LawnStar

16-4-8 NPK Fertilizer

Well-balanced spring & summer lawn food for green and growth

This product is currently out of stock, check back soon.

$2495& FREE Shipping.

$5495& FREE Shipping.

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  • Encourages green, growth and healthy root development

  • Fast + slow release nitrogen blend ensures rapid green up and superior longevity

  • Perfect for treating common nutrient deficiencies, or, if you just want to give your turf a boost of vitality!

  • Ideal spring and summer fertilizer

  • With additional bio-stimulants (seaweed extract)

  • Delivered ready to go with hose-end sprayer attached (*32oz. size)

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4.6/5

Reviews

392

Total Reviews


Customer review
Reviews

Robert Weitzel

09/10/2020

Was trying to get a greener affect from this and chelated iron but was only able to match the look of scotts product from my neighbor.

Customer review
Reviews

Jose Hernandez

09/06/2020

First year user, applied every 5 to 6 weeks yield a green healthy lawn all season.

Customer review
Reviews

Chris Hardison

08/31/2020

easily applied, works great. I would recommend to a yo e wanting a better looking yard

Customer review
Reviews

Jordan Johnson

08/25/2020

Very happy with the results thus far. look forward to seeing the long term affects.

Customer review
Reviews

Carlos Martin

08/25/2020

I was able to apply the 16-4-8 NPK Fertilizer a day before it rained. Was thoroughly impressed at how easy it was to apply with spray bottle hose attachment. I saw results within 48hrs and now looking forward to purchasing other products from you via your online store of Amazon.

Package Dimensions

8.7 x 5.3 x 2.9 inches

Item Weight

3.30 pounds

Shipping Weight

3.30 pounds

Safety Data Sheet

Click here to download

Usage Instructions


For best results apply before 10 am, or after 5 pm. Application during the afternoon should be avoided.

Avoid mowing your lawn 24 hours prior to and after application to ensure proper uptake of 16–4–8.

Application should be repeated every three to six weeks, or on an as-needed basis.

Please ensure your lawn is on a suitable watering schedule. Water is essential to a healthy lawn and proper uptake of nutrients.

The included sprayer will automatically mix LawnStar 16–4–8 with water and dilute it at the proper rate.

1. Shake product well before use

2. Attach sprayer to a standard garden hose. Switch on water supply

3. Turn sprayer to the “ON” position. Important note: Push in plastic safety tab before attempting to adjust dial

4. Slowly apply the spray in a side-to-side motion, being sure to cover the area evenly. Aim to apply at a rate of 5–10 oz. per 1,000 sq. ft.

For less severe deficiency/maintenance, apply 5 oz. per 1,000 sq. ft.
For more severe nutrient deficiency, apply 10 oz. per 1,000 sq. ft.

May cause staining. Shake product well before use.

Warranty & Support


Covered by the Evergreen Guarantee: If you aren’t satisfied with the results you get from trying any one of our products, contact us within 30 days of your order date and we will arrange a no-questions-asked return plus refund.

Support Email: [email protected]

Safety Information: Although we opt for the safest ingredients, it is important to treat it carefully as you would any other lawn and garden product. Keep out of reach of children. Do not ingest. Detailed safety information can be found on the backside of the product label, or by clicking on the Specification tab and reviewing the Safety Data Sheet.

Is your lawn lacking in the nutrient department?

If you want to dominate your lawn this season, you’ve come to the right store.

As we step into Spring, it’s vital your lawn has the nutrients it needs to thrive throughout the growing seasons.

And the first thing you should focus on are the big three macronutrients: Nitrogen, Phosphorus and Potassium.

Consider these nutrients the foundation for the overall health, appearance and vitality of your lawn. Without them… You may as well do nothing at all.

Or… Has weed n’ feed left your turf worse for wear?

Look, we understand the short-term appeal of weed n’ feed solutions…

But while we understand the popularity of such products, part of our mission here at LawnStar is to continue to educate consumers that there are better alternatives out there. Solutions that aren’t only safer for you, your family and the environment, but also cheaper in the long run too. You can read more about our mission here.

Aside from the various health concerns surrounding these products, they compromise the long-term health of your lawn by wiping out all the beneficial organisms and fungi present in healthy soil. Your lawn effectively becomes reliant on these chemicals to survive.

We know, you’re probably asking “So how do I turn this thing around?”

It’s not as hard to repair the damage as you may think.

If you’re still using weed n’ feed, stop. Switch to using pre-emergent herbicides for weed control, and develop your lawn fertilization program starting with a well-rounded fertilizer.

Enter LawnStar® 16-4-8

16-4-8 Is the culmination of decades worth of experience in the lawn and turf industry. We’ve dialed in on the perfect 3-1-2 ratio of macronutrients that when applied, injects a powerful shot of vitality into your lawn. Diving into the specifics:

  • 16% Nitrogen: A specialty blend of 10% immediate and 6% slow release nitrogen sources ensure your grass experiences rapid greening that doesn’t fade again after a week.
  • 4% Phosphorus: Ensures strong, deep root growth and development resulting in a thicker, lusher lawn.
  • 8% Potassium: Means you get faster growth, and improved stress tolerance which better protects your turf from good ole’ mother nature.

Plus, we went a step further and packed 16-4-8 with beneficial biostimulants derived from seaweed extract, that further enhance the bioavailability of nutrients in the soil to repair and condition your lawn to a champion state.

