Best Sulphate of Ammonia Fertiliser for Lawns, Gardens, and Larger Areas
Ammonium sulfate, also called sulphate of ammonia, is a nitrogen fertilizer used for lawns, gardens, and crops. The best option depends mainly on how much fertilizer you need: choose a small bag for limited applications, a mid-size bag for routine home use, or a larger bag for broad areas. The products below include three listings that specify a 21-0-0 formula and two options identified by package size or high-nitrogen use.
| Product | Best For | Listed Size Or Formula |
|---|---|---|
| Ammonium Sulfate 21-0-0 | Small gardens and trial use | 1 lb; 21-0-0 |
| High Nitrogen Ammonium Sulfate | Buyers seeking a 5 lb bag | 5 lb; high nitrogen |
| Ammonium Sulfate 21-0-0 | Moderate home use | 2 lb; 21-0-0 |
| CountryMax Ammonium Sulfate | Lawn and garden applications | 10 lb; 21-0-0 |
| 21-0-0 Ammonium Sulfate | Large-area or frequent use | 40 lb; 21-0-0 |
Ammonium Sulfate 21-0-0, 1 Pound
This 1-pound product is labeled as a water-soluble, high-nitrogen 21-0-0 ammonium sulfate fertilizer for lawns, crops, and gardens. The listed formula identifies nitrogen and does not list phosphate or potash in the N-P-K numbers.
Best for: gardeners who need a small quantity, want to try ammonium sulfate, or have a limited treatment area. It is the smallest listed package in this selection, which can help avoid buying a larger supply than a project requires.
Consider: the listing does not provide application rates in the supplied product information. Follow the package directions and the needs of the specific plants; do not assume a rate based only on the 21-0-0 label.
High-Nitrogen Ammonium Sulfate, 5 Pounds
This 5-pound product is described as high-nitrogen ammonium sulfate for plants and rapid growth. Unlike several other products in this list, the supplied name does not state a specific N-P-K ratio, so check the product label for the nutrient analysis before applying it.
Best for: buyers looking for a middle-size bag for plant care rather than a 1- or 2-pound package. The stated high-nitrogen positioning may suit shoppers specifically comparing nitrogen fertilizers, provided the crop or lawn needs additional nitrogen.
Consider: the product name alone does not confirm the exact nitrogen percentage or application instructions. Verify both on the package before comparing it directly with a labeled 21-0-0 fertilizer.
Ammonium Sulfate 21-0-0, 2 Pounds
This is a 2-pound version of a water-soluble ammonium sulfate fertilizer labeled 21-0-0. The product name lists use for lawns, crops, and gardens, making it a broadly positioned option for buyers comparing small packages.
Best for: home gardeners who need more product than the 1-pound option but do not want to move directly to a 5- or 10-pound bag. Its stated formula makes nutrient comparison more straightforward than products without an N-P-K figure in the name.
Consider: the product title does not specify a recommended application rate or coverage area. Use the package directions, and avoid applying extra fertilizer simply because the bag contains more than a smaller option.
CountryMax Ammonium Sulfate, 10 Pounds
CountryMax is listed as a 10-pound ammonium sulfate 21-0-0 fertilizer for lawns and gardens. The larger package is a practical format for shoppers planning to treat more than a small planting area, while the stated formula allows comparison with other 21-0-0 products.
Best for: lawn and garden owners who expect to use more fertilizer than a small bag provides. It is a mid-to-large package choice between the 5-pound and 40-pound products listed here.
Consider: the supplied product name does not state coverage, spreading method, or application frequency. Confirm the label directions and storage guidance before choosing a larger quantity.
21-0-0 Ammonium Sulfate, 40 Pounds
This product is listed as a 40-pound bag of 21-0-0 ammonium sulfate fertilizer. Its package size is substantially larger than the other choices, so it may be suitable when a smaller bag would not meet the buyer’s planned needs.
Best for: buyers managing a large lawn, garden, or crop area who have confirmed that ammonium sulfate fits their soil and plant requirements. The stated 21-0-0 formula makes the nutrient analysis clear from the product name.
Consider: a 40-pound bag may be excessive for a small yard or occasional use. Check the label for directions and make sure you can store the remaining fertilizer as instructed.
Buying Guide: How To Choose Ammonium Sulfate Fertilizer
What does 21-0-0 mean?
The three numbers on a fertilizer label represent its N-P-K analysis: nitrogen, phosphate, and potash. A 21-0-0 label identifies a product with 21% nitrogen by weight and zero listed phosphate and potash. Compare the complete package label, especially when a product name says only “high nitrogen” without giving a ratio.
How much fertilizer should I buy?
Match package size to the area you intend to treat and the label’s application rate. The 1- and 2-pound bags are smaller choices, the 5- and 10-pound packages provide more product, and the 40-pound option is intended for buyers who can use and store a much larger quantity. Do not select a bag size as a substitute for calculating the correct application amount.
Is ammonium sulfate suitable for every lawn or garden?
No single fertilizer is right for every soil or plant. Check whether additional nitrogen is needed and follow the product instructions for the intended use. If soil conditions or nutrient needs are uncertain, a soil test can help guide fertilizer selection. Avoid applying fertilizer near water or in conditions prohibited by its label.
What should I compare before buying?
Compare the N-P-K analysis, package weight, stated uses, and application directions. Water-soluble is specified in the names of the 1- and 2-pound products, but the supplied details do not make that claim for every option. Check the full listing and product label rather than assuming all formulations have identical handling or application instructions.
Frequently Asked Questions
Is sulphate of ammonia the same as ammonium sulfate?
Yes. “Sulphate of ammonia” is a common name for ammonium sulfate, the fertilizer featured in these product listings.
Which product has the smallest package?
The 1-pound ammonium sulfate 21-0-0 product is the smallest package listed.
Which option is labeled for lawns and gardens?
The CountryMax 10-pound product is specifically named for lawn and garden use. Other listings also name lawns, crops, gardens, or plants as intended uses.
Can I use ammonium sulfate without checking my soil?
It is better to check plant needs and soil conditions first. Follow the fertilizer label, and consider a soil test if you are unsure whether more nitrogen is needed.
Do all five products list a 21-0-0 analysis?
No. Four product names specify 21-0-0. The 5-pound product is described as high nitrogen, but its supplied name does not state an exact N-P-K ratio.