Cart
Atrazine St. Augustine Weed Killer
Targeted Winter and Early Spring Weed Control for Southern Lawns.
$21.95
Make It Easy – Auto Delivery Program
Atrazine is a trusted selective herbicide designed specifically for St. Augustine and centipede grass. It controls many common broadleaf and grassy weeds without harming these sensitive warm-season turf types when used correctly.
What It Controls
- Dollarweed
- Clover
- Chickweed
- Henbit
- Spurge
- Florida betony
- Other listed broadleaf weeds
Atrazine is especially effective on winter weeds in southern lawns.
When to Apply
- Late winter to early spring
- When temperatures are below 85°F
- When turf is not under drought or heat stress
Avoid applying during high summer temperatures.
Application Rate
Mix 4.33 oz per 500 sq ft using approximately 1 gallon of water per 500 sq ft for even coverage.
- Apply evenly without overlapping
- Use a calibrated sprayer for accuracy
- Do not use hose-end sprayers for precise control
Important Notes
- Do not apply to stressed turf
- Not labeled for use on all grass types
- Always follow label directions
Atrazine is an excellent choice for southern homeowners managing winter and early-season broadleaf weeds in St. Augustine and centipede lawns.
| Key | Value |
|---|---|
| Active Ingredient | Atrazine 4% |
| Lawn Types | St. augustine, Centipede |
| Special Features | Kills weeds without damaging St. Augustine grass |
| Application Rate | |
| Time to Apply | Spring, Summer, Fall, Winter |
| Delivery System | Liquid |
| Brand | Southern Ag |
| For Use In | Turf Grass |
Got Questions?
Frequently Asked Questions
Overall rating: 4.7647057 / 5 from 17 reviews.
AI Generated Review Summary
Summary topics
Review topics: [].
Review highlights
Reviews
A
"Good so far first application"
A
"Good so far first application 👍"
Weed killer
"I did not get a chance to put this on the lawn but I read label and it seems that it should do the job. Looks like you have to be real careful around this chemical nothing to play with just be safe while using it"
Using Atrazine in Sarasota area (Florida)
"I followed label instruction exactly - it was 10 days ago - I still do not see any effect on the weeds"
Weed killer
"I did not get a chance to put this on the lawn but I read label and it seems that it should do the job. Looks like you have to be real careful around this chemical nothing to play with just be safe while using it"
slow working
"I am not seeing the results I thought I would. It may be working slow. I think I followed the directions but I could have did it wrong."
Atrazine application
"Very easy to use and dilute. Used a 2gal sprayer and it removed a large patch of clovers after about a week."
Awesome
"Product was as described, so far so good waiting to see the overall results"
Great stuff!
"One application and the weeds are gone."
Weeds
"Worked great on my dollar weed"
Q&A
- is it legal in california
- Based on the product label, there are no restrictions to using this product in California.
- Will it kill the Bahai grass in my st Augustine lawn?
- No, this will not **** Bahai Grass
- Will it kill the Bahai grass in my st Augustine lawn?
- No, this product will not **** the Bahai Grass
- Will atrazine kill Poana grass or Poana weeds?
- No. A better product would be Certainty (sulfosulfuron): https://lawnsynergy.com/products/certainty-herbicide-****-killer It can work effectively for controlling Poa annua (Annual Bluegrass) in warm-season lawns. It is a post-emergent herbicide that is particularly effective at controlling Poa annua without damaging most warm-season grasses like Bermuda, Zoysia, and St. Augustine when used correctly. Certainty works by inhibiting an enzyme involved in plant growth, which targets broadleaf weeds and grasses like Poa annua. It is most effective when applied to actively growing Poa annua. The timing of application is crucial for optimal results, so it’s best applied during Poa annua's active growth period (fall or early spring, depending on your location and climate).
- Will this kill crabgrass?
- Atrazine will not **** crabgrass but it can be used for suppression of crabgrass.
Overall rating: 4.7647057 / 5 from 17 reviews.
AI Generated Review Summary
Summary topics
Review topics: [].
Review highlights
Reviews
A
"Good so far first application"
A
"Good so far first application 👍"
Weed killer
"I did not get a chance to put this on the lawn but I read label and it seems that it should do the job. Looks like you have to be real careful around this chemical nothing to play with just be safe while using it"
Using Atrazine in Sarasota area (Florida)
"I followed label instruction exactly - it was 10 days ago - I still do not see any effect on the weeds"
Weed killer
"I did not get a chance to put this on the lawn but I read label and it seems that it should do the job. Looks like you have to be real careful around this chemical nothing to play with just be safe while using it"
slow working
"I am not seeing the results I thought I would. It may be working slow. I think I followed the directions but I could have did it wrong."
Atrazine application
"Very easy to use and dilute. Used a 2gal sprayer and it removed a large patch of clovers after about a week."
Awesome
"Product was as described, so far so good waiting to see the overall results"
Great stuff!
"One application and the weeds are gone."
Weeds
"Worked great on my dollar weed"
Q&A
- is it legal in california
- Based on the product label, there are no restrictions to using this product in California.
- Will it kill the Bahai grass in my st Augustine lawn?
- No, this will not **** Bahai Grass
- Will it kill the Bahai grass in my st Augustine lawn?
- No, this product will not **** the Bahai Grass
- Will atrazine kill Poana grass or Poana weeds?
- No. A better product would be Certainty (sulfosulfuron): https://lawnsynergy.com/products/certainty-herbicide-****-killer It can work effectively for controlling Poa annua (Annual Bluegrass) in warm-season lawns. It is a post-emergent herbicide that is particularly effective at controlling Poa annua without damaging most warm-season grasses like Bermuda, Zoysia, and St. Augustine when used correctly. Certainty works by inhibiting an enzyme involved in plant growth, which targets broadleaf weeds and grasses like Poa annua. It is most effective when applied to actively growing Poa annua. The timing of application is crucial for optimal results, so it’s best applied during Poa annua's active growth period (fall or early spring, depending on your location and climate).
- Will this kill crabgrass?
- Atrazine will not **** crabgrass but it can be used for suppression of crabgrass.