Balanced lawn food for green, growth and vitality

The 32 oz. version comes with a sprayer permanently affixed to the bottle for ease of use and portability. It connects to any standard garden hose, and when switched to the ‘ON’ dial, will automatically dilute the fertilizer at the correct rate, ensuring applications are quicker, easier, and make less mess. This size is better for those starting out, or who don’t have a large area to cover – one 32 ounce bottle treats 4,000 sq. ft. of lawn.

The 1 gallon version comes delivered in a rugged container, ready to be diluted in your garden sprayer or hose-end sprayer bottles. Each container mixes to cover 16,000 sq. ft. of lawn, and is best suited towards those who have a large area to cover, or who want ultimate control to mix-in with other products, like: adjuvants (Non-Ionic Surfactant), spray indicators (Blue Spray Pattern Indicator), or their other fertilizers and herbicides.

16-4-8 is highly versatile and suitable for all grass types, including: Zoysiagrass, St. Augustinegrass, Bermudagrass, Centipedegrass, Kentucky Bluegrass, Perennial Ryegrass, Fine Fescue, Tall Fescue & more. Check out the Grass Identification Guide on our Lawn Care 101 blog, to figure out which grass type you have.

We provide detailed, simple to follow usage instructions on the back of both products. No flicking through pages reading tiny disclaimers full of fineprint (just one of the many benefits of opting for greener, safer solutions).

Make the change today

You’ve gotten this far, so you’re clearly interested in taking your lawn to the next level. Now is probably a good time we remind remind you that, as always, you’re backed by our Evergreen Guarantee (which you read more about here).

LawnStar® 16-4-8 is the all-in-one solution for treating common macronutrient deficiency, or, if you just want greener, fasting growing, healthier grass!

suitable for all grass types

All Grass Types

well balanced lawn food

Balanced Lawn Food

fast and slow release nitrogen

Fast + Slow Release Nitrogen


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4.6/5

Reviews

392

Total Reviews


Customer review
Reviews

Robert Weitzel

09/10/2020

Was trying to get a greener affect from this and chelated iron but was only able to match the look of scotts product from my neighbor.

Customer review
Reviews

Jose Hernandez

09/06/2020

First year user, applied every 5 to 6 weeks yield a green healthy lawn all season.

Customer review
Reviews

Chris Hardison

08/31/2020

easily applied, works great. I would recommend to a yo e wanting a better looking yard

Customer review
Reviews

Jordan Johnson

08/25/2020

Very happy with the results thus far. look forward to seeing the long term affects.

Customer review
Reviews

Carlos Martin

08/25/2020

I was able to apply the 16-4-8 NPK Fertilizer a day before it rained. Was thoroughly impressed at how easy it was to apply with spray bottle hose attachment. I saw results within 48hrs and now looking forward to purchasing other products from you via your online store of Amazon.

Customer review
Reviews

John Fields

08/22/2020

I tried this product for the first time on my back yard and was amazed with the results! Within just a few days, my lawn was thicker, greener, and more attractive!

Customer review
Reviews

Anthony Goodman

08/18/2020

Great Product. Will Order Again and Again!!

Customer review
Reviews

JASON KELLEY

08/17/2020

Great customer service! Excellent company! Looking forward to seeing my lawn come back after using these products.

Customer review
Reviews

Chris Sizemore

08/15/2020

I really like the result i got from using this product. It made my lawn more green and looks healthier.

Customer review
Reviews

Peter Crispi

08/13/2020

I have never had any issues with any of the LawnStar products

Package Dimensions

8.7 x 5.3 x 2.9 inches

Item Weight

3.30 pounds

Shipping Weight

3.30 pounds

Safety Data Sheet

Click here to download

Usage Instructions


For best results apply before 10 am, or after 5 pm. Application during the afternoon should be avoided.

Avoid mowing your lawn 24 hours prior to and after application to ensure proper uptake of 16–4–8.

Application should be repeated every three to six weeks, or on an as-needed basis.

Please ensure your lawn is on a suitable watering schedule. Water is essential to a healthy lawn and proper uptake of nutrients.

The included sprayer will automatically mix LawnStar 16–4–8 with water and dilute it at the proper rate.

1. Shake product well before use

2. Attach sprayer to a standard garden hose. Switch on water supply

3. Turn sprayer to the “ON” position. Important note: Push in plastic safety tab before attempting to adjust dial

4. Slowly apply the spray in a side-to-side motion, being sure to cover the area evenly. Aim to apply at a rate of 5–10 oz. per 1,000 sq. ft.

For less severe deficiency/maintenance, apply 5 oz. per 1,000 sq. ft.
For more severe nutrient deficiency, apply 10 oz. per 1,000 sq. ft.

May cause staining. Shake product well before use.

Warranty & Support


Covered by the Evergreen Guarantee: If you aren’t satisfied with the results you get from trying any one of our products, contact us within 30 days of your order date and we will arrange a no-questions-asked return plus refund.

Support Email: [email protected]

Safety Information: Although we opt for the safest ingredients, it is important to treat it carefully as you would any other lawn and garden product. Keep out of reach of children. Do not ingest. Detailed safety information can be found on the backside of the product label, or by clicking on the Specification tab and reviewing the Safety Data Sheet.

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