Specs are compiled from manufacturer listings and verified buyer reviews and can change over time — please confirm the key details on the product page before buying.
Yellow grass is almost always a nitrogen problem — either the soil is short on it, or the grass cannot absorb what is there. The right fertilizer puts that nitrogen back fast, turns the color around within days, and keeps the lawn thick enough to crowd out weeds. This guide cuts through the bag labels to find the exact formula that fixes yellow and prevents it from coming back.
I’m Rikta — the founder and writer behind Lawn Gear Lab. This guide is built by comparing the manufacturers’ published specifications and the patterns across verified customer reviews, so you get each pick’s real strengths and trade-offs instead of marketing spin.
Whether you are fighting a sudden yellow patch or a whole yard that looks pale and tired, the best fertilizer for yellow grass delivers high nitrogen in a form the turf can use immediately while feeding the soil for steady green growth all season.
Quick Picks
- Yard Mastery 24-0-6 Flagship Granular Lawn Fertilizer (45 lb) — Best Overall
- The Andersons Professional PGF 16-0-8 Fertilizer with Humic DG (18 lb) — Precision Spreader
- Petramax Liquid Nitrogen Fertilizer 28-0-0 NPK (32 oz) — Fast Liquid Fix
- Pennington Full Season Lawn Fertilizer 32-0-5 (11.2 lb) — One & Done
- GreenView Fairway Formula Lawn Fertilizer 27-0-5 (16.5 lb) — Budget Granular
- Supply Solutions Urea 46-0-0 Nitrogen Fertilizer (5 lb) — Nitrogen Powerhouse
- Yard Mastery 16-0-0 Double Dark Granular Lawn Fertilizer with 6% Iron (45 lb) — Green-Only Growth
How To Choose The Best Fertilizer For Yellow Grass
The first thing to understand is that yellow grass is almost always a nitrogen deficiency signal. The right fertilizer reverses that in days, but the wrong one either burns the lawn or takes too long to work. Here are the three specs that matter most.
Nitrogen Content and Release Type
Look at the first number in the NPK (nitrogen-phosphorus-potassium) ratio — that is the nitrogen percentage. A number in the mid-20s or higher (like 27-0-5 or 32-0-5) packs enough nitrogen to turn yellow grass green fast. But nitrogen releases in two speeds: quick-release (works within days but can burn if overdone) and slow-release (feeds steadily for weeks but takes longer to show color). The best formulas mix both, so you get immediate green-up and a lasting feed.
Iron for Color
Iron does not fix yellow grass caused by nitrogen deficiency, but it deepens the green dramatically once the nitrogen is in place. Fertilizers with added iron, like 3% or 5% iron content, give that dark, rich lawn color that looks healthy rather than just “not yellow.” If your soil already has enough iron, skip it — but for most yellow lawns, a fertilizer with iron accelerates the visual turnaround.
Coverage and Bag Size
Granular fertilizers list the square footage each bag covers. A 16.5-pound bag covering 5,000 sq ft works for a medium lawn, while a 45-pound bag covering 15,000 sq ft is designed for larger properties. Liquid fertilizers are measured by fluid ounces and the dilution ratio. Match the coverage to your actual lawn size to avoid running out mid-application or over-applying and burning the turf.
