Slow vs. Fast Release Nitrogen for Bermuda Grass: Which One is Right for You?

Choosing the right type of nitrogen fertilizer for your Bermuda grass lawn is a critical decision that can significantly impact its health and appearance. While slow-release and fast-release nitrogen sources are the most commonly used, there are various options within these categories, each with its unique benefits and drawbacks. In this comprehensive guide, we’ll explore the specifics of slow and fast-release nitrogen, including popular and lesser-known options, to help you make an informed choice for your lawn.

Slow-Release Nitrogen: The Long-Term Investment

What is it?

Slow-release nitrogen is typically coated urea designed to release nutrients gradually over 4-8 weeks.


  • Sustained Growth: Provides a steady nutrient supply for even growth.
  • Less Frequent Application: Requires fewer applications, saving time and effort.
  • Lower Risk of Burn: Less likely to cause fertilizer burn.

Common Types

  • Milorganite: An organic, eco-friendly option made from heat-dried microbes.
  • Pro-Care Natural Fertilizer 4-3-0: Another organic choice, this product is derived from feather meal and provides a balanced nutrient profile.

Fast-Release Nitrogen: The Quick Fix

What is it?

Fast-release nitrogen is immediately available for plant uptake and usually lasts 2-3 weeks.


  • Quick Results: Rapidly greens up your lawn.
  • Cost-Effective: Generally cheaper than slow-release options.


  • Frequent Application: Requires more frequent applications for consistent results.
  • Risk of Burn: Higher likelihood of causing fertilizer burn.

Common Types

  • Ammonium Sulfate (21-0-0): A popular fast-release option that also helps to decrease soil pH, making it a dual-purpose fertilizer.
  • Urea (46-0-0): Another fast-release option, Urea provides a high percentage of nitrogen but lacks the pH-adjusting benefits of Ammonium Sulfate.

Special Considerations: Soil pH

Ammonium Sulfate not only provides a quick nitrogen boost but also helps to acidify alkaline soils. If your soil test indicates a high pH level, this fertilizer can serve a dual purpose.

Which One to Choose?

For Thin or Patchy Lawns

Fast-release nitrogen like Ammonium Sulfate can provide the quick boost needed to fill in thin or bare spots.

For Mature, Thick Lawns

For well-established lawns, slow-release options like Milorganite or Pro-Care Natural Fertilizer are more suitable for sustained, even growth.


The choice between slow and fast-release nitrogen depends on your lawn’s current state, your lawn care goals, and your maintenance schedule. By understanding the pros and cons of each type and considering various options like Ammonium Sulfate, Milorganite, and Pro-Care Natural Fertilizer, you can make an informed decision that will help your Bermuda grass lawn flourish. Whether you’re looking for a quick green-up or a long-term nutrient solution, there’s a nitrogen source perfectly suited to your needs.






Leave a Reply

Your email address will not be published. Required fields are marked *