Atrazine is a great pre and post emergent herbicide to control many broadleaf weeds with out killing you existing grass. I do not recommend using this product when the afternoon temperatures reach 85 degrees or above. Down here in Florida it is recommended to stop using Atrazine after April 15th other wise you may burn your lawn. That is assuming you would be doing a broadcast spray of your entire lawn. If you are just spraying a selective area then the 85 degree caution does not apply.

• Kills 38 Weeds And Grasses In Home Lawns.
• Controls broad leaf weeds such as Henbit, Clover, Spurge, Crabgrass and Yellow Nutsedge
• 1 1/2 Tablespoon Covers 500 sq. ft.

Kills 38 Weeds And Grasses In Home Lawns.Florida, United States