Hi-Yield Atrazine Weed Killer does not have to be watered in as the water mixed with the product will carry it through. It would be best to apply when the lawn is damp.
The exact amount of time it will take to see results with Hi-Yield Atrazine Weed Killer can vary somewhat, depending on what type(s) of weeds you are treating. Typically, Atrazine is a very slow-acting herbicide, and it can take up to 4-6 weeks after application to see full results.
Hi-Yield Atrazine Weed Killer can be applied early in the morning before temperatures reach 90 degrees if it's expected to get this hot on the day of application. You just do not want to apply during the time of high temperature because your desirable turfgrass is under more stress in high heat.
Atrazine is safe to use on your yard as long as you keep pets out of the area while you do the application, and until the ground has had time to completely dry.
As you probably know, Centipedegrass is a very sensitive species of turf so many products that eliminate the crabgrass and other weeds can also cause damage to your lawn. Hi Yield Atrazine is safe to be used on Centipede and it will suppress Crabgrass but may not completely eliminate it. It will also control a large variety of other broadleaf weeds. Tenacity is a great pre- and post-emergent herbicide that will control crabgrass along with many other types of weeds without harming your centipede lawn. Make sure to read the Tenacity label very carefully and mix exactly what is recommended as this is a strong product and mis-using it can cause temporary turf injury. When applying Tenacity it is highly recommended to use a temporary turf colorant like Turf Mark Blue to allow you to see where you are spraying. Overlapping your application of Tenacity can cause temporary whitening of the lawn as well, but the color will return in 3-4 weeks at most. Please let us know if you have any other questions.
The mixing rate for Hi-Yield Atrazine Weed Killer is 4.4 fl oz per gallon of water and will treat 1000 square feet. The rate of the surfactant is 1-2 teaspoons per gallon of water.
There are no restrictions on what type of St. Augustine grass the Hi-Yield Atrazine Weed Killer can be used on. The mixing ratio is 4.4 fl. oz. per gallon of water.