Ammonium Sulfate 21-0-0 Fertilizer
Ammonium Sulfate 21-0-0 Fertilizer gives your lawn a fast nitrogen boost for deep green color, stronger growth, and improved turf density. With added sulfur, it helps support rich lawn color and better nutrient performance during the active growing season.
$39.99
Make It Easy- Auto Delivery Program
Fast-Acting Nitrogen with Added Sulfur — Ideal for High pH Soils. 21-0-0 Ammonium Sulfate delivers 21% fast-release nitrogen along with 24% sulfur, making it an excellent choice for lawns that need quick green-up while improving...
Fast-Acting Nitrogen with Added Sulfur — Ideal for High pH Soils.
21-0-0 Ammonium Sulfate delivers 21% fast-release nitrogen along with 24% sulfur, making it an excellent choice for lawns that need quick green-up while improving nutrient availability in alkaline soils.
This is a preferred nitrogen source for experienced lawn enthusiasts and professionals who want reliable performance without the volatility concerns of urea.
Why Choose Ammonium Sulfate Over Urea?
- Lower volatilization risk compared to urea
- Helps lower soil pH over time in alkaline soils
- Improves iron availability for deeper green color
- Excellent for spoon-feeding programs
- Fully soluble for liquid applications
If you have high pH soil or struggle with yellowing turf despite fertilizing, ammonium sulfate is often the better nitrogen source.
Best Used For
- Correcting nitrogen deficiency
- Summer feeding programs
- High pH or alkaline soils
- Liquid lawn applications
- Boosting color before events or peak growth periods
Application Rates
Maximum recommended nitrogen rate: 1 lb N per 1,000 sq ft per application.
- 18 lbs. covers up to 7,560 sqft
- 50 lbs. covers up to 21,000 sqft.
Water in after application for best results.
Liquid or Granular
- Dissolves easily for spray applications
- Can be applied granular with a broadcast spreader
Looking for controlled-release nitrogen? Consider our professional blended fertilizers for longer feeding and reduced burn risk.
| Key | Value |
|---|---|
| Active Ingredient | Ammoniacal Nitrogen (N) 21% Sulfur (S) 24% Derived from Ammonium Sulfate |
| Lawn Types | Tall fescue, Bermuda, Zoysia, St. augustine, Centipede, Kentucky bluegrass, Ryegrass |
| Special Features | Granular |
| Application Rate | .25lb of N /1,000 sqft = 1.19 lbs. of 21-0-0 .5lb of N /1,000 sqft = 2.38 lbs. of 21-0-0 1lb of N /1,000 sqft = 4.76 lbs. of 21-0-0 |
| Time to Apply | Spring, Summer, Fall, Winter |
| Delivery System | Dispersible Granules |
| Brand | Lawn Synergy |
| For Use In | Turf Grass, Landscape Beds, Vegetable Gardens |
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