Quick Comparison
| Model | Best For | NPK Ratio | Coverage | Item Weight | Amazon |
|---|---|---|---|---|---|
| Yard Mastery 24-0-6 Flagship | Overall value & slow-release | 24-0-6 | 15,000 sq ft | 45 Pounds | Amazon |
| The Andersons PGF 16-0-8 | Precision spreading | 16-0-8 | 10,000 sq ft | 18 Pounds | Amazon |
| Petramax Liquid Nitrogen 28-0-0 | Fast liquid fix | 28-0-0 | 12,800 sq ft (maintenance) | 32 Ounces | Amazon |
| Pennington Full Season 32-0-5 | Single application | 32-0-5 | 4,000 sq ft | 11.2 Pounds | Amazon |
| GreenView Fairway Formula 27-0-5 | Budget-friendly granular | 27-0-5 | 5,000 sq ft | 16.5 Pounds | Amazon |
| Supply Solutions Urea 46-0-0 | Nitrogen-only boost | 46-0-0 | Turf: 1/5lb per 1000 sq ft | 5 Pounds | Amazon |
| 16-0-0 Double Dark (Yard Mastery) | Greening without growth surge | 16-0-0 plus 6% iron | 15,000 sq ft | 45 Pounds | Amazon |
In‑Depth Reviews
1. Yard Mastery 24-0-6 Flagship Granular Lawn Fertilizer (45 lb)
The heavy-lifter that feeds yellow grass back to green for a full season on one spread.
This 45-pound bag covers 15,000 sq ft, making it the most efficient single-bag option for anyone with a larger lawn who hates reapplying every few weeks. The 24-0-6 ratio gives you 24% slow release nitrogen, so the green-up starts within days but keeps working without the surge-and-fade cycle that drives homeowners crazy. Unlike the Pennington 32-0-5 that covers only 4,000 sq ft, this bag handles nearly four times the area per bag.
The 3% iron and Bio-Nite additive (a soil conditioner) work together to darken the green beyond what nitrogen alone can do. With 6% potassium in the mix, the lawn also builds drought resistance — a real help during hot summer spells when yellow often returns. It weighs 45 pounds, which is noticeably heavier than the 18-pound The Andersons PGF 16-0-8 bag, so you carry more upfront but spread fewer times across the season.
what separates it
- 24% slow release nitrogen keeps feeding steadily — no quick green followed by crash
- 3% iron and Bio-Nite boost color and soil health together
- 45 lbs covers 15,000 sq ft, minimizing trips to the shed
The practical trade-off
- Heavy bag at 45 pounds — not ideal for carrying across a very large property without a spreader
- Premium pricing compared to smaller granular options like GreenView (based on buyer reports)
The clear call: Reach for this if you have a medium-to-large lawn and want one fertilizer that covers spring through fall with minimal reapplication.
The catch: If you need a very fast green-up in under a week, the slow-release component may be too gradual — a liquid nitrogen like Petramax would act faster.
2. The Andersons Professional PGF 16-0-8 Fertilizer with Humic DG (18 lb)
Super-fine granules that spread twice as evenly as standard lawn fertilizers.
The Andersons uses a unique particle size — super-fine particles provide even distribution, with twice the number of particles per square foot. This means you get fewer streaks and stripes across the lawn, a common frustration with chunkier granular fertilizers. The 16-0-8 ratio includes quick- and slow-release nitrogen that feeds for up to 8 weeks, plus iron and micronutrients (tiny nutrients the grass needs in small amounts) for total nutrition. Buyers report it “dramatically improved lawn quality (greener, healthier)” — a consistent theme across verified reviews.
This is a phosphorus-free fertilizer, so it is ideal if a soil test already showed your phosphorus levels are high. Unlike the Yard Mastery 24-0-6 which contains 6% potassium, this formula delivers 8% potassium for even stronger drought and stress resistance. At 18 pounds, it is noticeably lighter than the 45-pound Yard Mastery bag, making it easier to carry and pour. It covers up to 10,000 sq ft according to buyer accounts.
Why it stands out
- Twice the number of particles per square foot for streak-free coverage
- Humic DG helps nutrient uptake in the soil
- Phosphorus-free formula works when soil phosphorus is already high
One thing to know
- 16% nitrogen is lower than the quick-fix options (e.g. Petramax 28-0-0) — green-up is steady but not instant
- Not for sale in CA, OR per the manufacturer
Best suited for: The homeowner who already did a soil test and knows phosphorus is high, or anyone who values even, professional-grade spread patterns.
skip it if: You need a rapid green-up in days — the nitrogen release is designed for steadiness, not speed.
