Hi-Yield Ammonium Sulfate Fertilizer 4 lb (2-Pack) — Fast-Release Nitrogen & Soil Acidifier

Hi-Yield Ammonium Sulfate 4 lb (2-pack) is a quick-release granular fertilizer that supplies readily available nitrogen and sulfur to promote faster greening and stronger growth in lawns, gardens, and landscape plants.

When plants need an immediate source of nitrogen and a boost of sulfur to help adjust soil acidity, a reliable, fast-acting product makes the difference. This two-pack of Hi-Yield 4 lb ammonium sulfate (21-0-0) provides concentrated ammonium nitrogen that plants can use quickly and elemental sulfur in a soluble form that helps with acidifying alkaline soils over time. The small, easy-to-handle bags are designed for routine feeding, touch-up applications, or targeted treatments where a rapid response is desired.

How quickly will I see results after applying this ammonium sulfate?

Because ammonium sulfate delivers water-soluble ammonium nitrogen, visual improvement in leaf color and growth typically appears faster than with slow-release sources. Expect greener foliage within days under favorable moisture and temperature conditions, though overall plant response depends on species and site conditions.

• Fast-release 21-0-0 nitrogen for rapid greening
• Observations of color change often within a few days
• Best results when watered in after application

Will this product help if my soil is alkaline?

Ammonium sulfate supplies sulfur and ammonium ions; the ammonium can acidify soil slightly as it nitrifies, and the sulfate portion contributes sulfur that supports gradual pH adjustment. It’s a practical option for mildly alkaline soils, but severe pH problems may need a comprehensive soil amendment plan based on test results.

• Contains sulfate to assist gradual soil acidification
• Useful for maintaining slightly acidic conditions preferred by many ornamentals and lawns
• Combine with soil testing to determine long-term amendment needs

How do I apply Hi-Yield ammonium sulfate safely and effectively?

Follow label rates and avoid over-application. For general feeding, the suggested rate is 0.75 pound per 100 square feet; apply evenly, then water to move nutrients into the root zone. Use protective gloves and avoid contact with foliage at high concentrations to prevent burn.

• Recommended rate: 3/4 lb per 100 sq ft
• Evenly broadcast and water in after spreading
• Wear gloves and keep product away from pets and children

Can I use this on all plant types, including vegetables and ornamentals?

Ammonium sulfate is broadly useful but best suited where a fast nitrogen response is needed and sulfate is acceptable. Some acid-sensitive plants prefer different fertilizers; always check plant-specific guidelines and follow label directions for edible crops to ensure safe use.

• Appropriate for lawns, shrubs, trees, and many garden plants
• Check crop-specific instructions for vegetables and fruiting plants
• Do not exceed recommended rates to avoid nutrient imbalance

Who this is for: Home gardeners, landscapers, and lawn-care enthusiasts who need a compact, two-pack supply of quick-acting nitrogen and sulfur will find this Hi-Yield ammonium sulfate convenient. It’s particularly useful for spot-treating nitrogen-deficient areas, maintaining slightly acidic soil conditions, or supplying a rapid greening boost during the growing season. For larger or longer-term soil correction, pair this product with soil testing and an integrated nutrient plan.

Ingredients

nitrogen