SKU: 641499488
pre emergent herbicide for st augustine grass

pre emergent herbicide for st augustine grass 16-4-8 Fertilizer + Pre-Emergent Herbicide

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Ships within 48 hours · Estimated delivery Oct 1 - Oct 6

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Description

pre emergent herbicide for st augustine grass 16-4-8 Fertilizer + Pre-Emergent HerbicidePre emergent herbicide, when applied at the right times of year, will control weed populations before you see them. They do this by inhibiting seeds from forming roots, thus killing them as they germinate. Eradicating weeds when they germinate is the most efficient way to control weed populations is lawns, flower beds, and even gravel driveways and walkways. Its time efficient and cost effective, saving you months of combating weeds by mowing, weed

Pre-emergent herbicide, when applied at the right times of year, will control weed populations before you see them. They do this by inhibiting seeds from forming roots, thus killing them as they germinate.

Eradicating weeds when they germinate is the most efficient way to control weed populations is lawns, flower beds, and even gravel driveways and walkways. It’s time-efficient and cost-effective, saving you months of combating weeds by mowing, weed whacking, hand pulling, digging, and from using costlier products to spray out weeds.

  • 25 lb. bag covers up to 4,000 sq. ft.
  • 50 lb. bag covers up to 8,000 sq. ft.
  • Contains 16-4-8 + Iron plus Barricade pre-emergent herbicide
  • This pre-emergent contains a high amount of Nitrogen, so review the "when not to apply" exceptions below for your type of lawn.


Apply only at the recommended rate.

Use our yellow walk-behind spreader to distribute this granular product.

When to apply pre-emergent herbicide:

  • Apply 16-4-8 with Barricade to established Tall Fescue lawns in late winter and early spring to feed and prevent weeds. If you've already fertilized your Tall Fescue with nitrogen, then choose 0-0-7 with pre-emergent because it doesn't contain nitrogen.
  • Apply 16-4-8 with Barricade to established Bermuda and Zoysia lawns in spring during "green up" to feed and prevent weeds, usually from mid to late April.
  • Apply in the morning before temperatures rise above 80 degrees; do not apply during the heat of the day.
  • Apply it after one full growing season when your lawn in fully rooted in and you can no longer pull up areas of the sod, after you’ve mowed it at least three times, and after you can no longer see the seams.


When NOT to apply pre-emergent herbicide:

  • When seeding new lawns: Do not apply this product or any pre-emergent herbicide if you're planning on reseeding your lawn because it will inhibit germination of that seed too. If you have applied pre-emergent, wait 3-4 months before planting seeds, depending on climate conditions.
  • When laying new sod: Do not apply pre-emergent when laying sod because it will inhibit root formation if applied too soon. Likewise, do not apply pre-emergent before laying new sod - if you have applied pre-emergent, wait 3-4 months (depending on climate conditions) before laying new sod.
  • Don't apply 16-4-8 with Barricade to Tall Fescue in late spring or summer; apply it only during cool months; due to high Nitrogen, don't apply to Tall Fescue during warm months.
  • Do not apply to Centipede due to the high nitrogen; choose 0-0-7 with pre-emergent instead
  • Don't apply 16-4-8 with Barricade to warm-season lawns like Bermuda, Zoysia, and St. Augustine in fall when going dormant or in winter or spring before green up; due to high Nitrogen apply it only when these lawns are actively growing in late spring. Instead, apply 0-0-7 with pre-emergent in fall and winter.
  • Don't apply too soon: If you laid warm season sod in autumn, chances are it will need one full growing season (summer) to root in and fill in the seams, thus skipping the winter and spring applications. If you laid sod in the autumn, here is a general application timetable:
    • Zoysia - Safe to apply after Zoysia sod is 12 months old
    • St. Augustine - Safe to apply after St. Augustine sod is 12 months old
    • Centipede - Due to high nitrogen, not safe for Centipede at all
    • Bermuda - Safe to apply after *Bermuda sod is 6 months old
    • Tall Fescue - Safe to apply after Tall Fescue is 4 months old


*TifTuf Bermudagrass is the quickest sod to establish and beats expectations for filling in the seams. If you lay the TifTuf Bermudagrass variety late summer and it’s fully rooted in and no seams are visible, it’s safe to apply the winter application of pre-emergent herbicide.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 641499488

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Amy C.
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Color: Blue Green Orange, Color: Blue Green Orange
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Reviewed in the United States on May 26, 2026
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JUICY FURR
Pawtucket, US
★★★★★ 1
DON’T WASTE YOUR MONEY-it is CRAP!!!
Color: Blue Green Orange
What a Piece of Garbage! If I could I’d have given this ZERO STARS!!! My Dogs WON’T GET NEAR IT! Obviously it smells wrong or they sense that it is TRASH!! If I were a canine, I wouldn’t give it my consideration Either! It looks large online but when you receive it, it is a Small RAG! THIS Attempt at a SNUFFLE MAT IS INSULTING!!! DON’T WASTE YOUR MONEY on this GARBAGE‼️During the time period I had to return it, I was in the Hospital after having a Heart Attack!!I am still trying to Recover & I CANNOT DO MUCH!! Otherwise I would have returned it!!! It’s sitting in a corner in my bedroom. I had to unwrap the CHEAP PLASTIC WRAP COVER so I could even tell WHATit was. As It was diagonally Rolled UP, I had to unwrap & look at it & show it to my Dogs-The DOGS WOULDN’t get near it & now I’m STUCK WITH THIS PIECE OF GARBAGE THAT I CANNOT GET MY MONEY BACK ON‼️Yes, I am upset ! This ugly Thing hasn’t even been TOUCHED by my 3 Dogs & now I’m STUCK WITH SOMETHING USELESS THAT MY DOGS WOULDN’t even get near & I CAN’T GET A REFUND FOR!!! THIS IS THE TYPE OF TRANSACTION THAT I FIND HIGHLY OFFENSIVE ABOUT AMAZON & the Fly By Night companies they represent!!!!!
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Reviewed in the United States on April 14, 2026
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Donna McGee
Los Angeles, US
★★★★★ 3
Nice but…
Color: Blue Green Orange
Nice but not very sturdy and it comes rolled up so it’s difficult to get it to lay down for your dog.
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