3. Petramax Liquid Nitrogen Fertilizer 28-0-0 NPK (32 oz)
A 2-in-1 liquid that delivers both a burst and a lasting feed from a single 32-oz bottle.
This liquid fertilizer uses 70% quick-release nitrogen for rapid green-up and 30% slow-release nitrogen to keep feeding between applications. One buyer wrote, “This stuff works great and my lawn has never been so green” — exactly what you want to hear when your grass is yellow and you need a visible turnaround. Mix 5 oz per gallon of water for maintenance (treats up to 12,800 sq ft) or 10 oz per gallon for correcting nitrogen deficiency (treats up to 6,400 sq ft).
Liquid formulas mean you do not need a spreader — just a hose-end sprayer or a pump sprayer. This makes it ideal for spot-treating yellow patches rather than covering the whole lawn. Unlike the granular 46-0-0 Urea from Supply Solutions, this formula uses a 28-0-0 ratio that is safer on warm-season grasses if you follow the dilution. The bottle is 32 ounces, far lighter than the 45-pound Yard Mastery bag, so storage and handling are much simpler.
What works well
- 70% quick-release nitrogen means visible green in days, not weeks
- Treats up to 12,800 sq ft per bottle for maintenance applications
- Liquid form works with all grass types and needs no spreader
The trade-off
- Needs more frequent reapplication than slow-release granular formulas
- Mixing ratio (1:20 or 1:10) requires measuring each time
Ideal for: Anyone who wants to see results fast — especially for patchy yellow spots or if you do not own a broadcast spreader.
Not ideal if: You want a “set and forget” product for the whole season. For that, the Yard Mastery 24-0-6 works better.
4. Pennington Full Season Lawn Fertilizer 32-0-5 (11.2 lb)
A single application that feeds for four months with 5% iron for deep green color.
Pennington uses polymer coated urea, a technology that slowly releases nitrogen for up to 4 months. This means one spring application can carry your lawn through the entire growing season without another spread. The 32-0-5 ratio gives you 32% nitrogen — among the highest in this lineup — combined with 5% iron for that rich dark green color. The bag is 11.2 pounds and covers 4,000 sq ft, which is smaller coverage than the 15,000-sq-ft Yard Mastery bag but perfect for smaller lots or targeted sections.
The formula also contains natural beneficial microorganisms that revitalize soil biology, a feature not found in the straight urea products like Supply Solutions 46-0-0. One limitation: this product is not available in Hawaii and South Dakota, per the manufacturer. At 11.2 pounds, it is easy to carry and pour compared to the 45-pound Yard Mastery or Double Dark options.
Key strengths
- 32% nitrogen is the highest ratio in this comparison for maximum green-up power
- Polymer coated urea releases slowly for up to 4 months
- 5% iron deepens green beyond what nitrogen alone provides
Limitations
- 4,000 sq ft coverage means larger properties need multiple bags
- Cannot be shipped to Hawaii or South Dakota
Who it serves: Homeowners with small to medium lawns who want maximum convenience — spread once and forget until fall.
Consider alternatives if: Your lawn is larger than 4,000 sq ft and you would rather buy one big bag than multiple small ones.
5. GreenView Fairway Formula Lawn Fertilizer 27-0-5 (16.5 lb)
A solid nitrogen kick with 63% slow release that feeds without burning for up to 12 weeks.
GreenView hits the balance with a 27-0-5 NPK (nitrogen-phosphorus-potassium) ratio where 63% of the nitrogen is slow-release. This means you get a steady 12-week feed without the surge of growth that forces you to mow twice a week. The 16.5-pound bag covers 5,000 sq ft, which is comparable to the Pennington 32-0-5 at 4,000 sq ft but with a better cost-per-square-foot value according to buyer comparisons. Unlike the Petramax liquid that requires mixing each time, this is a straight granular application — just spread and water.
