Johnny from Fayetteville, Ga. writes
Southern Ag Atrazine Weed Killer for St Augustine Grass may be applied during both dormant and growing seasons. Best results are usually obtained when applied in early spring or dormant periods when weeds are small or have not emerged. The only temperature restriction on the label is to not apply when the temperature is above 90 degrees.
Answer last updated on: 03/13/2018