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.
Emerald 10-0-20 Lawn Fertilizer
Emerald 10-0-20 delivers rich green color while helping established lawns build stronger roots and better withstand heat, drought, and everyday stress. Its high-potassium formula provides steady feeding without pushing excessive top growth.
$39.99
$44.99
Fast Shipping
Proven Results
Made in the USA
Expert Support
WHY CHOOSE
A Greener, Stronger Lawn Without Excessive Growth
Deep Color
Provides rich dark green color without triggering excessive top growth or uneven lawn appearance.
Steady Feeding
Slow release nitrogen feeds lawn evenly for weeks ensuring consistent growth and longer lasting results.
Root Strength
High potassium builds deeper stronger roots improving resistance to heat drought and everyday lawn stress.
Micro Boost
Contains micronutrients, iron, and amino acids to enhance nutrient absorption, enhances dark green color, and support healthier soil conditions.
Premium Upgrade
Stronger Greener Lawns Without Summer Stress
Protect your lawn from heat while keeping a deep green color with Emerald 10-0-20. Built with 45% slow-release nitrogen and high potassium for lasting performance.
This Is Right For You If:
- You want dark green color without fast growth
- You need long-lasting, steady feeding
- You want stronger roots and stress resistance
- You have phosphorus-sensitive lawns like Centipede
Best Timing
When to Use
Apply every 6 weeks during the growing season for stronger color, healthier roots, and consistent lawn performance.
Cool Season Lawns
Best for Tall Fescue and Kentucky Bluegrass from May through August.
Warm Season Lawns
Perfect for going into the cooler months. During the growing months, we recommend Almighty for warm season lawns.
Use Emerald For:
- Feeding stressed or weak lawns
- Improving lawn color and density
- Strengthening roots during summer heat
- Supporting long-lasting turf health
How it works
Apply Easily For Fast Greener Lawn Results
Steps to apply correctly, avoid mistakes, and achieve fast, visible lawn results.
COMMON QUESTIONS
Frequently Asked Questions
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.
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.
Fertilizer with iron can stain hard surfaces, so always sweep/blow stray granules off immediately. Do not wash it off with water.
Emerald feeds slowly and steadily for up to 6-8 weeks thanks to the 45% slow-release nitrogen. We recommend re-applying fertilizer at 6 weeks to allow some overlap.
Product resources
Product Information & Resources
Everything you need to understand, apply, and reference this product.
Details & Specifications
| 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 | |
| Time to Apply | Spring, Summer, Fall |
| Delivery System | Granules |
| For Use In | Turf Grass |
| Brand | Lawn Synergy |
Spreader Settings
Documents & Labels
Real Results
Real Homeowners Seeing Faster Greener Results
“I applied this once and saw greener grass within a week. Super easy to use, and my lawn looks thicker and healthier than ever.”
“I had a dull and pale yellow lawn for a while. I tried everything. Finally your product worked and my lawn is darker green, becoming much thicker. I couldn't be happier!”
“Super easy to apply. I just used the bag and within a week, I noticed a difference. It's been 4 weeks now and my neighbors are asking me what I did.”
Customer Reviews
Overall rating: 4.554167 / 5 from 240 reviews.
AI Generated Review Summary
Emerald 10-0-20 Lawn Fertilizer offers a dark green color and healthy lawn with its slow-release nitrogen and potassium. Customers appreciate its coverage and results, though opinions on color and effectiveness vary. It's suitable for various grass types and requires careful application to avoid staining.
Summary topics
- Product Results (25%): Based on a significant number of customers, they are very happy with the results of the product.
- Lawn Appearance (10%): Customers loved how the lawn looked after using the lawn fertilizer, as well as its ability to cover the lawn.
- Lawn Health (22%): A significant number of customers appreciated that the lawn looks great and has never looked better after using this product.
- Lawn Coverage (4%): Customers keep praising The Emerald 10-0-20 for its ability to cover the lawn.
- Lawn Color (5%): Opinions vary on the color, with some finding it nice and dark, while others did not get the color as promised.
Review topics: [].
Review highlights
- "The lawn is a really nice dark green color." —
- "Grass looks really good will buy again." —
- "My lawn quickly came back to life lush and green." —
Reviews
Zoysia lawn repair
"Attached are two photos, one of my front yard last fall after a sub contractor did a jack & bore. The second picture is end of July this year after adding plugs, pulling weeds and adding Lawn Synergy fertilizer per their schedule. I am totally pleased with the results."
I'm really happy with the
"I'm really happy with the quality of products and positive impact on my lawn. Also easy communication/response from staff is awesome!"
Big results
"My service doesn't do a summer feading for some reason and my lawn wasn't looking good. I put this down on a day when I knew it was going to rain. What a complete turnaround and I even had to cut sooner than once a week"
Product really greened up the
"Product really greened up the lawn within a week. The 25lb bag didn’t cover the sf that your calculations showed on the website even after putting my spreader on the setting it recommended. Next time I will have to order the large bag."
Very happy with the usage
"Very happy with the usage of Emerald 10-0-20 fertilizer. We have had near drought conditions but our municipality has allowed sprinkler usage. Some burned out spots due to lack of water, but overall the lawn continues to look great!"
Awesome rich, dense green turf
"Awesome rich, dense green turf with few if any weeds, even during the hot dry portion of the summer. Great products."
Friends who stop over compliment
"Friends who stop over compliment my yard. Ask me what I'm using. I love the green and the Pfast Cal I highly recy"
Damaged grass
"I ordered this fertilizer to keep up with nutrients for my small yard. I didn't over water the grass, followed the instructions but it seems it slightly burnt the yard in certain areas. To be honest the yard looked better before the fertilizer was spread. Nothing i can do now to correct it. Little disappointed in the product."
Expected a better green color
"Expected a better green color lawn has been struggling a little bit"
Awesome product. My lawn has
"Awesome product. My lawn has never looked so good- even with this unpredictable weather we've been having. Highly recommend!!"
Q&A
- My lawn is summer stressed and starting to go dormant. It’s also consistently 85 degrees. Can this be applied ?
- Fertilizer should not be applied to a stressed lawn. It can still be applied when hot, but apply early in the AM or late in the afternoon avoiding the heat of the day. Water the product in well after applying.
- Does the Emerald contain any weed killer qualities? I have some clover, not much but would like to know if I will have to apply weed killer separately?
- The 20-0-10 Almighty Fertilizer does not contain weed control. Post emergent weed control products would need to be used separately.
- my lawn in the summer gets sun all day long will this work on my lawn?
- This is a great fertilizer choice to use of cool season grass types over the summer season.
- Does it work on zenith zoysia grass
- 10-0-20 is a great product to use on Zoysia sod as a winterizer fertilizer. During the summer growing season, I would recommend using the 20-0-10 Almighty for zoysia grass.
- How long before / after mowing should Emerald be applied?
- Emerald can be applied right after mowing. If you are planning to apply before mowing, make sure the product is watered in very well first and then mow once the lawn is dry.
Professional-Grade Lawn Care Made Simple
Feed your lawn with consistent, high-quality nutrients designed for real results without the guesswork.
