Emerald 10-0-20 Lawn Fertilizer

Name: Emerald 10-0-20 Lawn Fertilizer
Brand: Lawn Synergy
SKU: LW-C9FB-GS6J
Price: 39.99 USD
Availability: InStock
Rating: 4.66 (122 reviews)

Stress Blend Fertilizer for Summer

$39.99

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Builds a Stronger, More Stress-Tolerant Lawn
Promotes Deep Root Growth & Overall Lawn Health
Enhances Color Without Excess Growth

Apply NOW on Tall Fescue, Kentucky Bluegrass, and Centipede lawns

Select Size 18 lbs. 4,000 sq ft. 25 lbs. 4,000-7,000 sqft. Most Popular 50 lbs. up to 12,000 sqft. Best Value

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Stock status: In Stock

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Expert Support

Looking to protect your lawn from summer stress while keeping it dark green and healthy? Emerald 10‑0‑20 is your go-to solution. This professional-grade fertilizer delivers deep color and lasting performance with 45% slow-release nitrogen and a powerful boost of potassium.

Now upgraded with Micronutrient Technology, every granule is coated with essential micros and amino acids for better absorption, improved soil health, and visibly stronger turf.

Dark green color without fast growth
45% slow-release nitrogen for long-lasting feeding
High potassium builds root strength and boosts stress tolerance
Micronutrients to improve turf color and health
Phosphorus-free formula — ideal for phosphorus-sensitive lawns like Centipede

Need a Stronger Nitrogen Push?

If you want faster green-up and more top growth, consider our Almighty 20-0-10. It delivers double the nitrogen of Emerald 10-0-20 for instant color.

Grow Beyond Green
Emerald 10‑0‑20 delivers more than just color — it builds turf that can take the heat, resist disease, and bounce back stronger.

When To Apply

Apply every 6–8 weeks during the growing season:

Tall Fescue & Kentucky Bluegrass: May through August
Zoysia: May through October
St. Augustine: May through December
Centipede: March through August (every other month)

Tip: For Centipede lawns, alternate Emerald with NutriGreen 0‑0‑4 for balanced nutrition without overfeeding.

Application Instructions

Apply 4-5 lbs per 1,000 sq ft using a broadcast spreader
Water in after application
Sweep fertilizer off sidewalks, driveways, and patios to avoid staining
Apply every 6-weeks

Details

Key	Value
Lawn Types	Tall fescue, Centipede, Bermuda, Zoysia, St. augustine, Kentucky bluegrass, Ryegrass
Special Features	45% Slow-release Nitrogen (Accublue60) and NuTrace (every granule is coated with micronutrients)
Application Rate	4-5 lbs. per 1,000 sq. ft. every six weeks
Time to Apply	Spring, Summer, Fall
Delivery System	Granules
Brand	Lawn Synergy
For Use In	Turf Grass

FAQ

Is this lawn fertilizer safe for my lawn?

This blend of lawn fertilizer is ideal for all lawn types. It is also a great stress blend during the summer months for all lawn types. It contains slow-release nitrogen which also will prevent nitrogen burn.

How long will it take for the fertilizer to work?

Once your application is applied and watered in, expect 7-14 days to notice a difference. As the nutrients begin to work, you will notice the lawn growing and darkening up in color.

Can I use this on St. Augustine or Centipede lawns?

Yes. Emerald is phosphorus-free and safe for both. For Centipede lawns, alternate with a lower-nitrogen product like NutriGreen 0‑0‑4 to avoid over-fertilization.

Will it stain my concrete or patio?

Fertilizer with iron can stain hard surfaces, so always sweep/blow stray granules off immediately. Do not wash it off with water.

How long does it feed the lawn?

Emerald feeds slowly and steadily for up to 8 weeks thanks to the 45% slow-release nitrogen. We recommend re-applying fertilizer at 6 weeks to allow some overlap.