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Ammonium Sulfate Fertilizer 21-0-0 (Fast Acting)

Ammonium Sulfate Fertilizer 21-0-0 (Fast Acting)

by Greenway Biotech, Inc.
$0.00 - $141.99
$0.00
$24.99
$24.99 - $149.99
$24.99


Ammonium Sulfate Fertilizer (21-0-0)

Give your acid-loving plants and lawns the targeted nutrition they crave with our Ammonium Sulfate Fertilizer. This 100% water-soluble formula provides a powerful, fast-acting boost of two essential nutrients in one application, dissolving completely with absolutely no residue—making it perfect for direct soil application or fertigation systems.

Dual-Action Nutrition

  • 21% Nitrogen (as Ammonium): Unlike most soluble fertilizers that use nitrate, this formula delivers nitrogen entirely as ammonium. This is the exact form acid-loving plants (like blueberries, azaleas, and rhododendrons) are adapted to absorb, driving rapid vegetative growth and a deep, vibrant green color.

  • 24% Sulfur (as Sulfate): A heavy dose of sulfur actively supports chlorophyll formation, protein synthesis, and crucial enzyme functions.

Key Benefits

  • Lowers Soil pH: As soil bacteria convert the ammonium to nitrate, hydrogen ions are released, gradually dropping the soil pH. This makes it an exceptional choice for treating alkaline soils and creating the ideal acidic root zone for specialized crops.

  • Fast Lawn Green-Up: Highly effective as a fast-release nitrogen source to quickly revive pale, nutrient-deficient turf.

  • Corrects Deficiencies: The perfect single-product solution when a soil test indicates low levels of both nitrogen and sulfur.

Application Guidelines

  • Water Thoroughly: Because this is a fast-release soluble nitrogen source, it must be watered in deeply immediately after every application.

  • Split Your Doses: To drastically reduce the risk of fertilizer burn, split your total required amount across multiple, lighter passes rather than applying one heavy dose.

  • Protect Your Plants: Keep granules off plant foliage and stems to prevent burning.

  • Monitor Your Soil: The acidifying effect is cumulative. Always test your soil's pH before the first application and retest periodically to ensure optimal levels.

⚠️ Important Warnings & Storage

  • Staining Risk: This product can leave permanent rust-colored stains on concrete and stone. Carefully keep granules off all hardscapes and walkways.

  • Storage Requirements: Store tightly sealed in a dry location. Never store this product in contact with urea.

Quality & Safety You Can Trust

  • CDFA Registered: Complies with strict agricultural and environmental standards.

  • Third-Party Lab Tested: Independently tested for heavy metals, with results consistently well below required regulatory safety limits.

Frequently Asked Questions

What are the primary benefits of using Ammonium Sulfate Fertilizer 21-0-0 for my garden?
Ammonium Sulfate Fertilizer provides rapid nitrogen delivery as ammonium, promoting lush vegetative growth and deep green foliage. Its high sulfur content supports chlorophyll production and enzyme activity, enhancing overall plant health, especially for acid-loving plants like blueberries and rhododendrons.
How does Ammonium Sulfate Fertilizer affect soil pH, and is it suitable for alkaline soils?
As soil bacteria convert ammonium to nitrate, hydrogen ions are released, gradually lowering soil pH. This makes Ammonium Sulfate Fertilizer especially suitable for alkaline soils, helping to acidify the root zone for acid-loving plants and crops needing an acidic environment.
What are the recommended application practices for Ammonium Sulfate Fertilizer to minimize turf burn?
Apply Ammonium Sulfate Fertilizer in split doses rather than a single heavy application and thoroughly water in after each application. Keep the granules off foliage and stems to prevent damage, and avoid applying during extreme heat to reduce turf burn risk.
Is Ammonium Sulfate Fertilizer safe for use on lawns and ornamentals?
Yes, it is a fast-release, water-soluble fertilizer ideal for quick lawn green-up, as well as feeding acid-loving ornamentals like blueberries and azaleas. Always follow recommended rates and application methods to ensure safe and effective results.
Are there any precautions I should take when storing or handling Ammonium Sulfate Fertilizer?
Store Ammonium Sulfate Fertilizer sealed and dry, avoiding contact with urea or moisture. Keep it off hard surfaces like concrete to prevent rust-colored staining, and always handle with proper care to ensure safety and product integrity.