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Yes, Yes and very good of you to leave dormant grass out of the spray round. I personally, will not take a lawn account if it is not on an automatic irrigation system. Why? Honolulu, Hawaii has 365 day growing season and less than 20 inches of rain per year.
 

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Most herbicides have a threshold of around 85 degrees as a max temp, but just as important you need to judge the condition of the turf. if it is 70 degrees and you have not seen rain in a couple of weeks and the lawn is stressed don't spray, you may see damage even with this type of weather condition
 

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It's rare that you cannot kill weeds, but when we're in a drought situation, weeds become nearly as dormant as the turf...."ester" herbicides usually work. Amines often have little affect when weeds go into dormancy. Just got some rain testerday -- hope it made it up your way. Good luck.
 
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