Joshua from Jacksonville, Fl writes
The label does not limit the use of Celsius to temperatures below 85 degrees. There are cautions about using surfactants and also a note about the possibility of Celsius causing temporary stunting of St. Augustine grass in hot weather. If you read some of the popular lawn forums they actually claim Celsius works better the hotter it gets.
As long as the temperature during the application of the Celsius WG Herbicide is not 85 degrees or above, then it does not matter what temperature it reaches mid day. The best time to apply herbicides is either early morning when dew is still fresh on the ground or late afternoon when the lawn and weeds are under less stress from the environment. Temperatures over 85 degrees will cause extra stress on your desirable turf, possibly causing damage.
Answer last updated on: 10/04/2016
