I want to spray my lawn once before winter to kill off some dandelion and plantain. Last night it frosted and got down to 28 degrees and is in the high 50's during the day. The bottle says not to spray under 45 degrees but it's not clear as to whether that means 45 degrees daytime temp or 45 degrees nighttime. Today it is again going to be in the high 50's with lows tonight around 28. Is it safe for me to spray this afternoon? FYI, I'm got 8 week old overseeded TTTF that doing well and hsa been cut at least 8 times.