Last day of 90 degrees or less is tomorrow so I would like to spray Q4 for crabgrass and foxtail. I will put it in a 2 gallon spot sprayer and hit some bad patches all over the lawn. Lawn is fine turf type fescue, bluegrass, and rye. I did read the instructions but they give you a range of 1-5 gallons of water you could use per the ounces recomended. This is the first chemical that I have used that gives you a range and not a specific rate. What has worked for you guys in this aplication so close to the heat limit. A second application would not be a problem, rather do this than hurt the turf. Most of the grasses are very small and some I will have to pull. It is just way to much to pull when the back is not that great to start out with. Any help will be great.