Ammonium sulfate fertilizer typically costs $25-$45 for a 50-pound bag or about $500-$850 per ton before delivery, with an average bag price near $33. Grade, order size, freight distance, retailer, and whether the price includes delivery or application have the biggest effect on the final bill.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| 50-pound bag | $25 | $33 | $45 | Retail price; $0.50-$0.90 per pound |
| Bulk fertilizer per ton | $500 | $675 | $850 | Before freight; usually larger orders |
| Delivered bulk per ton | $600 | $800 | $1,050 | Varies with distance and minimum load |
| Spreading service | $8 | $15 | $30 | Per acre; fertilizer not included |
What a 50-pound bag or bulk ton usually costs
Ammonium sulfate, commonly labeled 21-0-0-24S, supplies 21% nitrogen and 24% sulfur. A standard 50-pound bag generally sells for $25-$45, equal to about $0.50-$0.90 per pound of product. Farm, landscape, and industrial suppliers may quote by the ton instead.
For a practical budget, allow $30-$40 per retail bag or $650-$850 per bulk ton before delivery. A ton contains forty 50-pound bag equivalents, but bagged retail pricing is usually higher per ton than bulk pricing. Assumptions: standard granular 21-0-0-24S product, ordinary access, and no custom application.
What fertilizer quotes include for product and delivery
Check whether the quote covers only the fertilizer or also freight, unloading, spreading, and taxes. Bulk prices can look lower until delivery minimums or handling charges are added; bag prices may include retail handling but not delivery to the field.
| Quote component | Typical charge | What changes it | Price check |
|---|---|---|---|
| Product | $25-$45 per 50-pound bag | Brand, grade, package size | Compare same analysis |
| Bulk product | $500-$850 per ton | Volume and supplier inventory | Confirm delivered or pickup |
| Freight and handling | $50-$250 per ton | Distance, load size, unloading | Ask about minimum load |
| Spreading labor | $8-$30 per acre | Field size and equipment | Check for minimum service fee |
| Taxes or local fees | $0-$75 per order | Location and transaction | Request an itemized total |
The delivered, spread price—not the fertilizer-only rate—is the useful comparison. Application charges can be quoted per acre, per hour, or as a minimum trip fee.
How grade, tonnage, and sulfur needs shift the price
Ammonium sulfate is typically sold as granular or crystalline material at the 21-0-0-24S analysis, but granule size, coating, packaging, and product handling can affect the quote. A specialty or tightly screened product may cost more than standard agricultural material.
Order size matters: a few bags usually carry the highest per-pound cost, while pallet purchases or multi-ton orders may reduce the product rate. However, a small farm needing less than a truckload can lose those savings to freight minimums. Compare the price per pound of nitrogen as well as the price per bag. At 21% nitrogen, each 50-pound bag contains about 10.5 pounds of nitrogen.
Soil conditions also affect the amount needed, not just the product price. A recommendation for 100 pounds of nitrogen per acre would require about 476 pounds of this fertilizer per acre, before considering other nutrient sources. Use a soil test and local agronomic guidance rather than applying a standard rate.
Why freight distance and order size change delivered rates
Bulk material is heavy, so transportation can erase a low pickup price when the supplier is far away. A nearby agricultural dealer may offer a better delivered total even with a higher product quote. In many rural areas, a full truckload can lower freight per ton; a partial load may trigger a minimum charge or higher rate.
Regional differences also reflect local supply and competition. Delivered quotes in remote areas may run 10%-25% above a nearby supply market, while high-volume farm regions can have more competitive bulk pricing. Ask suppliers to quote the same tonnage, delivery address, unloading method, and product grade.
When seasonal demand can raise ammonium sulfate prices
Prices may move with fertilizer supply, energy and freight costs, and regional planting demand. Ordering close to spring fieldwork can limit supplier choice or make delivery scheduling more expensive. Retail bag pricing may also differ from agricultural bulk pricing even in the same area.
There is no guaranteed low-price month because markets and local inventory vary. Requesting quotes several weeks before the intended application can help reveal whether a supplier has stock and whether a delivery minimum applies. Confirm how long the quote remains valid before placing a large order.
How ammonium sulfate compares with other nitrogen sources
Urea and urea-ammonium nitrate solutions may provide nitrogen at a lower cost per pound in some markets, but they do not supply the same amount of sulfur. Ammonium sulfate can be a practical choice where both nutrients are needed, while paying extra for sulfur that a field does not need can raise the fertilizer budget unnecessarily.
Compare nutrient value, not just the bag price. For example, the 21-0-0-24S label indicates substantial sulfur alongside nitrogen; a different product may have a higher nitrogen concentration and require less product by weight. A soil test helps determine whether the sulfur content justifies the price.
How to lower the price without overapplying
Request at least three quotes for the same grade and quantity, and ask each supplier to separate product, freight, unloading, and spreading charges. Compare bag, pallet, and bulk rates only after including delivery. For large fields, combine orders with a nearby operation only if storage and handling can keep the product dry and usable.
Plan purchases ahead when practical, but avoid buying more than can be stored safely. Use the recommended application rate and calibrate spreading equipment to reduce overlap and waste. The most reliable savings come from matching product quantity to a soil-based nutrient need.