Mackey from Gonzales, La writes
It is recommended that you apply Hi-Yield 2, 4-D Selective Weed Killer when the temperature is at least about 55 degrees Fahrenheit. We do not recommend applying if you are expecting a freeze within about 24 hours of the application since this will put extra stress on the turfgrass. Most plants are not actively when it is that cold, thus reducing the efficacy of the herbicide.
Answer last updated on: 01/09/2021