It contains no phosphate, so it is safe for waterways and suitable if your soil test shows phosphorus is adequate. The formula is designed for any grass type including bermuda, and the manufacturer promotes it as a spring fertilizer that works during any active growth. At 16.5 pounds, it is a manageable weight for carrying around the yard, lighter than the 45-pound Yard Mastery options.
What makes it a value pick
- 63% slow release nitrogen delivers consistent color for 12 weeks per application
- Phosphate-free formula protects local waterways
- 16.5 lb bag covers 5,000 sq ft — good middle-ground weight
Where it falls short
- No added iron or soil conditioners compared to premium options like Yard Mastery
- Quick-release portion is smaller than the Petramax liquid, so initial green-up is slower
Best for: The budget-conscious buyer who still wants a high-nitrogen granular with good slow-release technology and no phosphate concerns.
Skip if: You want the fastest possible color change — a liquid like Petramax would green it up faster even though the total cost is similar.
6. Supply Solutions Urea 46-0-0 Nitrogen Fertilizer (5 lb)
Pure 46% nitrogen concentrate for when you need the strongest possible green-up dose.
This is straight urea with a 46-0-0 ratio — the highest nitrogen concentration in this comparison, nearly double the 24-0-6 of the Yard Mastery flagship. It is not a blended lawn fertilizer; it is a pure nitrogen supplement. For yellow grass, this is like hitting the gas pedal directly. The application rate is very low: just 1/5 lb per 1,000 sq ft for turf, or 3 cups per 100 sq ft for trees and shrubs. This means a 5-pound bag goes a long way if you use it as a spot treatment.
Because it is pure urea, there are no other nutrients — no potassium, no phosphorus, no iron. Unlike the Petramax 28-0-0 which has built-in slow-release technology, this is all quick-release. You need to be precise with application or you risk burning the grass. The bag weighs 5 pounds, making it the lightest option here, but the trade-off is that it takes careful measuring compared to pre-mixed granular blends like GreenView.
Why it is useful
- 46% nitrogen is the strongest dose available for reversing severe yellowing
- Very small application rates — a 5 lb bag covers a lot of turf
- Works for lawns, trees, shrubs, vegetables, and flowers
Caution points
- No slow-release mechanism — requires more frequent application
- No added iron or potassium; you may need separate supplements
- Easy to over-apply and burn the turf if you do not measure carefully
Who should consider it: Experienced gardeners who understand nitrogen rates and want a pure, affordable nitrogen boost without extra fillers.
Not for: Casual lawn owners who want a simple spread-and-forget product — the Yard Mastery 24-0-6 or Pennington 32-0-5 are far more forgiving.
7. Yard Mastery 16-0-0 Double Dark Granular Lawn Fertilizer with 6% Iron (45 lb)
Deepens green without triggering a growth surge that forces you to mow every three days.
This is the specialist in the lineup: a 16-0-0 NPK (nitrogen-phosphorus-potassium) ratio with 6% iron. The iron is the star here — it is what turns the lawn a dark, rich green without pushing excessive leaf growth. This makes it ideal if your grass is yellow but you do not want to deal with rapid vertical growth that requires frequent cutting. Unlike the 32-0-5 Pennington that pushes strong growth, this formula provides “great for greening up the lawn but won’t flush it with too much growth” according to the manufacturer.
At 45 pounds, it is the same heavy bag as the Yard Mastery 24-0-6 Flagship and covers the same 15,000 sq ft. However, it contains Bio-Nite, the same soil conditioner found in the Flagship, plus urea for the darker green color. The key difference: the 24-0-6 has more potassium (6%), making it better for overall health, while the 16-0-0 Double Dark is purpose-built for color. If your lawn is already healthy but just pale, this is the better choice.
