Ammonium Sulfate 21-0-0 Granular Fertilizer
Best nitrogen booster for gardeners seeking rapid, vibrant lawn and plant growth.
Elevate your lawn's vitality with Lawn Synergy's Ammonium Sulfate 21-0-0 Granular Fertilizer. This potent formula delivers a rapid 21% nitrogen boost, promoting vigorous growth and a deep, rich green color. Infused with 24% sulfur, it enhances nutrient absorption and supports robust soil health. Suitable for a variety of lawn types, landscape beds, and vegetable gardens, this versatile granular fertilizer can also be dissolved for spray applications, ensuring vibrant results throughout the year.
$39.99
More Ammonium Sulfate Fertilizer Options
Owner Satisfaction
4.5
/ 5
Category Rank
3101
/ 4449
#3101 in Fertilizers
Price vs Category Average
-35%
Below average
Active Ingredient
2124
/ Ammoniacal Nitrogen (N) %, Sulfur (S) %
Who it's for
- Homeowners seeking an immediate, vibrant green turf transformation
- Gardeners managing nutrient-deficient sandy or heavily cropped soil
- Landscapers needing to lower pH in alkaline soil conditions
Who should skip it
- Novice applicators prone to accidental over-application and turf burn
- Busy gardeners preferring low-maintenance, slow-release feeding schedules
- Long-term caretakers worried about soil acidity and microbial health
Performance breakdown
Nitrogen Potency
High-concentration formula delivers an immediate, visible boost to turf vitality.
Application Versatility
Dual-purpose granules work perfectly for both broadcast spreading and liquid spraying.
Soil Conditioning
Significant sulfur content actively improves nutrient uptake and overall soil health.
Greening Speed
Quick-release nitrogen ensures rapid color transformation for tired, pale lawns.
Seasonal Adaptability
Effective performance across all four seasons provides consistent year-round growth support.
Coverage Efficiency
Standardized application rates make calculating coverage for large areas straightforward.
Key Specs
Active Ingredient
Ammoniacal Nitrogen (N) 21%, Sulfur (S) 24%
Form
Granular
NPK Ratio
21-0-0
Application Rate
1.19 lbs. of 21-0-0 per 1,000 sqft for 0.25lb N
Time to Apply
Spring, Summer, Fall, Winter
Delivery System
Dispersible Granules
For Use In
Turf Grass, Landscape Beds, Vegetable Gardens
Release Type
Quick Release
Features
- Promotes rapid growth and deep green color
- Quick-acting 21% nitrogen formula
- Enhances soil health with 24% sulfur
- Versatile granular or liquid application
- Suitable for multiple lawn types
- Ideal for turf, beds, and gardens
- Fast-release nitrogen source
- Effective across all seasons
What customers say
Customers consistently praise this fertilizer for delivering rapid, vibrant green color, especially for cool season grasses and acid loving plants. Its high nitrogen content effectively corrects deficiencies and boosts growth. Reviewers appreciate the granular form for easy spreading and value the sulfur content for improving soil structure. The core theme is exceptional, professional grade performance compared to weaker options. A key consideration is the product's high potency; users must apply precisely and water thoroughly immediately to avoid fertilizer burn. When used correctly, this product offers superior results and high value.
Know before you buy
Because this is a fast-release nitrogen source, you can expect to see a noticeable green-up and growth response relatively quickly, typically within a few days to a week depending on moisture and temperature.
Yes, this fertilizer is suitable for vegetable gardens as well as turf and landscape beds. Its 21-0-0 ratio provides the nitrogen necessary for leafy growth, while the sulfur content helps improve overall soil health.
Yes, the granules are dispersible, meaning they can be dissolved in water for liquid application. This offers flexibility if you prefer spraying over using a broadcast spreader.
No, this is a specialized 21-0-0 formula. It is designed specifically to provide a high-impact nitrogen boost and sulfur supplementation, rather than a balanced NPK blend.
To achieve a nitrogen application of 0.25 lbs per 1,000 square feet, you should apply 1.19 lbs of the product per 1,000 square feet. Always ensure even coverage using a broadcast spreader.
Yes, this fertilizer is effective across all seasons, including spring, summer, fall, and winter. Its versatility makes it a reliable choice for maintaining color and growth throughout the year.
Still have a question?
Ask Hayley anything about this product before you decide.