Nitra King 21-2-4 + 2 Fe
Best lawn fertilizer for homeowners seeking rapid, deep-green turf results.
Achieve a vibrant, deep-green lawn with Nitra King 21-2-4 + 2 Fe, an all-season fertilizer designed for rapid green-up. Its advanced FŪSN technology ensures an optimal blend of nitrate and ammoniacal nitrogen for robust turf health. The 2% iron content promotes rich color without staining hardscapes, thanks to its homogeneous pellet formulation. This synthetic fertilizer provides reliable, sustained results, making it an excellent choice for maintaining a healthy and attractive lawn throughout the year.
$50.65
Owner Satisfaction
4.7
/ 5
Category Rank
50
/ 4438
#50 in Fertilizers
Price vs Category Average
-18%
Below average
Total Nitrogen (N)
21.000
/ %
Who it's for
- Homeowners wanting an immediate, vibrant green lawn aesthetic
- Landscapers seeking efficient coverage with fewer product applications
- Eco-conscious property managers complying with strict nutrient runoff regulations
Who should skip it
- Gardeners planting new turf requiring root-strengthening phosphorus
- Busy homeowners looking to minimize their weekly mowing schedule
- Budget-focused buyers prioritizing low-cost, general-purpose lawn care
Performance breakdown
Green-up Speed
Nitrate nitrogen delivers a visible color boost in record time.
Application Versatility
The all-season formula performs reliably across varying climate conditions.
Hardscape Safety
Homogeneous pellets significantly reduce the risk of unsightly iron staining.
Nutrient Uniformity
Consistent granule size ensures even coverage across the entire lawn.
Coverage Efficiency
One bag provides substantial reach for standard residential lawn sizes.
Sustained Growth
Quick-release nitrogen provides immediate impact but requires more frequent follow-up applications.
Key Specs
Total Nitrogen (N)
21.000%
Available Phosphate (P2O5)
2.000%
Soluble Potash (K2O)
4.000%
Iron (Fe)
2.000%
Package Weight
50 lb
Coverage Area
10,500 square feet
Nitrogen Source
4.4% Nitrate Nitrogen
Fertilizer Type
All season fertilizer
Features
- Uniform nutrient distribution
- Promotes deep green color
- Minimizes staining on hardscapes
- Rapid green-up effect
- All-season application
- Combines nitrogen forms for immediate and sustained results
What customers say
Customers consistently praise Nitra King for its exceptional quality and reliable performance, making it a favorite among those seeking professional grade results. The primary theme is effectiveness; users report rapid, deep greening and sustained feeding without the typical growth surges associated with cheaper products. Application is straightforward, contributing to high marks for ease of use. While the price point is higher, consumers feel the superior results justify the investment, confirming its status as a highly effective and dependable lawn care solution.
Know before you buy
Because this fertilizer uses a quick-release formula with nitrate nitrogen, you can expect to see a rapid green-up effect shortly after application and watering.
No, the homogeneous pellet formulation is designed to minimize staining on hardscapes, making it safer to use near walkways and patios than many other iron-rich fertilizers.
Yes, Nitra King is formulated as an all-season fertilizer, providing the necessary nutrients to maintain turf health regardless of the time of year.
One 50 lb bag of Nitra King provides coverage for approximately 10,500 square feet of lawn.
FŪSN technology provides a balanced blend of nitrate and ammoniacal nitrogen, which ensures your lawn receives both an immediate boost and sustained nutrient delivery for long-term health.
Nitra King is a synthetic fertilizer, which allows for a precise, uniform nutrient distribution that is highly effective for rapid lawn recovery and deep greening.
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$51