Feed & Green Up
21-0-0 Ammonium Sulfate21-0-0 Ammonium Sulfate
Night Shift
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At a glance
- Grass types
- Compatibility not yet confirmed. Check the product label.
- Analysis / specs
- 21-0-0
Why use it—and how?
AI automatically looks up why and how to use 21-0-0 Ammonium Sulfate for St. Augustine, using product and lawn-care sources.
Night Shift 21-0-0 Ammonium Sulfate is a nitrogen-only fertilizer that provides a quick-release source of nitrogen and sulfur. It is used to promote rapid greening and vegetative growth in turfgrass.
Is it right for St. Augustine?
Ammonium sulfate is generally considered compatible with St. Augustine grass, including common varieties in Texas, as it is a nitrogen-only source often recommended by university extension services to avoid excessive phosphorus buildup in the soil.
Why use it?
You would use this product if your lawn requires a nitrogen boost to improve color and density. It is particularly useful when soil tests indicate that phosphorus is already sufficient, as it provides nitrogen without adding unnecessary phosphorus. It is not a complete fertilizer and does not provide potassium or other micronutrients.
How to approach using it
- Read the specific product label on your container to understand all safety precautions, required personal protective equipment (PPE), and environmental restrictions.
- Perform a soil test to determine if your lawn actually requires nitrogen and to confirm that phosphorus levels are adequate, as this product only supplies nitrogen and sulfur.
- Consult the label for the correct application rate based on your lawn's square footage to avoid over-application, which can lead to turf damage.
- Apply the product evenly across the lawn using a spreader, following the label's instructions regarding watering-in requirements to ensure the nutrients reach the soil effectively.
Before you apply
Do not apply this product without first reading the specific label on your container, as it contains the only authoritative instructions for your specific purchase. Avoid applying during dormant winter months unless specifically directed by local extension guidance for overseeded lawns. Over-application of fast-release nitrogen can cause turf burn or excessive, weak growth.
Sources to review
AI can make mistakes. This is educational guidance—not a diagnosis or an application prescription. Always follow your exact product label for rates, restrictions, and safety.
AI guidance ready. Review the sources above and your product label.
How I’d Use It
Use the sourced guidance below for application context. Confirm rates, timing, watering, and grass restrictions on your exact product label before applying.
View how-to guidanceTools I’d Use With This Product
Where to buy
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Product details
- Full product name
- 21-0-0 Ammonium Sulfate
- Manufacturer
- Night Shift
- Category
- Feed & Green Up
- Analysis / specifications
- 21-0-0
- Nitrogen
- 21%
- Application unit
- lb
Always follow the product label. Label rates, grass restrictions, timing, and safety precautions take priority over this guide.