klsgc and Riggle,
If you look back on the first page you will see I state in a wet year (or irrigated lawn) I can see where an "extra" application may be warranted due to turf not going dormant.
Also most homeowners overwater their lawns and unfortunately more need needs to be applied.
As far as summer annuals and nutsedge I think its on page 2 or 3 where we already discussed this.
I bet we get calls from less then 5% of our customers about summer weeds.
Again you just have to educate them and let them know that when you don't have grass you have weeds due to lack of competition.
Thing is...if it is hot and dry you will not get good control anyway. So why spray if weeds are dormant and not going to die.