Its unique angle
- 6% iron delivers dramatic greening without excessive leaf growth
- Bio-Nite additive improves soil health and nutrient uptake
- 45 lbs covers 15,000 sq ft — same large coverage as the Flagship
The limitation
- 16% nitrogen is lower than most options here, so it is not the fastest yellow fix
- No potassium (0% in the NPK ratio), so it does not build drought or stress resistance
Best fit for: Lawns that are yellow but already structurally healthy — you just want color without the mowing workload.
Not ideal if: Your grass is yellow AND weak or thin. For that, the Flagship 24-0-6 with potassium would strengthen the turf while greening it up.
Understanding the Specs
NPK Ratio
The three hyphenated numbers on every fertilizer bag stand for Nitrogen, Phosphorus, and Potassium. For yellow grass, the first number — nitrogen — is what matters most. The higher it is (like 32% in the Pennington or 46% in the Supply Solutions Urea), the stronger the green-up effect. But a very high first number also means you risk burning the grass if you over-apply. A balanced option like 24-0-6 trades some nitrogen power for a safer, slower release.
Slow Release vs Quick Release
Quick-release nitrogen dissolves in water fast and reaches the roots within days. This is what turns yellow grass green quickly, but it also fades fast and can burn if you apply too much. Slow-release nitrogen uses a coating (polymer coated urea) or a chemical form that breaks down over weeks. The blend matters: the Petramax liquid uses a 70% quick / 30% slow split for immediate color plus lasting feed, while the GreenView uses 63% slow release for a steadier, longer-lasting effect with less burn risk.
Iron Content
Iron does not fix nitrogen deficiency — it is a separate nutrient that deepens the green color once nitrogen levels are adequate. Fertilizers that list a specific iron percentage (like 3% in Yard Mastery Flagship or 5% in Pennington or 6% in Yard Mastery Double Dark) give a darker, richer green than nitrogen alone. If your yellow grass is actually iron-deficient (pale with green veins), these formulas handle both issues at once.
Coverage Area
Granular fertilizers tell you how many square feet each bag covers. The 45-pound Yard Mastery and Double Dark bags cover 15,000 sq ft, while the 16.5-pound GreenView covers 5,000 sq ft. Liquid fertilizers like Petramax list coverage based on dilution: 12,800 sq ft at maintenance rate (5 oz per gallon) or 6,400 sq ft for correcting deficiency (10 oz per gallon). Always measure your lawn area first — buying too-small bags means multiple purchases, while over-covering risks nutrient runoff.
FAQ
Will a high-nitrogen fertilizer fix yellow grass in one application?
Can I use the Supply Solutions 46-0-0 Urea on my whole lawn?
What is the difference between the Yard Mastery 24-0-6 Flagship and the 16-0-0 Double Dark?
How often should I apply a liquid nitrogen fertilizer like Petramax?
Can I use a fertilizer with iron if my soil pH is high?
Is it safe to use a 32-0-5 fertilizer like Pennington on bermuda grass?
What does the 63% slow release mean on the GreenView 27-0-5 bag?
Can I use the Andersons PGF 16-0-8 on a newly seeded lawn?
How do I store a 45-pound bag of granular fertilizer like Yard Mastery Flagship?
Is there a difference between liquid and granular fertilizer for yellow grass?
Final Thoughts: The Verdict
For most buyers, the best fertilizer for yellow grass winner is the Yard Mastery 24-0-6 Flagship because its 24% slow release nitrogen, 3% iron, and 6% potassium cover every angle — color, growth, and stress resistance — all from one 45-pound bag that covers 15,000 sq ft. If you want the fastest possible green-up without a spreader, grab the Petramax 28-0-0 Liquid. And for a budget-friendly granular that still delivers strong slow-release nitrogen, the GreenView Fairway Formula 27-0-5 is tough to top.
How We Picked
We do not accept paid placement. Every pick is matched to a real buyer and a real use-case; we do not hands-on test units.
Sources & Methodology
Specifications: manufacturer listings and product documentation. Review insights: verified customer reviews, as of July 2026. Pricing: not shown on this page (it changes often); check the current price via the retailer link.
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