much longer. For routine feeding, granular is usually more convenient and cost-effective.

Q: Does nitrogen help kill weeds?

A: No. Nitrogen only feeds grass. You need a separate “weed and feed” product if you want to control weeds at the same time.

Q: Should I use slow-release nitrogen if I have sandy soil?

A: Yes, absolutely. Sandy soil lets water and nutrients pass through quickly. Slow-release products are crucial to keep the nitrogen from washing away before the grass can use it.

Q: Can I mix different types of fertilizer?

A: It is safest not to mix products unless the instructions specifically say you can. You might accidentally over-apply one nutrient.

Q: What is the ideal color for grass after fertilizing?

A: Grass should turn a deep, rich emerald green. If it looks yellow or lime-green, it needs more nitrogen or iron. If it looks dark bluish-green and floppy, it might have too much nitrogen.