Ammonium sulfate chemical formula is (NH4)2SO4. The substance contains 24 percent sulfur while the nitrogen percentage is 21. The most common application of ammonium sulfate is its use a soil fertilizer. Its formula is 21-0-0 which means that there is no potassium and phosphorus; two important plant nutrients.

Application of ammonium sulfate as fertilizer brings quick boost to you grass health. It is available both in liquid form as well as granular so you can easily select the one best for your lawn overall health.

The fertilizer is found suitable for all types of plants and grasses both warm season as well as cool season. The effects of this fertilizer remain for 4 to 6 weeks.

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It is important to use the fertilizer in required amount, avoid over use. If you exceed the recommended application it can burn your lawn grass. Different types of grasses have different application rates as well as timing differences. So before apply it to your lawn it is important to properly understand the maximum amount of ammonium sulfate needs of your grass type and also makes sure when to apply it means the timing gap between two applications.

Also Read: Ammonium Sulfate For Grass Advantages and Disadvantages

Benefits of Sulfur and Nitrogen For Your Lawn

As it is obvious from its name ammonium sulfate provides lawns with sulfur and nitrogen. Nitrogen plays a vital role in different functions of a plant, is highly important for its overall wellbeing. It is the prime grass nutrient contributor. Nitrogen has a big role in chlorophyll creation. Without chlorophyll plants can’t survive, the grass needs it for living and growth. Sulfur plays a secondary nutritional role.

If your lawn soil is low in organic substances it might be due to lack of required amount of sulfur. Lack of sulfur can cause different health problems for your lawn such as slow growth, yellowing older leaves and your grass not achieve the maturity in the required time frame.

If your lawn is nitrogen and sulfur deficient then you can easily cover this gap with application of ammonium sulfate in quick span of time because of the water soluble properties of this fertilizer. After application, when it rains or you irrigate your lawn these substances (sulfur and nitrogen) are instantly available to your lawn grass roots for absorption.

At time of writing this piece of content ammonium sulfate was cheaper when compared to its prices with slow release fertilizers by taking into account per pound of nitrogen cost.

The fertilizer comes with properties for giving your lawn a lush green look even at low temperature.

Also Read: Best Fertilizer To Make Grass Green

Cons of Using Ammonium Sulfate For Your Lawn Health

Care is must if you are using ammonium sulfate as lawn fertilizer. If you use more than the required amount of fertilizer it can burn your lawn. Lawn fertilizers have their specific salt index. The salt index indicates the fertilizer capability for burning your lawn grass. Ammonium sulfate comes with salt index 69 that means it has high potential for burning grass if it is applied in excessive amount.

Ammonium sulfate is highly soluble in water so there is high risk of its leaching into groundwater. So it is important to apply it frequently for long lasting benefits.

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How Much Ammonium Sulfate To Use For Your Lawn?

Your lawn needs regular but small applications of this fertilizer. For example Zoysia grass which is famous for its hardness. It is warm season grass. According to US Department of Agriculture plant hardiness zones it is 5 to 10. Zoysia grass needs 2 to 4 lb. of nitrogen a year per thousand sq. feet. As ammonium sulfate comes with 21% nitrogen so to calculate one pound of actual nitrogen you need to divide 100 by 21 that gives 4.76. For warm seasons grasses apply ammonium sulfate from spring through the growing season. You need to feed your Zoysia lawn with 4 pound of nitrogen per year, so apply 2/3 pound of this fertilizer at each application. Read the supplier’s instructions about application rates carefully.

Tall Fescue is a cool season grass. According to US Department of Agriculture plant hardiness zones it is 4 to 7. It needs nitrogen in same quantity as mentioned above for Zoysia. It needs 2 to 4 lbs. of nitrogen per 1000 sq. feet per year. The best season for fertilize application for cool season grasses is mid-spring, late summer, early summer or late fall. To feed your lawn with required 4 lbs. of nitrogen, you need to apply 2/3 pound of this fertilizer after two weeks. It is important to read your fertilizer supplier instructions how to use it and in what amount.